VAR_t POSCALL nosRegDel(const char *keyname)
{
REGELEM_t re, rl;
VAR_t i;
posSemaGet(reglist_sema_g);
for (re = reglist_syselem_g[REGTYPE_USER], rl = NULL;
re != NULL; rl = re, re = re->next)
{
if (!IS_DELETED(re))
{
for (i=0; i<NOS_MAX_REGKEYLEN; ++i)
{
if (re->name[i] != keyname[i])
break;
if ((keyname[i] == 0) || (i == NOS_MAX_REGKEYLEN-1))
{
MARK_DELETED(re);
n_remove(re, rl, REGTYPE_USER);
posSemaSignal(reglist_sema_g);
return E_OK;
}
}
}
}
posSemaSignal(reglist_sema_g);
return -E_FAIL;
}
VAR_t POSCALL nosRegQueryElem(NOSREGQHANDLE_t qh, NOSGENERICHANDLE_t *genh,
char* namebuf, VAR_t bufsize)
{
REGQUERY_t rq = (REGQUERY_t) qh;
REGELEM_t re;
VAR_t i;
if ((rq == NULL) || (genh == NULL) || (namebuf == NULL))
return -E_ARG;
posSemaGet(reglist_sema_g);
if (rq->queryElem == NULL)
{
re = reglist_syselem_g[rq->type];
}
else
{
re = rq->queryElem->next;
DEC_REFCOUNT(rq->queryElem, rq->type);
}
for(;;)
{
rq->queryElem = re;
if (re == NULL)
{
posSemaSignal(reglist_sema_g);
return -E_NOMORE;
}
if (IS_VISIBLE(re))
break;
re = re->next;
}
INC_REFCOUNT(re);
*genh = re->handle.generic;
for (i=0; (i < NOS_MAX_REGKEYLEN) &&
(i < (bufsize-1)) && (re->name[i] != 0); ++i)
{
namebuf[i] = re->name[i];
}
namebuf[i] = 0;
posSemaSignal(reglist_sema_g);
return E_OK;
}
void POSCALL nos_regDelSysKey(NOSREGTYPE_t type, NOSGENERICHANDLE_t handle,
REGELEM_t re)
{
REGELEM_t rl = REEUNKNOWN;
posSemaGet(reglist_sema_g);
if (re == NULL)
{
for (re = reglist_syselem_g[type], rl = NULL;
re != NULL; rl = re, re = re->next)
{
if (!IS_DELETED(re) && (re->handle.generic == handle))
break;
}
}
if (re != NULL)
{
if (!IS_DELETED(re))
{
MARK_DELETED(re);
n_remove(re, rl, type);
}
}
posSemaSignal(reglist_sema_g);
}
/* This function is called from up to three tasks.
* The function contains a section of code that is protected
* by a semphore, so that only a maximum number of tasks is allowed
* to execute the code simultanously. In this example program
* the semaphore is initialized to 2, the counter variable will
* count between 1 and 2, and the output is printed by all three
* tasks. Example printout:
* task2: counter = 2
* task3: counter = 1
* task1: counter = 2
* task3: counter = 2
*/
void sharedResource(int tasknbr)
{
INT_t c;
/* wait for shared resource */
posSemaGet(semaphore);
/* --------------------------------------------------- */
/* increment global counter */
posAtomicAdd(&counter, 1);
/* waste some time (this allows other tasks
to enter this section of code, too) */
posTaskSleep(MS(800));
/* Get and print current counter value.
* The counter value shows the number of tasks
* that are currently executing this section of code.
*/
c = posAtomicGet(&counter);
nosPrintf2("task%i: counter = %i\n", tasknbr, c);
/* decrement global counter */
posAtomicSub(&counter, 1);
/* --------------------------------------------------- */
/* quit access to shared resource */
posSemaSignal(semaphore);
}
/* This function is called from two tasks.
* It increments and prints a global counter variable.
* The function uses a semaphore to protect the shared variable,
* so only one task is allowed to modify the variable at the time.
