/*
* cagft()
*
* ca get field test
*
* test ca get over the range of CA data types
*/
static int cagft(char *pname)
{
const unsigned maxTries = 1000ul;
unsigned ntries = 0u;
chid chan_id;
int status;
int i;
/*
* convert name to chan id
*/
status = ca_search(pname, &chan_id);
SEVCHK(status,NULL);
status = ca_pend_io(5.0);
if(status != ECA_NORMAL){
SEVCHK(ca_clear_channel(chan_id),NULL);
printf("Not Found %s\n", pname);
return -1;
}
printf("name:\t%s\n",
ca_name(chan_id));
printf("native type:\t%s\n",
dbr_type_to_text(ca_field_type(chan_id)));
printf("native count:\t%lu\n",
ca_element_count(chan_id));
/*
* fetch as each type
*/
for(i=0; i<=LAST_BUFFER_TYPE; i++){
if(ca_field_type(chan_id)==DBR_STRING) {
if( (i!=DBR_STRING)
&& (i!=DBR_STS_STRING)
&& (i!=DBR_TIME_STRING)
&& (i!=DBR_GR_STRING)
&& (i!=DBR_CTRL_STRING)) {
continue;
}
}
/* ignore write only types */
if (
i == DBR_PUT_ACKT ||
i == DBR_PUT_ACKS ) {
continue;
}
status = ca_array_get_callback(
i,
ca_element_count(chan_id),
chan_id,
printit,
NULL);
SEVCHK(status, NULL);
outstanding++;
}
/*
* wait for the operation to complete
* before returning
*/
while ( ntries < maxTries ) {
unsigned long oldOut;
oldOut = outstanding;
ca_pend_event ( 0.05 );
if ( ! outstanding ) {
SEVCHK ( ca_clear_channel ( chan_id ), NULL );
printf ( "\n\n" );
return 0;
}
if ( outstanding == oldOut ) {
ntries++;
}
}
SEVCHK ( ca_clear_channel ( chan_id ), NULL );
return -1;
}
PyObject *pv_getter_pvdim(pvobject * self, void *closure)
{
if (self->chanId)
return PyInt_FromLong(ca_element_count(self->chanId));
else {
PYCA_ERR("pvdim: invalid chid");
}
}
static void printChidInfo(chid chid, char *message)
{
printf("\n%s\n",message);
printf("pv: %s type(%d) nelements(%ld) host(%s)",
ca_name(chid),ca_field_type(chid),ca_element_count(chid),
ca_host_name(chid));
printf(" read(%d) write(%d) state(%d)\n",
ca_read_access(chid),ca_write_access(chid),ca_state(chid));
}
static int stateHandlerInvoke(Tcl_Event* p, int flags) {
/* called from Tcl event loop, when the connection status changes */
connectionEvent *cev =(connectionEvent *) p;
pvInfo *info = cev->info;
Tcl_Obj *script = Tcl_DuplicateObj(info->connectprefix);
Tcl_IncrRefCount(script);
/* append cmd of PV and up/down */
Tcl_Obj *cmdname = Tcl_NewObj();
Tcl_GetCommandFullName(info->interp, info->cmd, cmdname);
int code = Tcl_ListObjAppendElement(info->interp, script, cmdname);
if (code != TCL_OK) {
goto bgerr;
}
if (cev->op == CA_OP_CONN_UP) {
info->connected = 1;
/* Retrieve information about type and number of elements */
info->nElem = ca_element_count(info->id);
info->type = ca_field_type(info->id);
} else {
info->connected = 0;
}
code = Tcl_ListObjAppendElement(info->interp, script, Tcl_NewBooleanObj(info->connected));
if (code != TCL_OK) {
goto bgerr;
}
Tcl_Preserve(info->interp);
code = Tcl_EvalObjEx(info->interp, script, TCL_EVAL_GLOBAL);
if (code != TCL_OK) { goto bgerr; }
Tcl_Release(info->interp);
Tcl_DecrRefCount(script);
/* this event was successfully handled */
return 1;
bgerr:
/* put error in background */
Tcl_AddErrorInfo(info->interp, "\n (epics connection callback script)");
Tcl_BackgroundException(info->interp, code);
/* this event was successfully handled */
return 1;
}
static void connection_handler ( struct connection_handler_args args )
{
pv *ppv = ( pv * ) ca_puser ( args.chid );
if ( args.op == CA_OP_CONN_UP ) {
nConn++;
if (!ppv->onceConnected) {
ppv->onceConnected = 1;
/* Set up pv structure */
/* ------------------- */
/* Get natural type and array count */
ppv->dbfType = ca_field_type(ppv->chid);
ppv->dbrType = dbf_type_to_DBR_TIME(ppv->dbfType); /* Use native type */
if (dbr_type_is_ENUM(ppv->dbrType)) /* Enums honour -n option */
{
if (enumAsNr) ppv->dbrType = DBR_TIME_INT;
else ppv->dbrType = DBR_TIME_STRING;
}
else if (floatAsString &&
(dbr_type_is_FLOAT(ppv->dbrType) || dbr_type_is_DOUBLE(ppv->dbrType)))
{
ppv->dbrType = DBR_TIME_STRING;
}
/* Set request count */
ppv->nElems = ca_element_count(ppv->chid);
ppv->reqElems = reqElems > ppv->nElems ? ppv->nElems : reqElems;
/* Issue CA request */
/* ---------------- */
/* install monitor once with first connect */
ppv->status = ca_create_subscription(ppv->dbrType,
ppv->reqElems,
ppv->chid,
eventMask,
event_handler,
(void*)ppv,
NULL);
}
}
else if ( args.op == CA_OP_CONN_DOWN ) {
nConn--;
ppv->status = ECA_DISCONN;
print_time_val_sts(ppv, reqElems);
}
}
/*
* VERIFY_VALUE
*
* initiate print out the values in a database access interface structure
*/
static void verify_value(chid chan_id, chtype type)
{
int status;
/*
* issue a get which calls back `printit'
* upon completion
*/
status = ca_array_get_callback(
type,
ca_element_count(chan_id),
chan_id,
printit,
NULL);
SEVCHK(status, NULL);
outstanding++;
}
static void exCB(struct exception_handler_args args)
{
#define MAX_EXCEPTIONS 25
static int nexceptions=0;
static int ended=0;
if(ended) return;
if(nexceptions++ > MAX_EXCEPTIONS) {
ended=1;
fprintf(stderr,"exCB Exception: Channel Access Exception:\n"
"Too many exceptions [%d]\n"
"No more will be handled\n"
"Please fix the problem and restart camonitorpv",
MAX_EXCEPTIONS);
ca_add_exception_event(NULL, NULL);
return;
}
fprintf(stderr,"exCB Exception: Channel Access Exception:\n"
" Channel Name: %s\n"
" Native Type: %s\n"
" Native Count: %lu\n"
" Access: %s%s\n"
" IOC: %s\n"
" Message: %s\n"
" Context: %s\n"
" Requested Type: %s\n"
" Requested Count: %ld\n"
" Source File: %s\n"
" Line number: %u",
args.chid?ca_name(args.chid):"Unavailable",
args.chid?dbf_type_to_text(ca_field_type(args.chid)):"Unavailable",
args.chid?ca_element_count(args.chid):0,
args.chid?(ca_read_access(args.chid)?"R":""):"Unavailable",
args.chid?(ca_write_access(args.chid)?"W":""):"",
args.chid?ca_host_name(args.chid):"Unavailable",
ca_message(args.stat)?ca_message(args.stat):"Unavailable",
args.ctx?args.ctx:"Unavailable",
dbf_type_to_text(args.type),
args.count,
args.pFile?args.pFile:"Unavailable",
args.pFile?args.lineNo:0);
}
// Channel Access callback
// Should be invoked with the control info 'get' data,
// requested in the connection handler.
void ProcessVariable::control_callback(struct event_handler_args arg)
{
ProcessVariable *me = (ProcessVariable *) ca_puser(arg.chid);
LOG_ASSERT(me != 0);
if (arg.status != ECA_NORMAL)
{
LOG_MSG("ProcessVariable(%s) control_callback failed: %s\n",
me->getName().c_str(), ca_message(arg.status));
return;
}
try
{
{
Guard guard(__FILE__, __LINE__, *me);
if (me->state != GETTING_INFO || me->id == 0)
{
LOG_MSG("ProcessVariable(%s) received control_callback while %s, id=0x%lX\n",
me->getName().c_str(), me->getStateStr(guard), (unsigned long) me->id);
return;
}
// For native type DBR_xx, use DBR_TIME_xx, and native count:
me->dbr_type = ca_field_type(me->id) + DBR_TIME_STRING;
me->dbr_count = ca_element_count(me->id);
me->state = CONNECTED;
// Setup the PV info.
if (!me->setup_ctrl_info(guard, arg.type, arg.dbr))
return;
}
// Notify listeners that PV is now fully connected.
