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fixed priority polarization of event thread

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This commit is contained in:
Jeff Hill
2000-06-12 19:16:19 +00:00
parent 0077b27fe3
commit f4e905be5b
4 changed files with 24 additions and 12 deletions
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7
src/db/dbEvent.c
View File

@@ -945,10 +945,9 @@ LOCAL void event_task (void *pParm)
*/
int epicsShareAPI db_start_events (
dbEventCtx ctx,const char *taskname, void (*init_func)(threadId),
void *init_func_arg, int priority_offset)
void *init_func_arg, unsigned osiPriority )
{
struct event_user *evUser = (struct event_user *) ctx;
int taskpri;
semMutexMustTake (evUser->firstque.writelock);
@@ -961,8 +960,6 @@ int epicsShareAPI db_start_events (
return DB_EVENT_OK;
}
taskpri = threadGetPrioritySelf ();
taskpri -= priority_offset;
evUser->pendexit = FALSE;
evUser->init_func = init_func;
evUser->init_func_arg = init_func_arg;
@@ -970,7 +967,7 @@ int epicsShareAPI db_start_events (
taskname = EVENT_PEND_NAME;
}
evUser->taskid = threadCreate (
taskname, taskpri, threadGetStackSize(threadStackMedium),
taskname, osiPriority, threadGetStackSize(threadStackMedium),
event_task, (void *)evUser);
if (!evUser->taskid) {
semMutexGive (evUser->firstque.writelock);

2
src/db/dbEvent.h
View File

@@ -50,7 +50,7 @@ typedef void EXTRALABORFUNC (void *extralabor_arg);
epicsShareFunc dbEventCtx epicsShareAPI db_init_events (void);
epicsShareFunc int epicsShareAPI db_start_events (
dbEventCtx ctx, const char *taskname, void (*init_func)(void *),
void *init_func_arg, int priority_offset);
void *init_func_arg, unsigned osiPriority );
epicsShareFunc void epicsShareAPI db_close_events (dbEventCtx ctx);
epicsShareFunc void epicsShareAPI db_event_flow_ctrl_mode_on (dbEventCtx ctx);
epicsShareFunc void epicsShareAPI db_event_flow_ctrl_mode_off (dbEventCtx ctx);

13
src/db/dbServiceIO.cpp
View File

@@ -115,7 +115,6 @@ extern "C" void cacAttachClientCtx ( void * pPrivate )
dbEventSubscription dbServiceIO::subscribe ( struct dbAddr &addr, dbSubscriptionIO &subscr, unsigned mask )
{
static const int slightlyHigherPriority = -1;
caClientCtx clientCtx;
dbEventSubscription es;
int status;
@@ -132,10 +131,18 @@ dbEventSubscription dbServiceIO::subscribe ( struct dbAddr &addr, dbSubscription
this->mutex.unlock ();
return 0;
}
unsigned selfPriority = threadGetPrioritySelf ();
unsigned above;
threadBoolStatus tbs = threadLowestPriorityLevelAbove
(selfPriority, &above);
if ( tbs != tbsSuccess ) {
above = selfPriority;
}
status = db_start_events ( this->ctx, "CAC-event",
cacAttachClientCtx, clientCtx, slightlyHigherPriority );
cacAttachClientCtx, clientCtx, above );
if ( status ) {
db_close_events (this->ctx);
db_close_events ( this->ctx );
this->ctx = 0;
return 0;
}