*/
void incrementCounter(int tasknbr)
{
int c;
/* wait for exclusive access to counter variable */
posSemaGet(semaphore);
/* load variable */
c = counter;
/* change copy of variable */
c++;
/* waste some time */
posTaskSleep(MS(800));
/* store changed variable */
counter = c;
/* print some text */
nosPrintf2("task%i: counter = %i\n", tasknbr, counter);
/* quit exclusive access to the counter variable */
posSemaSignal(semaphore);
}
/* This function is executed by the first task.
*/
void task1(void *arg)
{
VAR_t f;
/* avoid compiler warning */
(void) arg;
for(;;) {
f = posFlagGet(flagset, POSFLAG_MODE_GETSINGLE);
nosPrintf("\nfirsttask: going to signal flag %i\n", f);
if(f==1){
incrementCounter(1);
posFlagSet(flagset, 2);
nosPrintf("flag value = %i\n",f);
task2(arg);
}
/* do something here and waste some time */
posTaskSleep(MS(500));
}
posSemaSignal(semaphore);
}
void task2(void *arg)
{
VAR_t f; // flag definition variable
(void) arg;
for(;;) {
// get the flag status
f = posFlagGet(flagset, POSFLAG_MODE_GETSINGLE);
if(f==2){
incrementCounter(2);
}
/* flag status update */
posFlagSet(flagset, 3);
nosPrintf("flag value = %i\n",f);
/* do something here and waste some time */
posTaskSleep(MS(500));
}
// next the task
posSemaSignal(semaphore);
}
/**
* UART transmit interrupt service routine
**/
static void usart_txrdy(void)
{
UDR = tx->buf[tx->tail];
tx->tail = (tx->tail + 1) & (UART_BUF_SIZE - 1);
if (tx->tail == tx->head) DISABLE_TXE_INTERRUPT;
posSemaSignal(tx->lock);
}
/* This is an example of an interrupt service routine.
*/
void softisr(UVAR_t arg)
{
/* Avoid compiler warining. arg is the value
* that was given to the call to posSoftInt.
*/
(void) arg;
/* Do something useful here.
* Note that this function is running at interrupt level,
* that means the ISR is not allowed to block, and it is not
* allowed to call operating system functions that may block.
* The only useful functions that may be called by this
* routine are posSemaSignal, posFlagSet, posSoftInt and
* posMessageAlloc/posMessageSend.
*
* An interrupt service routine must be as short as possible!
* (Please see the bottom halfs as a variant of this example)
*
*/
/* increment interrupt counter */
isrCounter++;
/* signal an event */
posSemaSignal(event);
}
REGELEM_t POSCALL nos_regNewSysKey(NOSREGTYPE_t type, const char* name)
{
REGELEM_t re = NULL;
posSemaGet(reglist_sema_g);
(void) n_newKey(type, name, &re);
posSemaSignal(reglist_sema_g);
return re;
}
VAR_t POSCALL nosGetNameByHandle(NOSGENERICHANDLE_t handle,
char *buffer, VAR_t bufsize,
NOSREGTYPE_t what)
{
NOSREGTYPE_t rt;
REGELEM_t re = NULL;
VAR_t status = -E_NOTFOUND;
VAR_t i;
char c;
posSemaGet(reglist_sema_g);
if (what != REGTYPE_SEARCHALL)
{
if (what <= MAX_REGTYPE)
{
re = n_findKeyByHandle(what, handle);
}
else
{
status = -E_ARG;
}
}
else
for (rt = MIN_REGTYPE; rt <= MAX_REGTYPE; ++rt)
{
#if NOSCFG_FEATURE_USERREG