me->firePvConnected();
}
catch (GenericException &e)
{
LOG_MSG("ProcessVariable(%s) control_callback exception:\n%s\n",
me->getName().c_str(), e.what());
}
}
static void exceptionCallback(struct exception_handler_args args)
{
const char *context = (args.ctx ? args.ctx : "unknown");
errlogPrintf("DB CA Link Exception: \"%s\", context \"%s\"\n",
ca_message(args.stat), context);
if (args.chid) {
errlogPrintf(
"DB CA Link Exception: channel \"%s\"\n",
ca_name(args.chid));
if (ca_state(args.chid) == cs_conn) {
errlogPrintf(
"DB CA Link Exception: native T=%s, request T=%s,"
" native N=%ld, request N=%ld, "
" access rights {%s%s}\n",
dbr_type_to_text(ca_field_type(args.chid)),
dbr_type_to_text(args.type),
ca_element_count(args.chid),
args.count,
ca_read_access(args.chid) ? "R" : "",
ca_write_access(args.chid) ? "W" : "");
}
}
}
/*
* capft
*
* test ca_put() over a range of data types
*
*/
static int capft(
char *pname,
char *pvalue
)
{
dbr_short_t shortvalue;
dbr_long_t longvalue;
dbr_float_t floatvalue;
dbr_char_t charvalue;
dbr_double_t doublevalue;
unsigned long ntries = 10ul;
int status;
chid chan_id;
if (((*pname < ' ') || (*pname > 'z'))
|| ((*pvalue < ' ') || (*pvalue > 'z'))){
printf("\nusage \"pv name\",\"value\"\n");
return -1;
}
/*
* convert name to chan id
*/
status = ca_search(pname, &chan_id);
SEVCHK(status,NULL);
status = ca_pend_io(5.0);
if(status != ECA_NORMAL){
SEVCHK(ca_clear_channel(chan_id),NULL);
printf("Not Found %s\n", pname);
return -1;
}
printf("name:\t%s\n", ca_name(chan_id));
printf("native type:\t%d\n", ca_field_type(chan_id));
printf("native count:\t%lu\n", ca_element_count(chan_id));
/*
* string value ca_put
*/
status = ca_put(
DBR_STRING,
chan_id,
pvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_STRING);
if(ca_field_type(chan_id)==0)goto skip_rest;
if(sscanf(pvalue,"%hd",&shortvalue)==1) {
/*
* short integer ca_put
*/
status = ca_put(
DBR_SHORT,
chan_id,
&shortvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_SHORT);
status = ca_put(
DBR_ENUM,
chan_id,
&shortvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_ENUM);
charvalue=(dbr_char_t)shortvalue;
status = ca_put(
DBR_CHAR,
chan_id,
&charvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_CHAR);
}
if(sscanf(pvalue,"%d",&longvalue)==1) {
/*
* long integer ca_put
*/
status = ca_put(
DBR_LONG,
chan_id,
&longvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_LONG);
}
if(epicsScanFloat(pvalue, &floatvalue)==1) {
/*
* single precision float ca_put
*/
status = ca_put(
DBR_FLOAT,
chan_id,
&floatvalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_FLOAT);
}
if(epicsScanDouble(pvalue, &doublevalue)==1) {
/*
* double precision float ca_put
*/
status = ca_put(
DBR_DOUBLE,
chan_id,
&doublevalue);
SEVCHK(status, NULL);
verify_value(chan_id, DBR_DOUBLE);
}
skip_rest:
/*
* wait for the operation to complete
* (outstabnding decrements to zero)
*/
while(ntries){
ca_pend_event(1.0);
if(!outstanding){
SEVCHK(ca_clear_channel(chan_id),NULL);
printf("\n\n");
return 0;
}
ntries--;
}
SEVCHK(ca_clear_channel(chan_id),NULL);
return -1;
}
int cagetFuZE(char *pvName, char *pvValue) {
RequestT request = get;
OutputT format = plain;
chtype dbrType = -1;
unsigned long reqElems = 0;
int n, result;
pv* pvs;
int i;
unsigned long nElems;
result = ca_context_create(ca_disable_preemptive_callback);
pvs = calloc(1, sizeof(pv));
pvs[0].name = pvName;
connect_pvs(pvs, 1);
for (n = 0; n < 1; n++) {
/* Set up pvs structure */
/* -------------------- */
/* Get natural type and array count */
nElems = ca_element_count(pvs[n].chid);
pvs[n].dbfType = ca_field_type(pvs[n].chid);
pvs[n].dbrType = dbrType;
/* Set up value structures */
if (format != specifiedDbr)
{
pvs[n].dbrType = dbf_type_to_DBR_TIME(pvs[n].dbfType); /* Use native type */
if (dbr_type_is_ENUM(pvs[n].dbrType)) /* Enums honour -n option */
{
if (enumAsNr) pvs[n].dbrType = DBR_TIME_INT;
else pvs[n].dbrType = DBR_TIME_STRING;
}
else if (floatAsString &&
(dbr_type_is_FLOAT(pvs[n].dbrType) || dbr_type_is_DOUBLE(pvs[n].dbrType)))
{
pvs[n].dbrType = DBR_TIME_STRING;
}
}
/* Issue CA request */
/* ---------------- */
if (ca_state(pvs[n].chid) == cs_conn)
{
nConn++;
pvs[n].onceConnected = 1;
if (request == callback)
{
/* Event handler will allocate value and set nElems */
pvs[n].reqElems = reqElems > nElems ? nElems : reqElems;
result = ca_array_get_callback(pvs[n].dbrType,
pvs[n].reqElems,
pvs[n].chid,
event_handler,
(void*)&pvs[n]);
} else {
/* We allocate value structure and set nElems */
pvs[n].nElems = reqElems && reqElems < nElems ? reqElems : nElems;
pvs[n].value = calloc(1, dbr_size_n(pvs[n].dbrType, pvs[n].nElems));
if (!pvs[n].value) {
fprintf(stderr,"Memory allocation failed\n");
return -1;
}
result = ca_array_get(pvs[n].dbrType,
pvs[n].nElems,
pvs[n].chid,
pvs[n].value);
}
pvs[n].status = result;
} else {
pvs[n].status = ECA_DISCONN;
}
}
if (!nConn) return -1; /* No connection? We're done. */
/* Wait for completion */
/* ------------------- */
result = ca_pend_io(caTimeout);
if (result == ECA_TIMEOUT) {
fprintf(stderr, "Read operation timed out: some PV data was not read.\n");
return -1;
}
if (request == callback) /* Also wait for callbacks */
{
if (caTimeout != 0)
{
double slice = caTimeout / PEND_EVENT_SLICES;
for (n = 0; n < PEND_EVENT_SLICES; n++)
{
ca_pend_event(slice);
if (nRead >= nConn) break;
}
if (nRead < nConn) {
fprintf(stderr, "Read operation timed out: some PV data was not read.\n");
return -1;
}
} else {
/* For 0 timeout keep waiting until all are done */
while (nRead < nConn) {
ca_pend_event(1.0);
}
}
}
// Does this kill the connection??
ca_context_destroy();
sprintf(pvValue, "%s\n", val2str(pvs[0].value, pvs[0].dbrType, 0));
return 1;
}
void mcaMonitorEventHandler(struct event_handler_args arg)
{ union db_access_val *pBuf;
struct mca_channel* PCHNL = (struct mca_channel*)arg.usr;
double *myDblPr;
chtype RequestType;
int i,Cnt;
mxArray* mymxArray;
pBuf = (union db_access_val *)arg.dbr;
//mexPrintf("MCA Monitor Event Handler Called\n");
PCHNL->MonitorEventCount++;
Cnt = ca_element_count(arg.chid);
RequestType = dbf_type_to_DBR(ca_field_type(arg.chid)); // Closest to the native
if(RequestType==DBR_STRING)
{ if(Cnt==1)
{ mxDestroyArray(PCHNL->CACHE); // clear mxArray that pointed to by PCHNL->CACHE
PCHNL->CACHE = mxCreateString((char*)((pBuf)->strval)); // Create new array with current string value
mexMakeArrayPersistent(PCHNL->CACHE);
}
else
{ for(i=0;i<Cnt;i++)
{ mymxArray = mxGetCell(PCHNL->CACHE,i);
mxDestroyArray(mymxArray);
mymxArray = mxCreateString( (char*) (&(pBuf->strval)+i) );
mexMakeArrayPersistent(mymxArray);
mxSetCell(PCHNL->CACHE,i,mymxArray);
}
}
}
else
{ myDblPr = mxGetPr(PCHNL->CACHE);
switch(RequestType)
{ case DBR_INT: // As defined in db_access.h DBR_INT = DBR_SHORT = 1
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->intval)+i));
break;
case DBR_FLOAT:
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->fltval)+i));
break;
case DBR_ENUM:
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->enmval)+i));
break;
case DBR_CHAR:
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->charval)+i));
break;
case DBR_LONG:
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->longval)+i));
break;
case DBR_DOUBLE:
for (i = 0; i<Cnt;i++)
myDblPr[i]= (double)(*(&((pBuf)->doubleval)+i));
break;
}
}
if(PCHNL->MonitorCBString)
{
mexEvalString(PCHNL->MonitorCBString);
}
}
void mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i,j, k, status,buflen,Cnt, Hndl, L,M,N, NumHandles, commandswitch;
int *HndlArray;
mxArray *mymxArray;
double *myDblPr;
chtype RequestType;
char PVName[PV_NAME_LENGTH_MAX+1];
// char MCAMessageString[MCA_MESSAGE_STRING_LENGTH_MAX+1];
dbr_string_t StrBuffer;
const char *MCAInfoFields[]={"PVName","ElementCount","NativeType","State","MCAMessage","Host"};
char *NativeTypeStrings[] = {"STRING","INT","FLOAT","ENUM","CHAR","LONG","DOUBLE"};
if(!CA_INITIALIZED) // Initialize CA if not initialized (first call)
{ mexPrintf("Initializing MATLAB Channel Access ... \n");
status = ca_task_initialize();
if(status!=ECA_NORMAL)
mexErrMsgTxt("Unable to initialise Challel Access\n");
CA_INITIALIZED = true;
// Register a function to be called when a this mex-file is cleared from memory
// with 'clear' or when exitting MATLAB
mexAtExit(mca_cleanup);
// Lock the mex-file so that it can not be cleared without explicitly
// mexUnclock
mexLock();
//start periodic polling:
/* PollTimerHandle = SetTimer(NULL,NULL,MCA_POLL_PERIOD,background_poll);
