/*
* When a client needs to be terminated then the file descriptors for
* its input/output are simply closed. This leads to a graceful
* degradation, but may take some time when the client is busy. A more
* forcefull method is to kill the client thread, but this may leave
* locks and semaphores in an undesirable state.
*
* The routine freeClient ends a single client session, but through side
* effects of sharing IO descriptors, also its children. Conversely, a
* child can not close a parent.
*/
void
MCfreeClient(Client c)
{
c->mode = FINISHCLIENT;
#ifdef MAL_CLIENT_DEBUG
fprintf(stderr,"# Free client %d\n", c->idx);
#endif
MCexitClient(c);
/* scope list and curprg can not be removed, because the client may
* reside in a quit() command. Therefore the scopelist is re-used.
*/
c->scenario = NULL;
if (c->prompt)
GDKfree(c->prompt);
c->prompt = NULL;
c->promptlength = -1;
if (c->errbuf) {
/* no client threads in embedded mode */
#ifndef HAVE_EMBEDDED
GDKsetbuf(0);
#endif
if (c->father == NULL)
GDKfree(c->errbuf);
c->errbuf = 0;
}
if (c->usermodule)
freeModule(c->usermodule);
c->usermodule = c->curmodule = 0;
c->father = 0;
c->login = c->lastcmd = 0;
//c->active = 0;
c->qtimeout = 0;
c->stimeout = 0;
c->user = oid_nil;
if( c->username){
GDKfree(c->username);
c->username = 0;
}
c->mythread = 0;
if (c->glb) {
freeStack(c->glb);
c->glb = NULL;
}
if( c->error_row){
BBPrelease(c->error_row->batCacheid);
BBPrelease(c->error_fld->batCacheid);
BBPrelease(c->error_msg->batCacheid);
BBPrelease(c->error_input->batCacheid);
c->error_row = c->error_fld = c->error_msg = c->error_input = NULL;
}
if( c->wlc)
freeMalBlk(c->wlc);
c->wlc_kind = 0;
c->wlc = NULL;
MT_sema_destroy(&c->s);
c->mode = MCshutdowninprogress()? BLOCKCLIENT: FREECLIENT;
}
/*
* At the end of the server session all remaining structured are
* explicitly released to simplify detection of memory leakage problems.
*/
void
MCcleanupClients(void)
{
Client c;
for (c = mal_clients; c < mal_clients + MAL_MAXCLIENTS; c++) {
if (c->prompt) {
GDKfree(c->prompt);
c->prompt = NULL;
}
c->user = oid_nil;
assert(c->bak == NULL);
MCexitClient(c);
}
}
/*
* When a client needs to be terminated then the file descriptors for
* its input/output are simply closed. This leads to a graceful
* degradation, but may take some time when the client is busy. A more
* forcefull method is to kill the client thread, but this may leave
* locks and semaphores in an undesirable state.
*
* The routine freeClient ends a single client session, but through side
* effects of sharing IO descriptors, also its children. Conversely, a
* child can not close a parent.
*/
void
freeClient(Client c)
{
Thread t = c->mythread;
c->mode = FINISHCLIENT;
#ifdef MAL_CLIENT_DEBUG
printf("# Free client %d\n", c->idx);
#endif
MCexitClient(c);
/* scope list and curprg can not be removed, because the client may
* reside in a quit() command. Therefore the scopelist is re-used.
*/
c->scenario = NULL;
if (c->prompt)
GDKfree(c->prompt);
c->prompt = NULL;
c->promptlength = -1;
if (c->errbuf) {
GDKsetbuf(0);
if (c->father == NULL)
GDKfree(c->errbuf);
c->errbuf = 0;
}
c->father = 0;
c->login = c->lastcmd = 0;
//c->active = 0;
c->qtimeout = 0;
c->stimeout = 0;
c->user = oid_nil;
if( c->username){
GDKfree(c->username);
c->username = 0;
}
c->mythread = 0;
GDKfree(c->glb);
c->glb = NULL;
if( c->error_row){
BBPdecref(c->error_row->batCacheid,TRUE);
BBPdecref(c->error_fld->batCacheid,TRUE);
BBPdecref(c->error_msg->batCacheid,TRUE);
BBPdecref(c->error_input->batCacheid,TRUE);
c->error_row = c->error_fld = c->error_msg = c->error_input = NULL;
}
if (t)
THRdel(t); /* you may perform suicide */
MT_sema_destroy(&c->s);
c->mode = MCshutdowninprogress()? BLOCKCLIENT: FREECLIENT;
}
/*
* When a client needs to be terminated then the file descriptors for
* its input/output are simply closed. This leads to a graceful
* degradation, but may take some time when the client is busy. A more
* forcefull method is to kill the client thread, but this may leave
* locks and semaphores in an undesirable state.
*
* The routine freeClient ends a single client session, but through side
* effects of sharing IO descriptors, also its children. Conversely, a
* child can not close a parent.
*/
void
freeClient(Client c)
{
Thread t = c->mythread;
c->mode = FINISHING;
#ifdef MAL_CLIENT_DEBUG
printf("# Free client %d\n", c->idx);
#endif
MCexitClient(c);
/* scope list and curprg can not be removed, because the client may
* reside in a quit() command. Therefore the scopelist is re-used.
*/
c->scenario = NULL;
if (c->prompt)
GDKfree(c->prompt);
c->prompt = NULL;
c->promptlength = -1;
if (c->errbuf) {
GDKsetbuf(0);
if (c->father == NULL)
GDKfree(c->errbuf);
c->errbuf = 0;
}
c->father = 0;
c->login = c->lastcmd = 0;
c->qtimeout = 0;
c->stimeout = 0;
if (c->rcc) {
GDKfree(c->rcc);
c->rcc = NULL;
}
c->user = oid_nil;
c->mythread = 0;
c->mode = FREECLIENT;
GDKfree(c->glb);
c->glb = NULL;
if (t)
THRdel(t); /* you may perform suicide */
}