if (rt != REGTYPE_USER)
#endif
{
re = n_findKeyByHandle(rt, handle);
if (re != NULL)
break;
}
}
if (re != NULL)
{
if (IS_VISIBLE(re))
{
status = E_OK;
if ((buffer != NULL) && (bufsize > 0))
{
for (i=0; (i<bufsize-1) && (i<NOS_MAX_REGKEYLEN); ++i)
{
c = re->name[i];
if (c == 0) break;
buffer[i] = c;
}
buffer[i] = 0;
}
}
}
posSemaSignal(reglist_sema_g);
return status;
}
static int sockWrite(UosFile* file, const char* data, int len)
{
P_ASSERT("sockWrite", file->fs->cf == &netFSConf);
NetSock* sock = (NetSock*)file->fsPriv;
posMutexLock(sock->mutex);
if (sock->state == NET_SOCK_PEER_CLOSED) {
posMutexUnlock(sock->mutex);
return NET_SOCK_EOF;
}
if (sock->state == NET_SOCK_PEER_ABORTED) {
posMutexUnlock(sock->mutex);
return NET_SOCK_ABORT;
}
P_ASSERT("sockWrite", sock->state == NET_SOCK_BUSY);
sock->state = NET_SOCK_WRITING;
sock->buf = (void*)data;
sock->len = len;
dataToSend = 1;
posSemaSignal(uipGiant);
while (sock->state == NET_SOCK_WRITING) {
posMutexUnlock(sock->mutex);
posFlagGet(sock->uipChange, POSFLAG_MODE_GETMASK);
posMutexLock(sock->mutex);
}
if (sock->state == NET_SOCK_PEER_CLOSED)
len = NET_SOCK_EOF;
else if (sock->state == NET_SOCK_PEER_ABORTED)
len = NET_SOCK_ABORT;
else {
P_ASSERT("sockWrite", sock->state == NET_SOCK_WRITE_OK);
sock->state = NET_SOCK_BUSY;
}
posMutexUnlock(sock->mutex);
return len;
}
void POSCALL nosRegQueryEnd(NOSREGQHANDLE_t qh)
{
REGQUERY_t rq = (REGQUERY_t) qh;
if (rq != NULL)
{
if (rq->queryElem != NULL)
{
posSemaGet(reglist_sema_g);
DEC_REFCOUNT(rq->queryElem, rq->type);
posSemaSignal(reglist_sema_g);
}
nosMemFree(rq);
}
}
static void uart_rx(void)
{
uint8_t ch;
ch = UDR;
if (rx->full) {
/* TODO: Handle Serious buffer
* Overflow problem. Currently
* discarding rx data */
return ;
}
rx->buf[rx->head] = ch;
rx->head = (rx->head + 1) & (UART_BUF_SIZE - 1);
posSemaSignal(rx->lock);
if (rx->head == rx->tail) rx->full = 1;
}
NOSGENERICHANDLE_t POSCALL nosGetHandleByName(NOSREGTYPE_t objtype,
const char *objname)
{
REGELEM_t re;
if ((objtype > MAX_REGTYPE) || (objname ==NULL))
return NULL;
if (n_strlen(objname) > NOS_MAX_REGKEYLEN)
return NULL;
posSemaGet(reglist_sema_g);
re = n_findKeyByName(objtype, objname);
posSemaSignal(reglist_sema_g);
if (re == NULL)
return NULL;
return IS_VISIBLE(re) ? re->handle.generic : NULL;
}
VAR_t POSCALL nosRegGet(const char *keyname, KEYVALUE_t *keyvalue)
{
REGELEM_t re;
if ((keyname == NULL) || (keyvalue == NULL))
return -E_ARG;
posSemaGet(reglist_sema_g);
re = n_findKeyByName(REGTYPE_USER, keyname);
if (re != NULL)
{
if (IS_VISIBLE(re)) {
*keyvalue = re->handle.ukv;
} else {
re = NULL;
}
}
posSemaSignal(reglist_sema_g);
return (re == NULL) ? -E_FAIL : E_OK;
}
static int sockClose(UosFile* file)
{
P_ASSERT("sockWrite", file->fs->cf == &netFSConf);
NetSock* sock = (NetSock*)file->fsPriv;
posMutexLock(sock->mutex);
if (sock->state == NET_SOCK_BUSY) {
sock->state = NET_SOCK_CLOSE;