if(PollTimerHandle)
mexPrintf("Periodic CA polling started! System Timer ID: %u\n",PollTimerHandle);
else
mexWarnMsgTxt("Failed to start periodic CA polling\n");
*/
}
commandswitch = (int)mxGetScalar(prhs[0]);
switch(commandswitch)
{ case 0:
mexUnlock();
break;
case 1: // MCAOPEN - add channel(s) by PV names, all arguments following prhs[0]
// must be strings - names of PV's
for(i=1;i<nrhs;i++)
{ mxGetString(prhs[i],PVName,PV_NAME_LENGTH_MAX+1);
status = ca_search(PVName,&(CHNLS[HandlesUsed].CHID));
if(status == ECA_NORMAL) // if not - go on to the next PV name
{ status = ca_pend_io(MCA_SEARCH_TIMEOUT);
if (status == ECA_NORMAL)
{ // Allocate persistent memory for the DataBuffer on this channel
// to hold all elements of the DBR_XXX type
// nearest to the native type
// RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[HandlesUsed].CHID));
// Cnt=ca_element_count(CHNLS[HandlesUsed].CHID);
CHNLS[HandlesUsed].NumElements = ca_element_count(CHNLS[HandlesUsed].CHID);
CHNLS[HandlesUsed].NativeType2DBR = dbf_type_to_DBR(ca_field_type(CHNLS[HandlesUsed].CHID));
CHNLS[HandlesUsed].MonitorEventCount = 0;
switch(CHNLS[HandlesUsed].NativeType2DBR)
{ case DBR_STRING:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_string_t));
break;
case DBR_INT: // As defined in db_access.h DBR_INT = DBR_SHORT = 1
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_short_t));
break;
case DBR_FLOAT:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_float_t));
break;
case DBR_ENUM:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_enum_t));
break;
case DBR_CHAR:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_char_t));
break;
case DBR_LONG:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_short_t));
break;
case DBR_DOUBLE:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_double_t));
break;
}
mexMakeMemoryPersistent(CHNLS[HandlesUsed].DataBuffer);
if(CHNLS[HandlesUsed].NativeType2DBR==DBR_STRING) // CACHE
{ if(CHNLS[HandlesUsed].NumElements==1) // Create MATLAB string - originally empty
CHNLS[HandlesUsed].CACHE = mxCreateString("");
else // Create MATLAB cell array of strings
{ CHNLS[HandlesUsed].CACHE = mxCreateCellMatrix(1,CHNLS[HandlesUsed].NumElements);
for(k=0;k<CHNLS[HandlesUsed].NumElements;k++)
{ mymxArray = mxCreateString("");
mexMakeArrayPersistent(mymxArray);
mxSetCell(CHNLS[HandlesUsed].CACHE, k, mymxArray);
}
}
}
else // Make CACHE a numeric mxArray
{ CHNLS[HandlesUsed].CACHE = mxCreateDoubleMatrix(1,CHNLS[HandlesUsed].NumElements,mxREAL);
}
mexMakeArrayPersistent(CHNLS[HandlesUsed].CACHE);
plhs[i-1]=mxCreateScalarDouble(++HandlesUsed);
}
else
plhs[i-1]=mxCreateScalarDouble(0);
}
else
plhs[i-1]=mxCreateScalarDouble(0);
} break;
case 2:// MCAOPEN - add channel(s) by PV names. The arguments following prhs[0]
// argument must be a cell array of strings - PV names
L = mxGetM(prhs[1])*mxGetN(prhs[1]);
plhs[0] = mxCreateDoubleMatrix(1,L,mxREAL);
myDblPr = mxGetPr(plhs[0]);
for(i=0;i<L;i++)
{ mymxArray = mxGetCell(prhs[1],i);
mxGetString(mymxArray,PVName,PV_NAME_LENGTH_MAX+1);
status = ca_search(PVName,&(CHNLS[HandlesUsed].CHID));
if(status == ECA_NORMAL) // if not - go on to the next PV name
{ status = ca_pend_io(MCA_IO_TIMEOUT);
if (status == ECA_NORMAL)
{ // Allcate persistent memory for the DataBuffer on this channel
//RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[HandlesUsed].CHID));
CHNLS[HandlesUsed].NativeType2DBR = dbf_type_to_DBR(ca_field_type(CHNLS[HandlesUsed].CHID));
CHNLS[HandlesUsed].NumElements = ca_element_count(CHNLS[HandlesUsed].CHID);
CHNLS[HandlesUsed].MonitorEventCount = 0;
//Cnt=ca_element_count(CHNLS[HandlesUsed].CHID);
switch(CHNLS[HandlesUsed].NativeType2DBR)
{ case DBR_STRING:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_string_t));
break;
case DBR_INT: // As defined in db_access.h DBR_INT = DBR_SHORT = 1
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_short_t));
break;
case DBR_FLOAT:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_float_t));
break;
case DBR_ENUM:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_enum_t));
break;
case DBR_CHAR:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_char_t));
break;
case DBR_LONG:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_short_t));
break;
case DBR_DOUBLE:
CHNLS[HandlesUsed].DataBuffer = mxCalloc(CHNLS[HandlesUsed].NumElements,sizeof(dbr_double_t));
break;
}
mexMakeMemoryPersistent(CHNLS[HandlesUsed].DataBuffer);
if(CHNLS[HandlesUsed].NativeType2DBR == DBR_STRING) // CACHE
{ CHNLS[HandlesUsed].CACHE = mxCreateCellMatrix(1,CHNLS[HandlesUsed].NumElements);
for(k=0;k<CHNLS[HandlesUsed].NumElements;k++)
{ mymxArray = mxCreateString(StrBuffer);
mexMakeArrayPersistent(mymxArray);
mxSetCell(CHNLS[HandlesUsed].CACHE, k, mymxArray);
}
}
else
{ CHNLS[HandlesUsed].CACHE = mxCreateDoubleMatrix(1,CHNLS[HandlesUsed].NumElements,mxREAL);
}
mexMakeArrayPersistent(CHNLS[HandlesUsed].CACHE);
myDblPr[i] = ++HandlesUsed;
}
else
myDblPr[i] = 0;
}
else
myDblPr[i] = 0;
} break;
case 3: // MCAOPEN Return names of connected channels as cell array of strings
plhs[0] = mxCreateCellArray(1, &HandlesUsed);
for(i=0;i<HandlesUsed;i++)
{ if(CHNLS[i].CHID!=NULL)
{ mymxArray = mxCreateString(ca_name(CHNLS[i].CHID));
mxSetCell(plhs[0], i, mymxArray);
}
else
{ mymxArray = mxCreateString("");
//mexPrintf("Handle: %d PV: %s\n",i+1, "Cleared Channel");
mxSetCell(plhs[0], i, mymxArray);
}
} break;
case 5: // MCACLOSE permanently clear channel
Hndl = (int)mxGetScalar(prhs[1]);
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Handle out of range");
// If a monitor is installed, set the EVID pointer to NULL
// ca_clear_event dos not do it by itself
if(CHNLS[Hndl-1].EVID)
CHNLS[Hndl-1].EVID = NULL;
// If there is Callback String - destroy it
if(CHNLS[Hndl-1].MonitorCBString)
{ mxFree(CHNLS[Hndl-1].MonitorCBString);
CHNLS[Hndl-1].MonitorCBString =NULL;
}
if(ca_state(CHNLS[Hndl-1].CHID)==3)
mexWarnMsgTxt("Channel previously cleared");
else
if(ca_clear_channel(CHNLS[Hndl-1].CHID)!=ECA_NORMAL)
mexErrMsgTxt("ca_clear_channel failed");
break;
case 10: // MCAINFO return channels info as MATLAB structure array
if(HandlesUsed>0)
{ plhs[0] = mxCreateStructMatrix(1,HandlesUsed,6,MCAInfoFields);
for(i=0;i<HandlesUsed;i++)
{ mxSetFieldByNumber(plhs[0],i,0,mxCreateString(ca_name(CHNLS[i].CHID)));
mxSetFieldByNumber(plhs[0],i,1,mxCreateScalarDouble(ca_element_count(CHNLS[i].CHID)));
mxSetFieldByNumber(plhs[0],i,5,mxCreateString(ca_host_name(CHNLS[i].CHID)));
switch(ca_state(CHNLS[i].CHID))
{ case 1: // Disconnected due to Server or Network - may reconnect
mxSetFieldByNumber(plhs[0],i,2,mxCreateString("unknown"));
mxSetFieldByNumber(plhs[0],i,3,mxCreateString("disconnected"));
mxSetFieldByNumber(plhs[0],i,4,mxCreateString("Disconnected due to server or network problem"));
break;
case 2: // Normal connection
mxSetFieldByNumber(plhs[0],i,2,mxCreateString(NativeTypeStrings[ca_field_type(CHNLS[i].CHID)]));
mxSetFieldByNumber(plhs[0],i,3,mxCreateString("connected"));
mxSetFieldByNumber(plhs[0],i,4,mxCreateString("Normal connection"));
break;
case 3: // Disconnected by user
mxSetFieldByNumber(plhs[0],i,2,mxCreateString("unknown"));
mxSetFieldByNumber(plhs[0],i,3,mxCreateString("disconnected"));
mxSetFieldByNumber(plhs[0],i,4,mxCreateString("Permanently disconnected (cleared) by the user"));
break;
}
}
}
else
{ mexWarnMsgTxt("No connected PV's found");
plhs[0] = mxCreateDoubleMatrix(0,0,mxREAL);
}
break;
case 11: // MCAINFO return info for 1 channel by handle number
Hndl = (int)mxGetScalar(prhs[1]);
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Handle out of range");
plhs[0] = mxCreateStructMatrix(1,1,6,MCAInfoFields);
mxSetFieldByNumber(plhs[0],0,0,mxCreateString(ca_name(CHNLS[Hndl-1].CHID)));
mxSetFieldByNumber(plhs[0],0,1,mxCreateScalarDouble(ca_element_count(CHNLS[Hndl-1].CHID)));
mxSetFieldByNumber(plhs[0],0,5,mxCreateString(ca_host_name(CHNLS[Hndl-1].CHID)));
switch(ca_state(CHNLS[Hndl-1].CHID))
{ case 1: // Disconnected due to Server or Network - may reconnect
mxSetFieldByNumber(plhs[0],0,2,mxCreateString("unknown"));
mxSetFieldByNumber(plhs[0],0,3,mxCreateString("disconnected"));
mxSetFieldByNumber(plhs[0],0,4,mxCreateString("Disconnected due to server or network problem"));
break;
case 2: // Normal connection
mxSetFieldByNumber(plhs[0],0,2,mxCreateString(NativeTypeStrings[ca_field_type(CHNLS[Hndl-1].CHID)]));
mxSetFieldByNumber(plhs[0],0,3,mxCreateString("connected"));
mxSetFieldByNumber(plhs[0],0,4,mxCreateString("Normal connection"));
break;
case 3: // Disconnected by user
mxSetFieldByNumber(plhs[0],0,2,mxCreateString("unknown"));
mxSetFieldByNumber(plhs[0],0,3,mxCreateString("disconnected"));
mxSetFieldByNumber(plhs[0],0,4,mxCreateString("Permanently disconnected (cleared) by the user"));
break;
};
break;
case 12: // MCASTATE return an array of status (1 - OK, 0 - disconnected or cleared)
if(HandlesUsed>0)
{ plhs[0] = mxCreateDoubleMatrix(1,HandlesUsed,mxREAL);
myDblPr = mxGetPr(plhs[0]);
for(i=0;i<HandlesUsed;i++)
myDblPr[i] = (double)(ca_state(CHNLS[i].CHID)==2);
}
else
{ mexWarnMsgTxt("No connected PV's found");
plhs[0] = mxCreateDoubleMatrix(0,0,mxREAL);
}
break;
case 30: // poll
ca_poll();
break;
case 50: // MCAGET Get PV values by their MCA handles
for(i=0;i<nrhs-1;i++) // First loop: place all ca_get requests in the buffer
{ Hndl = (int)mxGetScalar(prhs[1+i]); //start from[1]: [0] argument is the commnads switch
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Invalid Handle");
RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID));
Cnt = ca_element_count(CHNLS[Hndl-1].CHID);
status = ca_array_get(RequestType,Cnt,CHNLS[Hndl-1].CHID,CHNLS[Hndl-1].DataBuffer);
if(status!=ECA_NORMAL)
mexPrintf("Error in call to ca_array_get\n");
}
status = ca_pend_io(MCA_GET_TIMEOUT);
if(status!=ECA_NORMAL)
mexErrMsgTxt("... ca_pend_io call timed out \n");
for(i=0;i<nrhs-1;i++) // Another loop to copy data from temp structures to MATLAB
{ Hndl = (int)mxGetScalar(prhs[1+i]);
RequestType = RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID));
Cnt = ca_element_count(CHNLS[Hndl-1].CHID);
if(RequestType==DBR_STRING)
{ if(Cnt==1)
plhs[i] = mxCreateString((char*)(*((dbr_string_t*)(CHNLS[Hndl-1].DataBuffer))));
else
{ plhs[i] = mxCreateCellMatrix(1,Cnt);
for(j=0;j<Cnt;j++)
mxSetCell(plhs[i], j, mxCreateString((char*)(*((dbr_string_t*)(CHNLS[Hndl-1].DataBuffer)+j))));
}
}
else
{ plhs[i] = mxCreateDoubleMatrix(1,Cnt,mxREAL);
myDblPr = mxGetPr(plhs[i]);
switch(dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID)))
{ case DBR_INT: // As defined in db_access.h DBR_INT = DBR_SHORT = 1
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_short_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
case DBR_FLOAT:
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_float_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
case DBR_ENUM:
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_enum_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
case DBR_CHAR:
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_char_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
case DBR_LONG:
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_long_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
case DBR_DOUBLE:
for(j=0;j<Cnt;j++)
myDblPr[j]= (double)(*((dbr_double_t*)(CHNLS[Hndl-1].DataBuffer)+j));
break;
}
}
} break;
case 51: // MCAGET Get scalar PV of the same type
// second argument is an array of handles
// returns an array of values
myDblPr = mxGetPr(prhs[1]);
M = mxGetM(prhs[1]);
N = mxGetN(prhs[1]);
NumHandles = M*N;
plhs[0] = mxCreateDoubleMatrix(M,N,mxREAL);
for(i=0;i<NumHandles;i++) // First loop: place all ca_get requests in the buffer
{ Hndl = (int)myDblPr[i];
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Invalid Handle");
RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID));
status = ca_array_get(DBR_DOUBLE,1,CHNLS[Hndl-1].CHID,mxGetPr(plhs[0])+i);
if(status!=ECA_NORMAL)
mexPrintf("Error in call to ca_array_get\n");
}
status = ca_pend_io(MCA_GET_TIMEOUT);
if(status!=ECA_NORMAL)
mexErrMsgTxt("... ca_pend_io call timed out \n");
break;
case 70: // MCAPUT
NumHandles = (nrhs-1)/2;
for(i=0;i<NumHandles;i++)
{ j = 2+i*2;
Hndl = (int)mxGetScalar(prhs[1+i*2]);
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Handle out of range - no values written");
// Set the status to 0 - mcaput_callback will write 1, if successful
CHNLS[Hndl-1].LastPutStatus = 0;
RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID));
Cnt = ca_element_count(CHNLS[Hndl-1].CHID);
// If a value to write is passed as a string - the number of elements to write
// is 1 , NOT the length of the string returned by mxGetNumberOfElements
if(mxIsChar(prhs[j]))
L=1;
else
L = min(mxGetNumberOfElements(prhs[j]),Cnt);
// Copy double or string data from MATLAB prhs[] to DataBuffer
// on each channel
if(RequestType==DBR_STRING)
{ // STRING type is is passed as a cell array of strings
// A a 1-row MATLAB character array (1 string) may also be passed as a value
if(mxIsChar(prhs[j]))
{ mxGetString(prhs[j], StrBuffer, sizeof(dbr_string_t));
strcpy((char*)(*((dbr_string_t*)(CHNLS[Hndl-1].DataBuffer))),StrBuffer);
}
else if(mxIsCell(prhs[j]))
{ for(k=0;k<L;k++)
{ mxGetString(mxGetCell(prhs[j],k), StrBuffer, sizeof(dbr_string_t));
strcpy((char*)(*((dbr_string_t*)(CHNLS[Hndl-1].DataBuffer)+k)),StrBuffer);
}
}
}
else
{ myDblPr = mxGetPr(prhs[j]);
switch(RequestType)
{
case DBR_INT: // As defined in db_access.h DBR_INT = DBR_SHORT = 1
for(k=0;k<L;k++)
*((dbr_short_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_short_t)(myDblPr[k]);
break;
case DBR_FLOAT:
for(k=0;k<L;k++)
*((dbr_float_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_float_t)(myDblPr[k]);
break;
case DBR_ENUM:
for(k=0;k<L;k++)
*((dbr_enum_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_enum_t)(myDblPr[k]);
break;
case DBR_CHAR:
for(k=0;k<L;k++)
*((dbr_char_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_char_t)(myDblPr[k]);
break;
case DBR_LONG:
for(k=0;k<L;k++)
*((dbr_long_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_long_t)(myDblPr[k]);
break;
case DBR_DOUBLE:
for(k=0;k<L;k++)
*((dbr_double_t*)(CHNLS[Hndl-1].DataBuffer)+k) = (dbr_double_t)(myDblPr[k]);
break;
}
}
// place request in the que
status = ca_array_put_callback(RequestType,L,CHNLS[Hndl-1].CHID,CHNLS[Hndl-1].DataBuffer,
mcaput_callback,&(CHNLS[Hndl-1].LastPutStatus));
if(status!=ECA_NORMAL)
mexPrintf("ca_array_put_callback failed\n");
}
status = ca_pend_event(MCA_PUT_TIMEOUT);
plhs[0]=mxCreateDoubleMatrix(1,NumHandles,mxREAL);
myDblPr = mxGetPr(plhs[0]);
for(i=0;i<NumHandles;i++)
{ Hndl = (int)mxGetScalar(prhs[1+i*2]);
myDblPr[i] = (double)CHNLS[Hndl-1].LastPutStatus;
}
break;
case 80: // MCAPUT - fast unconfirmed put for scalar numeric PV's
myDblPr = mxGetPr(prhs[1]);
M = mxGetM(prhs[1]);
N = mxGetN(prhs[1]);
NumHandles = M*N;
plhs[0] = mxCreateDoubleMatrix(M,N,mxREAL);
myDblPr = mxGetPr(plhs[0]);
for(i=0;i<NumHandles;i++)
{ myDblPr = mxGetPr(plhs[0]);
Hndl = (int)(*(mxGetPr(prhs[1])+i));
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Handle out of range - no values written");
status = ca_array_put(DBR_DOUBLE,1,CHNLS[Hndl-1].CHID,mxGetPr(prhs[2])+i);
if(status!=ECA_NORMAL)
{ myDblPr[i] = 0;
//mexPrintf("ca_array_put_callback failed\n");
}
else
{ myDblPr[i] = 1;
}
}
status = ca_pend_io(MCA_PUT_TIMEOUT);
break;
case 100: // MCAMON install Monitor or replace MonitorCBString
Hndl = (int)mxGetScalar(prhs[1]);
// Check if the handle is within range
if(Hndl<1 || Hndl>HandlesUsed)
{ plhs[0]=mxCreateScalarDouble(0);
mexErrMsgTxt("Invalid Handle");
}
if(CHNLS[Hndl-1].EVID) // if VID is not NULL - another monitor is already installed - replace MonitorCBString
{ if(CHNLS[Hndl-1].MonitorCBString) // Free memory for occupied by the old MonitorCBString
{ mxFree(CHNLS[Hndl-1].MonitorCBString);
CHNLS[Hndl-1].MonitorCBString = NULL;
}
if(nrhs>2) // Check if the new string is specified
{ if(mxIsChar(prhs[2]))
{ buflen = mxGetM(prhs[2])*mxGetN(prhs[2])+1;
CHNLS[Hndl-1].MonitorCBString = (char *)mxMalloc(buflen);
mexMakeMemoryPersistent(CHNLS[Hndl-1].MonitorCBString);
mxGetString(prhs[2],CHNLS[Hndl-1].MonitorCBString,buflen);
}
else
mexErrMsgTxt("Third argument must be a string\n");
}
plhs[0]=mxCreateScalarDouble(1);
}
else // No monitor is presently installed;
{ RequestType = dbf_type_to_DBR(ca_field_type(CHNLS[Hndl-1].CHID)); // Closest to the native
if(nrhs>2)
{ if(mxIsChar(prhs[2]))
{ buflen = mxGetM(prhs[2])*mxGetN(prhs[2])+1;
CHNLS[Hndl-1].MonitorCBString = (char *)mxMalloc(buflen);
mexMakeMemoryPersistent(CHNLS[Hndl-1].MonitorCBString);
mxGetString(prhs[2],CHNLS[Hndl-1].MonitorCBString,buflen);
}
else
mexErrMsgTxt("Third argument must be a string\n");
}
else
CHNLS[Hndl-1].MonitorCBString = NULL; // Set MonitorCBString to NULL so that mcaMonitorEventHandler only copies data to CACHE
// Count argument set to 0 - native count