dataToSend = 1;
posSemaSignal(uipGiant);
while (sock->state == NET_SOCK_CLOSE) {
posMutexUnlock(sock->mutex);
posFlagGet(sock->uipChange, POSFLAG_MODE_GETMASK);
posMutexLock(sock->mutex);
}
}
if (sock->state == NET_SOCK_LISTENING) {
posMutexLock(uipMutex);
uip_unlisten(sock->port);
posMutexUnlock(uipMutex);
sock->port = 0;
sock->state = NET_SOCK_CLOSE_OK;
}
P_ASSERT("CloseState", (sock->state == NET_SOCK_PEER_CLOSED ||
sock->state == NET_SOCK_PEER_ABORTED ||
sock->state == NET_SOCK_CLOSE_OK));
netSockFree(file);
return 0;
}
void task3(void *arg)
{
VAR_t f;
(void) arg;
for(;;) {
f = posFlagGet(flagset, POSFLAG_MODE_GETSINGLE);
if(f==3){
incrementCounter(3);
}
posFlagSet(flagset, 1);
nosPrintf("flag value = %i\n",f);
posTaskSleep(MS(500));
}
posSemaSignal(semaphore);
}
/* This function is called from two tasks.
* It increments and prints a global counter variable.
* The function uses a semaphore to protect the shared variable,
* so only one task is allowed to modify the variable at the time.
*/
void incrementCounter(int tasknbr) {
/* temporary variable */
int c;
posSemaGet(semaphore);
/* get the variable value*/
c = counter;
/* increase the temporary variable*/
c++;
/* wait the 500ms */
posTaskSleep(MS(500));
/* swap the variables */
counter = c;
/* print the status */
nosPrintf("task%i: counter = %i\n", tasknbr, counter);
/* flag state change control */
if(tasknbr == taskCount){
tasknbr = 1;
}
int tempOfIndexValue = tasknbr;
tempOfIndexValue = tempOfIndexValue+1;
/* flag updated */
posFlagSet(flagset, tempOfIndexValue);
/* next the semaphore */
posSemaSignal(semaphore);
}
VAR_t POSCALL nosRegSet(const char *keyname, KEYVALUE_t keyvalue)
{
REGELEM_t re;
VAR_t status = E_OK;
if (keyname == NULL)
return -E_ARG;
posSemaGet(reglist_sema_g);
re = n_findKeyByName(REGTYPE_USER, keyname);
if (re == NULL)
{
status = n_newKey(REGTYPE_USER, keyname, &re);
}
if (status == E_OK)
{
re->handle.ukv = keyvalue;
MARK_VISIBLE(re);
}
posSemaSignal(reglist_sema_g);
return status;
}
static void task_semas(void *arg)
{
static INT_t cntr = 0;
char buf[5];
buf[1] = 'S';
buf[2] = (char) ((int)arg);
buf[3] = ' ';
buf[4] = '\0';
(void) arg;
for (;;)
{
/* try to get semaphore */
posSemaGet(sema_g);
cntr++;
/* sleep one second */
posTaskSleep(HZ);
/* print information, how many tasks are in this function */
buf[0] = '0' + (char) cntr;
print(buf);
if ((cntr < 1) || (cntr > 2))
{
print("SEMAPHORE-ERROR");
}
cntr--;
/* release semaphore again */
posSemaSignal(sema_g);
}
}
/*
* Set a semaphore.
*/
wwd_result_t host_rtos_set_semaphore(host_semaphore_type_t* semaphore, wiced_bool_t fromISR)
{
P_ASSERT("fromISR / posInInterrupt_g mismatch.", (fromISR == 0) == (posInInterrupt_g == 0));
posSemaSignal(*semaphore);
return WWD_SUCCESS;
}
void netInterrupt()
{
posSemaSignal(uipGiant);
}
void netEnableDevicePolling(UINT_t ticks)
{
pollTicks = ticks;
posSemaSignal(uipGiant);
}