status = ca_add_array_event(RequestType,0,CHNLS[Hndl-1].CHID, mcaMonitorEventHandler, &CHNLS[Hndl-1], 0.0, 0.0, 0.0, &(CHNLS[Hndl-1].EVID));
if(status!=ECA_NORMAL)
{ mexPrintf("ca_add_array_event failed\n");
plhs[0]=mxCreateScalarDouble(0);
}
else
{ ca_poll();
plhs[0]=mxCreateScalarDouble(1);
}
}
break;
case 200: // Clear Monitor MCACLEARMON
Hndl = (int)mxGetScalar(prhs[1]);
if(Hndl<1 || Hndl>HandlesUsed)
mexErrMsgTxt("Invalid Handle");
if(!CHNLS[Hndl-1].EVID)
mexErrMsgTxt("No monitor installed - can not clear");
status = ca_clear_event(CHNLS[Hndl-1].EVID);
if(status!=ECA_NORMAL)
mexPrintf("ca_clear_event failed\n");
// Set the EVID pointer to NULL (ca_clear_event dos not do it by itself)
// to use as a FLAG that no monitors are installed
CHNLS[Hndl-1].EVID = NULL;
// Reset
CHNLS[Hndl-1].MonitorEventCount = 0;
// If there is Callback String - destroy it
if(CHNLS[Hndl-1].MonitorCBString)
{ mxFree(CHNLS[Hndl-1].MonitorCBString);
CHNLS[Hndl-1].MonitorCBString =NULL;
}
break;
case 300: // MCACACHE Get Cached values of a monitored PV
for(i=0;i<nrhs-1;i++)
{ Hndl = (int)mxGetScalar(prhs[1+i]);
// if(Hndl<1 || Hndl>HandlesUsed || !CHNLS[Hndl-1].CACHE)
if(Hndl<1 || Hndl>HandlesUsed)
plhs[i] = mxCreateDoubleMatrix(0,0,mxREAL);
else
{ plhs[i] = mxDuplicateArray(CHNLS[Hndl-1].CACHE);
CHNLS[Hndl-1].MonitorEventCount = 0;
}
}
break;
case 500: // MCAMON Info on installed monitors
L = 0;
HndlArray = (int*)mxCalloc(HandlesUsed,sizeof(int));
for(i=0;i<HandlesUsed;i++) // Count installed monitors
{ if(CHNLS[i].EVID)
HndlArray[L++]=i+1;
}
if(L>0)
{ plhs[0] = mxCreateDoubleMatrix(1,L,mxREAL);
myDblPr = mxGetPr(plhs[0]);
plhs[1] = mxCreateCellMatrix(1,L);
for(i=0;i<L;i++)
{ myDblPr[i] = (double)HndlArray[i];
mxSetCell(plhs[1],i,mxCreateString(CHNLS[HndlArray[i]-1].MonitorCBString));
}
}
else
{ plhs[0] = mxCreateDoubleMatrix(0,0,mxREAL);
plhs[1] = mxCreateCellMatrix(0,0);
}
break;
case 510: // MCAMONEVENTS Event count fot monitors
plhs[0] = mxCreateDoubleMatrix(1,HandlesUsed,mxREAL);
myDblPr = mxGetPr(plhs[0]);
for(i=0;i<HandlesUsed;i++)
myDblPr[i]=(double)(CHNLS[i].MonitorEventCount);
break;
case 1000: // print timeout settings
plhs[0] = mxCreateDoubleMatrix(3,1,mxREAL);
mexPrintf("MCA timeout settings\n:");
mexPrintf("mcaopen\t%f [s]\n", MCA_SEARCH_TIMEOUT );
mexPrintf("mcaget\t%f [s]\n", MCA_GET_TIMEOUT );
mexPrintf("mcaput\t%f [s]\n", MCA_PUT_TIMEOUT );
myDblPr = mxGetPr(plhs[0]);
myDblPr[0] = MCA_SEARCH_TIMEOUT;
myDblPr[1] = MCA_GET_TIMEOUT;
myDblPr[2] = MCA_PUT_TIMEOUT;
break;
case 1001: // set MCA_SEARCH_TIMEOUT
// return delay value
MCA_SEARCH_TIMEOUT = mxGetScalar(prhs[1]);
plhs[0] = mxCreateScalarDouble(MCA_SEARCH_TIMEOUT);
break;
case 1002: // set MCA_GET_TIMEOUT
// return delay value
MCA_GET_TIMEOUT = mxGetScalar(prhs[1]);
plhs[0] = mxCreateScalarDouble(MCA_GET_TIMEOUT);
break;
case 1003: // set MCA_PUT_TIMEOUT
// return delay value
MCA_PUT_TIMEOUT = mxGetScalar(prhs[1]);
plhs[0] = mxCreateScalarDouble(MCA_PUT_TIMEOUT);
break;
}
}
int caget (pv *pvs, int nPvs, OutputT format,
chtype dbrType, unsigned long reqElems)
{
unsigned int i;
int n, result;
for (n = 0; n < nPvs; n++) {
/* Set up pvs structure */
/* -------------------- */
/* Get natural type and array count */
pvs[n].nElems = ca_element_count(pvs[n].chid);
pvs[n].dbfType = ca_field_type(pvs[n].chid);
pvs[n].dbrType = dbrType;
/* Set up value structures */
pvs[n].dbrType = dbf_type_to_DBR_TIME(pvs[n].dbfType); /* Use native type */
if (dbr_type_is_ENUM(pvs[n].dbrType)) /* Enums honour -n option */
{
if (enumAsNr) pvs[n].dbrType = DBR_TIME_INT;
else pvs[n].dbrType = DBR_TIME_STRING;
}
if (reqElems == 0 || pvs[n].nElems < reqElems) /* Adjust array count */
pvs[n].reqElems = pvs[n].nElems;
else
pvs[n].reqElems = reqElems;
/* Issue CA request */
/* ---------------- */
if (ca_state(pvs[n].chid) == cs_conn)
{
nConn++;
pvs[n].onceConnected = 1;
/* Allocate value structure */
pvs[n].value = calloc(1, dbr_size_n(pvs[n].dbrType, pvs[n].reqElems));
if(!pvs[n].value){
fprintf(stderr,"Allocation failed\n");
exit(1);
}
result = ca_array_get(pvs[n].dbrType,
pvs[n].reqElems,
pvs[n].chid,
pvs[n].value);
pvs[n].status = result;
} else {
pvs[n].status = ECA_DISCONN;
}
}
if (!nConn) return 1; /* No connection? We're done. */
/* Wait for completion */
/* ------------------- */
result = ca_pend_io(caTimeout);
if (result == ECA_TIMEOUT)
fprintf(stderr, "Read operation timed out: PV data was not read.\n");
/* Print the data */
/* -------------- */
for (n = 0; n < nPvs; n++) {
switch (format) {
case plain: /* Emulate old caput behaviour */
if (pvs[n].reqElems <= 1 && fieldSeparator == ' ') printf("%-30s", pvs[n].name);
else printf("%s", pvs[n].name);
printf("%c", fieldSeparator);
case terse:
if (pvs[n].status == ECA_DISCONN)
printf("*** not connected\n");
else if (pvs[n].status == ECA_NORDACCESS)
printf("*** no read access\n");
else if (pvs[n].status != ECA_NORMAL)
printf("*** CA error %s\n", ca_message(pvs[n].status));
else if (pvs[n].value == 0)
printf("*** no data available (timeout)\n");
else
{
if (charArrAsStr && dbr_type_is_CHAR(pvs[n].dbrType) && (reqElems || pvs[n].reqElems > 1)) {
dbr_char_t *s = (dbr_char_t*) dbr_value_ptr(pvs[n].value, pvs[n].dbrType);
int dlen = epicsStrnEscapedFromRawSize((char*)s, strlen((char*)s));
char *d = calloc(dlen+1, sizeof(char));
if(!d){
fprintf(stderr,"Allocation failed\n");
exit(1);
}
epicsStrnEscapedFromRaw(d, dlen+1, (char*)s, strlen((char*)s));
printf("%s", d);
free(d);
} else {
if (reqElems || pvs[n].nElems > 1) printf("%lu%c", pvs[n].reqElems, fieldSeparator);
for (i=0; i<pvs[n].reqElems; ++i) {
if (i) printf ("%c", fieldSeparator);
printf("%s", val2str(pvs[n].value, pvs[n].dbrType, i));
}
}
printf("\n");
}
break;
case all:
print_time_val_sts(&pvs[n], reqElems);
break;
default :
break;
}
}
return 0;
}
static void medmUpdateChannelCb(struct event_handler_args args) {
Channel *pCh = (Channel *)ca_puser(args.chid);
Boolean statusChanged = False;
Boolean severityChanged = False;
Boolean zeroAndNoneZeroTransition = False;
Record *pr;
double value;
int nBytes;
int allocBytes;
#if DEBUG_CHANNEL_CB || DEBUG_LARGE_ARRAY
const char *pvname=ca_name(args.chid);
print("medmUpdateChannelCb: %s\n",pvname);
if(args.status != ECA_NORMAL) {
char buf[80];
envGetConfigParam(&EPICS_CA_MAX_ARRAY_BYTES,80,buf);
buf[79]='\0';
print("EPICS_CA_MAX_ARRAY_BYTES: %s\n",buf);
}
#endif
/* Increment the event counter */
caTask.caEventCount++;
/* Check for valid values */
/* Same as for updateGraphicalInfoCb */
/* Don't need to check for read access, checking ECA_NORMAL is enough */
if(globalDisplayListTraversalMode != DL_EXECUTE) return;
if(args.status != ECA_NORMAL) {
medmPostMsg(0,"medmUpdateChannelCb: Bad status [%d] for %s: %s\n",
args.status,
ca_name(args.chid)?ca_name(args.chid):"Name Unknown",
ca_message(args.status));
return;
}
if(!args.dbr) {
medmPostMsg(0,"medmUpdateChannelCb: Invalid data for [%s]\n",
ca_name(args.chid)?ca_name(args.chid):"Name Unknown");
return;
}
if(!pCh || !pCh->chid || !pCh->pr) {
medmPostMsg(0,"medmUpdateChannelCb: "
"Invalid channel information for [%s]\n",
ca_name(args.chid)?ca_name(args.chid):"Name Unknown");
return;
}
if(pCh->chid != args.chid) {
medmPostMsg(0,"medmUpdateChannelCb: chid from args [%x] "
"does not match chid from channel [%x]\n"
" [%s]\n",
args.chid,
pCh->chid,
ca_name(args.chid)?ca_name(args.chid):"Name Unknown");
return;
}
pr = pCh->pr;
/* Allocate space for the data */
nBytes = dbr_size_n(args.type, args.count);
if(!pCh->data) {
/* Allocate maximum space for the variable array data */
if(pr->currentCount == -2) {
allocBytes=dbr_size_n(args.type, pr->elementCount);
} else {
allocBytes=nBytes;
}
/* No previous data, allocate */
pCh->data = (dataBuf *)malloc(allocBytes);
pCh->size = allocBytes;
if(!pCh->data) {
medmPostMsg(1,"medmUpdateChannelCb: Memory allocation error [%s]\n",
ca_name(args.chid)?ca_name(args.chid):"Name Unknown");
return;
}
} else if(pCh->size < nBytes) {
/* Previous data exists but is too small
* Free it and allocate it again */
free((char *)pCh->data);
pCh->data = (dataBuf *)malloc(nBytes);
pCh->size = nBytes;
if(pCh->data == NULL) {
medmPostMsg(1,"medmUpdateChannelCb: Memory reallocation error"
" [%s]\n",
ca_name(args.chid)?ca_name(args.chid):"Name Unknown");
return;
}
}
pr->currentCount=args.count;
#ifdef __USING_TIME_STAMP__
/* Copy the returned time stamp to the Record */
pr->time = ((dataBuf *)args.dbr)->s.stamp;
#endif
/* Set the array pointer in the Record to point to the value member of the
* appropriate struct stored in the Channel
* (The returned data is not stored there yet) */
switch (ca_field_type(args.chid)) {
case DBF_STRING:
pr->array = (XtPointer)pCh->data->s.value;
break;
case DBF_ENUM:
pr->array = (XtPointer)&(pCh->data->e.value);
break;
case DBF_CHAR:
pr->array = (XtPointer)&(pCh->data->c.value);
break;
case DBF_INT:
pr->array = (XtPointer)&(pCh->data->i.value);
break;
case DBF_LONG:
pr->array = (XtPointer)&(pCh->data->l.value);
break;
case DBF_FLOAT:
pr->array = (XtPointer)&(pCh->data->f.value);
break;
case DBF_DOUBLE:
pr->array = (XtPointer)&(pCh->data->d.value);
break;
default:
break;
}
/* For strings and arrays copy the returned data to the Channel
* (The space is allocated but the data is not stored otherwise) */
if(ca_field_type(args.chid) == DBF_STRING ||
ca_element_count(args.chid) > 1) {
memcpy((void *)pCh->data, args.dbr, nBytes);
}
/* Copy the value from the returned data to the Record */
switch (ca_field_type(args.chid)) {
case DBF_STRING:
value = 0.0;
break;
case DBF_ENUM:
value = (double)((dataBuf *)(args.dbr))->e.value;
break;
case DBF_CHAR:
value = (double)((dataBuf *)(args.dbr))->c.value;
break;
case DBF_INT:
value = (double)((dataBuf *)(args.dbr))->i.value;
break;
case DBF_LONG:
value = (double)((dataBuf *)(args.dbr))->l.value;
break;
case DBF_FLOAT:
value = (double)((dataBuf *)(args.dbr))->f.value;
break;
case DBF_DOUBLE:
value = ((dataBuf *)(args.dbr))->d.value;
#if DEBUG_SLIDER
if(value > 150.0 || value < -150.0) {
print("medmUpdateChannelCb: %g\n",value);
}
#endif
break;
default:
value = 0.0;
break;
}
/* Mark zero to nonzero transition */
if(((value == 0.0) && (pr->value != 0.0)) ||
((value != 0.0) && (pr->value == 0.0)))
zeroAndNoneZeroTransition = True;
/* Mark status changed */
if(pr->status != ((dataBuf *)(args.dbr))->d.status) {
pr->status = ((dataBuf *)(args.dbr))->d.status;
statusChanged = True;
}
/* Mark severity changed */
if(pr->severity != ((dataBuf *)(args.dbr))->d.severity) {
pr->severity = ((dataBuf *)(args.dbr))->d.severity;
severityChanged = True;
}
/* Set the new value into the record */
pr->value = value;
#if DEBUG_ERASE
print("medmUpdateChannelCb: [%x]%s %g\n",
pr, pr->name, pr->value);
#endif
/* Call the update value callback if there is a monitored change */
if(pCh->pr->updateValueCb) {
if(pr->monitorValueChanged) {
pr->updateValueCb((XtPointer)pr);
} else if(pr->monitorStatusChanged && statusChanged) {
pr->updateValueCb((XtPointer)pr);
} else if(pr->monitorSeverityChanged && severityChanged) {
pr->updateValueCb((XtPointer)pr);
} else if(pr->monitorZeroAndNoneZeroTransition &&
zeroAndNoneZeroTransition) {
pr->updateValueCb((XtPointer)pr);
}
}
}
PyObject *pv_getter_pvval(pvobject * self, void *closure)
{
if (self->chanId == NULL || ca_state(self->chanId) != cs_conn
|| self->buff == NULL) {
PYCA_ERR("pvval: indef");
}
int i;
dbr_plaintype data;
int dim = ca_element_count(self->chanId);
chtype type = xxx_ca_field_type(self->chanId);
PyObject *returnvalue = NULL;
/* build the returned tuple */
if (dim > 1)
returnvalue = PyTuple_New(dim);
switch (type) {
case DBR_STRING:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyString_FromString(data.s));
} else
returnvalue =
PyString_FromString(((struct dbr_time_string *)
self->buff)->value);
break;
case DBR_DOUBLE:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyFloat_FromDouble(data.d));
} else
returnvalue =
PyFloat_FromDouble(((struct dbr_time_double *)
self->buff)->value);
break;
case DBR_LONG:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyLong_FromLong(data.l));
} else
returnvalue = PyLong_FromLong(((struct dbr_time_long *)
self->buff)->value);
break;
case DBR_SHORT:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyInt_FromLong(data.i));
} else
returnvalue = PyInt_FromLong(((struct dbr_time_short *)
self->buff)->value);
break;
case DBR_CHAR:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyInt_FromLong(data.c));
} else
returnvalue = PyInt_FromLong(((struct dbr_time_char *)
self->buff)->value);
break;
case DBR_ENUM:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyInt_FromLong(data.e));
} else
returnvalue = PyInt_FromLong(((struct dbr_time_enum *)
self->buff)->value);
break;
case DBR_FLOAT:
if (dim > 1)
for (i = 0; i < dim; i++) {
ca_module_utilsextract(self->buff,
xxx_ca_field_type
(self->chanId), i,
&data);
PyTuple_SetItem(returnvalue, i,
PyFloat_FromDouble(data.f));
} else
returnvalue =
PyFloat_FromDouble(((struct dbr_time_float *)
self->buff)->value);
break;
default:
PYCA_ERR("pvval: invalid");
break;
}
return returnvalue;
}
static void dbCaTask(void *arg)
{
taskwdInsert(0, NULL, NULL);
SEVCHK(ca_context_create(ca_enable_preemptive_callback),
"dbCaTask calling ca_context_create");
dbCaClientContext = ca_current_context ();
SEVCHK(ca_add_exception_event(exceptionCallback,NULL),
"ca_add_exception_event");
epicsEventSignal(startStopEvent);
/* channel access event loop */
while (TRUE){
do {
epicsEventMustWait(workListEvent);
} while (dbCaCtl == ctlPause);
while (TRUE) { /* process all requests in workList*/
caLink *pca;
short link_action;
int status;
epicsMutexMustLock(workListLock);
if (!(pca = (caLink *)ellGet(&workList))){ /* Take off list head */
epicsMutexUnlock(workListLock);
if (dbCaCtl == ctlExit) goto shutdown;
break; /* workList is empty */
}
link_action = pca->link_action;
pca->link_action = 0;
if (link_action & CA_CLEAR_CHANNEL) --removesOutstanding;
epicsMutexUnlock(workListLock); /* Give back immediately */
if (link_action & CA_CLEAR_CHANNEL) { /* This must be first */
dbCaLinkFree(pca);
/* No alarm is raised. Since link is changing so what? */
continue; /* No other link_action makes sense */
}
if (link_action & CA_CONNECT) {
status = ca_create_channel(
pca->pvname,connectionCallback,(void *)pca,
CA_PRIORITY_DB_LINKS, &(pca->chid));
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_create_channel %s\n",
ca_message(status));
printLinks(pca);
continue;
}
dbca_chan_count++;
status = ca_replace_access_rights_event(pca->chid,
accessRightsCallback);
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask replace_access_rights_event %s\n",
ca_message(status));
printLinks(pca);
}
continue; /*Other options must wait until connect*/
}
if (ca_state(pca->chid) != cs_conn) continue;
if (link_action & CA_WRITE_NATIVE) {
assert(pca->pputNative);
if (pca->putType == CA_PUT) {
status = ca_array_put(
pca->dbrType, pca->nelements,
pca->chid, pca->pputNative);
} else if (pca->putType==CA_PUT_CALLBACK) {
status = ca_array_put_callback(
pca->dbrType, pca->nelements,
pca->chid, pca->pputNative,
putCallback, pca);
} else {
status = ECA_PUTFAIL;
}
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_array_put %s\n",
ca_message(status));
printLinks(pca);
}
epicsMutexMustLock(pca->lock);
if (status == ECA_NORMAL) pca->newOutNative = FALSE;
epicsMutexUnlock(pca->lock);
}
if (link_action & CA_WRITE_STRING) {
assert(pca->pputString);
if (pca->putType == CA_PUT) {
status = ca_array_put(
DBR_STRING, 1,
pca->chid, pca->pputString);
} else if (pca->putType==CA_PUT_CALLBACK) {
status = ca_array_put_callback(
DBR_STRING, 1,
pca->chid, pca->pputString,
putCallback, pca);
} else {
status = ECA_PUTFAIL;
}
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_array_put %s\n",
ca_message(status));
printLinks(pca);
}
epicsMutexMustLock(pca->lock);
if (status == ECA_NORMAL) pca->newOutString = FALSE;
epicsMutexUnlock(pca->lock);
}
/*CA_GET_ATTRIBUTES before CA_MONITOR so that attributes available
* before the first monitor callback */
if (link_action & CA_GET_ATTRIBUTES) {
status = ca_get_callback(DBR_CTRL_DOUBLE,
pca->chid, getAttribEventCallback, pca);
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_get_callback %s\n",
ca_message(status));
printLinks(pca);
}
}
if (link_action & CA_MONITOR_NATIVE) {
size_t element_size;
element_size = dbr_value_size[ca_field_type(pca->chid)];
epicsMutexMustLock(pca->lock);
pca->pgetNative = dbCalloc(pca->nelements, element_size);
epicsMutexUnlock(pca->lock);
status = ca_add_array_event(
ca_field_type(pca->chid)+DBR_TIME_STRING,
ca_element_count(pca->chid),
pca->chid, eventCallback, pca, 0.0, 0.0, 0.0, 0);
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_add_array_event %s\n",
ca_message(status));
printLinks(pca);
}
}
if (link_action & CA_MONITOR_STRING) {
epicsMutexMustLock(pca->lock);
pca->pgetString = dbCalloc(1, MAX_STRING_SIZE);
epicsMutexUnlock(pca->lock);
status = ca_add_array_event(DBR_TIME_STRING, 1,
pca->chid, eventCallback, pca, 0.0, 0.0, 0.0, 0);
if (status != ECA_NORMAL) {
errlogPrintf("dbCaTask ca_add_array_event %s\n",
ca_message(status));
printLinks(pca);
}
}
}
SEVCHK(ca_flush_io(), "dbCaTask");
}
shutdown:
taskwdRemove(0);
if (dbca_chan_count == 0)
ca_context_destroy();
else
fprintf(stderr, "dbCa: chan_count = %d at shutdown\n", dbca_chan_count);
epicsEventSignal(startStopEvent);
}
static void medmConnectEventCb(struct connection_handler_args args) {
int status;
Channel *pCh = (Channel *)ca_puser(args.chid);
int count;
/* Increment the event counter */
caTask.caEventCount++;
/* Check for valid values */
if(globalDisplayListTraversalMode != DL_EXECUTE) return;
if(!pCh || !pCh->chid || !pCh->pr) {
medmPostMsg(0,"medmConnectEventCb: Invalid channel information\n");
return;
}
/* Do a get every time a channel is connected or reconnected and has
* read access. The get will cause the graphical info callback to
* be called */
if(args.op == CA_OP_CONN_UP && ca_read_access(pCh->chid)) {
status = ca_array_get_callback(
dbf_type_to_DBR_CTRL(ca_field_type(args.chid)),
1, args.chid, medmUpdateGraphicalInfoCb, NULL);
if(status != ECA_NORMAL) {
medmPostMsg(0,"medmConnectEventCb: "
"ca_array_get_callback [%s]:\n %s\n",
ca_name(pCh->chid)?ca_name(pCh->chid):"Unknown",
ca_message(status));
#if DEBUG_CONNECTION
# if 0
system("netstat | grep iocacis");
# endif
print(" pCh->chid %s args.chid\n",
pCh->chid == args.chid?"==":"!=");
print(
" Channel Name: %s\n"
" State: %s\n"
" Native Type: %s\n"
" Native Count: %hu\n"
" Access: %s%s\n"
" IOC: %s\n",
args.chid?ca_name(args.chid):"Unavailable",
args.chid?ca_state(args.chid) == cs_never_conn?"Never":
ca_state(args.chid) == cs_prev_conn?"Prev":
ca_state(args.chid) == cs_conn?"Conn":
ca_state(args.chid) == cs_closed?"Closed":"Unknown":"Unavailable",
args.chid?dbf_type_to_text(ca_field_type(args.chid)):"Unavailable",
args.chid?ca_element_count(args.chid):0,
args.chid?(ca_read_access(args.chid)?"R":"None"):"Unavailable",
args.chid?(ca_write_access(args.chid)?"W":""):"",
args.chid?ca_host_name(args.chid):"Unavailable");
#endif
}
}
/* Handle four cases: connected or not and previously connected or not */
if(args.op == CA_OP_CONN_UP) {
/* Connected */
if(pCh->previouslyConnected == False) {
/* Connected and not previously connected */
/* Set these first so they will be right for the updateValueCb */
pCh->pr->elementCount = ca_element_count(pCh->chid);
pCh->pr->dataType = ca_field_type(args.chid);
pCh->pr->connected = True;
caTask.channelConnected++;
/* Add the access-rights-change callback and the
significant-change (value, alarm or severity)
callback. Don't call the updateValueCb because
ca_replace_access_rights_event will call it. */
status = ca_replace_access_rights_event(
pCh->chid,medmReplaceAccessRightsEventCb);
if(status != ECA_NORMAL) {
medmPostMsg(0,"medmConnectEventCb: "
"ca_replace_access_rights_event [%s]: %s\n",
ca_name(pCh->chid)?ca_name(pCh->chid):"Unknown",
ca_message(status));
}
if(pCh->pr->currentCount == -2) {
count=0;
} else {
count=ca_element_count(pCh->chid);
}
#ifdef __USING_TIME_STAMP__
status = ca_add_array_event(
dbf_type_to_DBR_TIME(ca_field_type(pCh->chid)),
count, pCh->chid,
medmUpdateChannelCb, pCh, 0.0,0.0,0.0, &(pCh->evid));
#else
status = ca_add_array_event(
dbf_type_to_DBR_STS(ca_field_type(pCh->chid)),
count, pCh->chid,
medmUpdateChannelCb, pCh, 0.0,0.0,0.0, &(pCh->evid));
#endif
if(status != ECA_NORMAL) {
/* Set the pointer to NULL in case CA didn't. We don't
want to use it or clear it later. */
#if DEBUG_CONNECTION
if(!pCh->evid) {
print("medmConnectEventCb: ca_add_array_event: \n"
" status[%d] != ECA_NORMAL and pCh->evid != NULL\n",
status);
}
#endif
pCh->evid = NULL;
medmPostMsg(0,"medmConnectEventCb: "
"ca_add_array_event [%s]:\n %s\n",
ca_name(pCh->chid)?ca_name(pCh->chid):"Unknown",
ca_message(status));
#if DEBUG_CONNECTION
# if 0
system("netstat | grep iocacis");
# endif
print(" pCh->chid %s args.chid\n",
pCh->chid == args.chid?"==":"!=");
print(
" Channel Name: %s\n"
" State: %s\n"
" Native Type: %s\n"
" Native Count: %hu\n"
" Access: %s%s\n"
" IOC: %s\n",
args.chid?ca_name(args.chid):"Unavailable",
args.chid?ca_state(args.chid) == cs_never_conn?"Never":
ca_state(args.chid) == cs_prev_conn?"Prev":
ca_state(args.chid) == cs_conn?"Conn":
ca_state(args.chid) == cs_closed?"Closed":"Unknown":"Unavailable",
args.chid?dbf_type_to_text(ca_field_type(args.chid)):"Unavailable",
args.chid?ca_element_count(args.chid):0,
args.chid?(ca_read_access(args.chid)?"R":"None"):"Unavailable",
args.chid?(ca_write_access(args.chid)?"W":""):"",
args.chid?ca_host_name(args.chid):"Unavailable");
#endif
}
/* Set this one last so ca_replace_access_rights_event can
use the old value */
pCh->previouslyConnected = True;
} else {
/* Connected and previously connected */
pCh->pr->connected = True;
caTask.channelConnected++;
if(pCh->pr->updateValueCb)
pCh->pr->updateValueCb((XtPointer)pCh->pr);
}
} else {
/* Not connected */
if(pCh->previouslyConnected == False) {
/* Not connected and not previously connected */
/* Probably doesn't happen -- if CA can't connect, this
* routine never gets called */
pCh->pr->connected = False;
} else {
/* Not connected but previously connected */
pCh->pr->connected = False;
caTask.channelConnected--;
if(pCh->pr->updateValueCb)
pCh->pr->updateValueCb((XtPointer)pCh->pr);
}
}
}
/*
* callback from connection handler: change the state of the channel valid
* flag depending on the connection being up or down.
* ASSUMPTIONS: chan_id is valid.
*/
static void
connect_callback(struct connection_handler_args args)
{
Connector *conp;
Channel *chan = ca_puser( args.chid);
int status;
DEBUGP printf("connect callback %p\n", chan);
switch( args.op)
{
case CA_OP_CONN_UP:
if( chan->initData == 1)
{
chan->maxelement = ca_element_count(chan->chan_id);
chan->chan_type = ca_field_type(chan->chan_id);
chan->initData = 0;
}
/*
* note that a dropped and recreated connection can cause a free and alloc. This
* is not always redundant, as software may have restarted with different sizes
* for the field!
*/
if( chan->createData == 1 )
{
if( chan->dataval)
free( chan->dataval);
chan->dataval = calloc(dbr_size[chan->chan_type], chan->maxelement+1);
}
chan->readAccess = ca_read_access( chan->chan_id);
chan->writeAccess = ca_write_access( chan->chan_id);
status = ca_array_get_callback( dbf_type_to_DBR_CTRL(ca_field_type(chan->chan_id)), 1, chan->chan_id, getChanInfo, (void*)chan);
SEVCHK(status, "connect_callback : ca_get_DBR_CTRL_event failed");
status = ca_replace_access_rights_event( chan->chan_id, getAccessRights);
SEVCHK(status, "connect_callback : ca_replace_access_rights_event failed");
chan->valid = 1;
chan->outstanding = 0;
if( chan->monitor)
{
chan->status = 100; /* MAGIC: an absurd status */
status = ca_add_array_event(dbf_type_to_DBR_STS(chan->chan_type), chan->maxelement, chan->chan_id, monitorCallback, chan,
(double) 0.0, (double) 0.0, (double) 0.0, &(chan->eventId));
SEVCHK(status, "connect_callback : ca_add_event failed");
status = ca_flush_io();
SEVCHK(status, "connect_callback : ca_flush_io failed");
}
break;
case CA_OP_CONN_DOWN:
if( chan->valid && chan->eventId)
ca_clear_event(chan->eventId);
chan->valid = 0;
chan->status = 99;
/*
* update the access rights and severity for all the connectors
*/
for(conp=chan->first_connector; conp ; conp=conp->next)
{
if(conp->newAccess)
(*conp->newAccess)(conp);
if( conp->newState)
(*conp->newState)(conp);
}
break;
default:
break;
}
return;
}
static void connectionCallback(struct connection_handler_args arg)
{
caLink *pca;
short link_action = 0;
struct link *plink;
pca = ca_puser(arg.chid);
assert(pca);
epicsMutexMustLock(pca->lock);
plink = pca->plink;
if (!plink) goto done;
pca->isConnected = (ca_state(arg.chid) == cs_conn);
if (!pca->isConnected) {
struct pv_link *ppv_link = &plink->value.pv_link;
dbCommon *precord = ppv_link->precord;
pca->nDisconnect++;
if (precord &&
((ppv_link->pvlMask & pvlOptCP) ||
((ppv_link->pvlMask & pvlOptCPP) && precord->scan == 0)))
scanOnce(precord);
goto done;
}
pca->hasReadAccess = ca_read_access(arg.chid);
pca->hasWriteAccess = ca_write_access(arg.chid);
if (pca->gotFirstConnection) {
if (pca->nelements != ca_element_count(arg.chid) ||
pca->dbrType != ca_field_type(arg.chid)) {
/* BUG: We have no way to clear any old subscription with the
* originally chosen data type/size. That will continue
* to send us data and will result in an assert() fail.
*/
/* Let next dbCaGetLink and/or dbCaPutLink determine options */
plink->value.pv_link.pvlMask &=
~(pvlOptInpNative | pvlOptInpString |
pvlOptOutNative | pvlOptOutString);
pca->gotInNative = 0;
pca->gotOutNative = 0;
pca->gotInString = 0;
pca->gotOutString = 0;
free(pca->pgetNative); pca->pgetNative = 0;
free(pca->pgetString); pca->pgetString = 0;
free(pca->pputNative); pca->pputNative = 0;
free(pca->pputString); pca->pputString = 0;
}
}
pca->gotFirstConnection = TRUE;
pca->nelements = ca_element_count(arg.chid);
pca->dbrType = ca_field_type(arg.chid);
if ((plink->value.pv_link.pvlMask & pvlOptInpNative) && !pca->pgetNative) {
link_action |= CA_MONITOR_NATIVE;
}
if ((plink->value.pv_link.pvlMask & pvlOptInpString) && !pca->pgetString) {
link_action |= CA_MONITOR_STRING;
}
if ((plink->value.pv_link.pvlMask & pvlOptOutNative) && pca->gotOutNative) {
link_action |= CA_WRITE_NATIVE;
}
if ((plink->value.pv_link.pvlMask & pvlOptOutString) && pca->gotOutString) {
link_action |= CA_WRITE_STRING;
}
pca->gotAttributes = 0;
if (pca->dbrType != DBR_STRING) {
link_action |= CA_GET_ATTRIBUTES;
}
done:
if (link_action) addAction(pca, link_action);
epicsMutexUnlock(pca->lock);
}
void connection_handler ( struct connection_handler_args args )
{
pv *ppv = ( pv * ) ca_puser ( args.chid );
if ( args.op == CA_OP_CONN_UP ) {
int dbrType;
/* Set up pv structure */
/* ------------------- */
/* Get natural type and array count */
ppv->nElems = ca_element_count(ppv->chid);
ppv->dbfType = ca_field_type(ppv->chid);
/* Set up value structures */
dbrType = dbf_type_to_DBR_TIME(ppv->dbfType); /* Use native type */
if (dbr_type_is_ENUM(dbrType)) /* Enums honour -n option */
{
if (enumAsNr) dbrType = DBR_TIME_INT;
else dbrType = DBR_TIME_STRING;
}
else if (floatAsString &&
(dbr_type_is_FLOAT(dbrType) || dbr_type_is_DOUBLE(dbrType)))
{
dbrType = DBR_TIME_STRING;
}
/* Adjust array count */
if (reqElems == 0 || ppv->nElems < reqElems){
ppv->reqElems = ppv->nElems; /* Use full number of points */
} else {
ppv->reqElems = reqElems; /* Limit to specified number */
}
/* Remember dbrType */
ppv->dbrType = dbrType;
ppv->onceConnected = 1;
nConn++;
/* Issue CA request */
/* ---------------- */
/* install monitor once with first connect */
if ( ! ppv->value ) {
/* Allocate value structure */
ppv->value = calloc(1, dbr_size_n(dbrType, ppv->reqElems));
if ( ppv->value ) {
ppv->status = ca_create_subscription(dbrType,
ppv->reqElems,
ppv->chid,
eventMask,
event_handler,
(void*)ppv,
NULL);
if ( ppv->status != ECA_NORMAL ) {
free ( ppv->value );
}
}
}
}
else if ( args.op == CA_OP_CONN_DOWN ) {
nConn--;
ppv->status = ECA_DISCONN;
print_time_val_sts(ppv, ppv->reqElems);
}
}
static void pvInfoWriteInfo(void)
{
time_t now;
struct tm *tblock;
char timeStampStr[TIME_STRING_MAX];
Record *pR;
chid chId;
char *descVal;
#if defined(DBR_CLASS_NAME) && DO_RTYP
char *rtypVal;
#endif
DlElement *pE;
char *elementType;
static char noType[]="Unknown";
struct dbr_time_string timeVal;
char string[1024]; /* Danger: Fixed length */
XmTextPosition curpos = 0;
int i, j;
/* Free the timeout */
if(pvInfoTimerOn) {
XtRemoveTimeOut(pvInfoTimeoutId);
pvInfoTimerOn = False;
}
/* Just clean up and abort if we get called with no pvInfo
* (Shouldn't happen) */
if(!pvInfo) return;
/* Get timestamp */
time(&now);
tblock = localtime(&now);
strftime(timeStampStr, TIME_STRING_MAX, STRFTIME_FORMAT"\n", tblock);
timeStampStr[TIME_STRING_MAX-1]='\0';
/* Get element type */
pE = pvInfoElement;
if(pE &&
pE->type >= MIN_DL_ELEMENT_TYPE && pE->type <= MAX_DL_ELEMENT_TYPE) {
elementType=elementType(pE->type);
} else {
elementType=noType;
}
/* Heading */
sprintf(string, " PV Information\n\nObject: %s\n%s\n",
elementType, timeStampStr);
XmTextSetInsertionPosition(pvInfoMessageBox, 0);
XmTextSetString(pvInfoMessageBox, string);
curpos+=strlen(string);
/* Loop over the records to print information */
for(i=0; i < nPvInfoPvs; i++) {
/* Check for a valid record */
if(!pvInfo[i].pvOk) continue;
chId = pvInfo[i].pvChid;
timeVal = pvInfo[i].timeVal;
pR = pvInfo[i].record;
/* Name */
sprintf(string, "%s\n"
"======================================\n",
ca_name(chId));
/* DESC */
descVal = pvInfo[i].descVal;
if(pvInfo[i].descOk && descVal) {
sprintf(string, "%sDESC: %s\n", string, descVal);
} else {
sprintf(string, "%sDESC: %s\n", string, NOT_AVAILABLE);
}
if(pvInfo[i].descChid) ca_clear_channel(pvInfo[i].descChid);
#if defined(DBR_CLASS_NAME) && DO_RTYP
/* RTYP */
rtypVal = pvInfo[i].rtypVal;
if(pvInfo[i].rtypOk && rtypVal && *rtypVal) {
sprintf(string, "%sRTYP: %s\n", string, rtypVal);
} else {
sprintf(string, "%sRTYP: %s\n", string, NOT_AVAILABLE);
}
#endif
/* Items from chid */
sprintf(string, "%sTYPE: %s\n", string,
dbf_type_to_text(ca_field_type(chId)));
/* ca_element_count is defined differently in 3.14 vs. 3.13 */
sprintf(string, "%sCOUNT: %lu\n", string,
(unsigned long)ca_element_count(chId));
sprintf(string, "%sACCESS: %s%s\n", string,
ca_read_access(chId)?"R":"", ca_write_access(chId)?"W":"");
sprintf(string, "%sIOC: %s\n", string, ca_host_name(chId));
if(timeVal.value) {
char fracPart[10];
/* Do the value */
if(ca_element_count(chId) == 1) {
sprintf(string, "%sVALUE: %s\n", string,
timeVal.value);
} else {
sprintf(string, "%sFIRST VALUE: %s\n", string,
timeVal.value);
}
/* Convert the seconds part of the timestamp to UNIX time */
now = timeVal.stamp.secPastEpoch + 631152000ul;
tblock = localtime(&now);
strftime(timeStampStr, TIME_STRING_MAX, "%a %b %d, %Y %H:%M:%S",
tblock);
timeStampStr[TIME_STRING_MAX-1]='\0';
/* Get the fractional part. This assumes strftime truncates
seconds rather than rounding them, which seems to be the
case. */
sprintf(fracPart, "%09d",timeVal.stamp.nsec);
/* Truncate to 3 figures */
fracPart[3]='\0';
sprintf(timeStampStr,"%s.%s", timeStampStr, fracPart);
timeStampStr[TIME_STRING_MAX-1]='\0';
sprintf(string, "%sSTAMP: %s\n", string, timeStampStr);
#if DEBUG_TIMESTAMP
/* This prints 9 significant figures and requires 3.13 base */
{
char tsTxt[32];
sprintf(string,"%sSTAMP: %s\n",string,
tsStampToText(&timeVal.stamp,TS_TEXT_MONDDYYYY,tsTxt));
}
#endif
} else {
sprintf(string, "%sVALUE: %s\n", string, NOT_AVAILABLE);
sprintf(string, "%sSTAMP: %s\n", string, NOT_AVAILABLE);
}
XmTextInsert(pvInfoMessageBox, curpos, string);
curpos+=strlen(string);
/* Alarms */
switch(pR->severity) {
case NO_ALARM:
sprintf(string, "ALARM: NO\n");
break;
case MINOR_ALARM:
sprintf(string, "ALARM: MINOR\n");
break;
case MAJOR_ALARM:
sprintf(string, "ALARM: MAJOR\n");
break;
case INVALID_ALARM:
sprintf(string, "ALARM: INVALID\n");
break;
default:
sprintf(string, "ALARM: Unknown\n");
break;
}
XmTextInsert(pvInfoMessageBox, curpos, string);
curpos+=strlen(string);
/* Items from record */
sprintf(string, "\n");
switch(ca_field_type(chId)) {
case DBF_STRING:
break;
case DBF_ENUM:
sprintf(string, "%sSTATES: %d\n",
string, (int)(pR->hopr+1.1));
/* KE: Bad way to use a double */
if(pR->hopr) {
for (j=0; j <= pR->hopr; j++) {
sprintf(string, "%sSTATE %2d: %s\n",
string, j, pR->stateStrings[j]);
}
}
break;
case DBF_CHAR:
case DBF_INT:
case DBF_LONG:
sprintf(string, "%sHOPR: %g LOPR: %g\n",
string, pR->hopr, pR->lopr);
break;
case DBF_FLOAT:
case DBF_DOUBLE:
if(pR->precision >= 0 && pR->precision <= 17) {
sprintf(string, "%sPRECISION: %d\n",
string, pR->precision);
} else {
sprintf(string, "%sPRECISION: %d [Bad Value]\n",
string, pR->precision);
}
sprintf(string, "%sHOPR: %g LOPR: %g\n",
string, pR->hopr, pR->lopr);
break;
default:
break;
}
sprintf(string, "%s\n", string);
XmTextInsert(pvInfoMessageBox, curpos, string);
curpos+=strlen(string);
}
/* Pop it up unless we have left EXECUTE mode */
if(globalDisplayListTraversalMode == DL_EXECUTE) {
XtSetSensitive(pvInfoS, True);
XtPopup(pvInfoS, XtGrabNone);
}
/* Free space */
if(pvInfo) free((char *)pvInfo);
pvInfo = NULL;
pvInfoElement = NULL;
}
