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completed pthread_setschedparam.

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This commit is contained in:
Joel Sherrill
1996-06-06 15:32:49 +00:00
parent ebd40c0638
commit 65a5c1b192
2 changed files with 266 additions and 152 deletions
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209
cpukit/posix/src/pthread.c
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@@ -40,6 +40,60 @@ const pthread_attr_t _POSIX_Threads_Default_attributes = {
1 /* cputime_clock_allowed */
};
/*PAGE
*
* _POSIX_Threads_Sporadic_budget_TSR
*/
void _POSIX_Threads_Sporadic_budget_TSR(
Objects_Id id,
void *argument
)
{
Thread_Control *the_thread;
POSIX_API_Control *api;
the_thread = argument;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
the_thread->cpu_time_budget =
_POSIX_Timespec_to_interval( &api->schedparam.ss_initial_budget );
_Thread_Change_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.sched_priority )
);
_Watchdog_Insert_ticks(
&api->Sporadic_timer,
_POSIX_Timespec_to_interval( &api->schedparam.ss_replenish_period )
);
}
/*PAGE
*
* _POSIX_Threads_Sporadic_budget_callout
*/
void _POSIX_Threads_Sporadic_budget_callout(
Thread_Control *the_thread
)
{
POSIX_API_Control *api;
/* XXX really should be based on MAX_U32 */
api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
the_thread->cpu_time_budget = 0xFFFFFFFF;
_Thread_Change_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.ss_low_priority )
);
}
/*PAGE
*
* _POSIX_Threads_Create_extension
@@ -421,16 +475,58 @@ int pthread_setschedparam(
struct sched_param *param
)
{
register Thread_Control *the_thread;
POSIX_API_Control *api;
Objects_Locations location;
register Thread_Control *the_thread;
POSIX_API_Control *api;
Thread_CPU_budget_algorithms budget_algorithm;
Thread_CPU_budget_algorithm_callout budget_callout;
Objects_Locations location;
/*
* Check all the parameters
*/
if ( !param )
return EINVAL;
/* XXX need to reschedule after doing this to the thread */
/* XXX need to have one routine called by create and here */
#warning "pthread_setschedparam needs work"
if ( !_POSIX_Priority_Is_valid( param->sched_priority ) )
return EINVAL;
budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
budget_callout = NULL;
switch ( policy ) {
case SCHED_OTHER:
budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE;
break;
case SCHED_FIFO:
budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
break;
case SCHED_RR:
budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE;
break;
case SCHED_SPORADIC:
budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
budget_callout = _POSIX_Threads_Sporadic_budget_callout;
if ( _POSIX_Timespec_to_interval( &param->ss_replenish_period ) <
_POSIX_Timespec_to_interval( &param->ss_initial_budget ) )
return EINVAL;
if ( !_POSIX_Priority_Is_valid( param->ss_low_priority ) )
return EINVAL;
break;
default:
return EINVAL;
}
/*
* Actually change the scheduling policy and parameters
*/
the_thread = _POSIX_Threads_Get( thread, &location );
switch ( location ) {
@@ -438,23 +534,33 @@ int pthread_setschedparam(
case OBJECTS_REMOTE:
return ESRCH;
case OBJECTS_LOCAL:
switch ( policy ) {
case SCHED_OTHER:
case SCHED_FIFO:
case SCHED_RR:
case SCHED_SPORADIC:
/* XXX this is where the interpretation work should go */
break;
default:
_Thread_Enable_dispatch();
return EINVAL;
}
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( api->schedpolicy == SCHED_SPORADIC )
(void) _Watchdog_Remove( &api->Sporadic_timer );
api->schedpolicy = policy;
api->schedparam = *param;
the_thread->budget_algorithm = budget_algorithm;
the_thread->budget_callout = budget_callout;
switch ( api->schedpolicy ) {
case SCHED_OTHER:
case SCHED_FIFO:
case SCHED_RR:
the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
_Thread_Change_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.sched_priority )
);
break;
case SCHED_SPORADIC:
_POSIX_Threads_Sporadic_budget_TSR( 0, the_thread );
break;
}
_Thread_Enable_dispatch();
return 0;
}
@@ -605,60 +711,6 @@ int pthread_attr_setdetachstate(
}
}
/*PAGE
*
* _POSIX_Threads_Sporadic_budget_TSR
*/
void _POSIX_Threads_Sporadic_budget_TSR(
Objects_Id id,
void *argument
)
{
Thread_Control *the_thread;
POSIX_API_Control *api;
the_thread = argument;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
the_thread->cpu_time_budget =
_POSIX_Timespec_to_interval( &api->schedparam.ss_initial_budget );
_Thread_Change_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.sched_priority )
);
_Watchdog_Insert_ticks(
&api->Sporadic_timer,
_POSIX_Timespec_to_interval( &api->schedparam.ss_replenish_period )
);
}
/*PAGE
*
* _POSIX_Threads_Sporadic_budget_callout
*/
void _POSIX_Threads_Sporadic_budget_callout(
Thread_Control *the_thread
)
{
POSIX_API_Control *api;
/* XXX really should be based on MAX_U32 */
api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
the_thread->cpu_time_budget = 0xFFFFFFFF;
_Thread_Change_priority(
the_thread,
_POSIX_Priority_To_core( api->schedparam.ss_low_priority )
);
}
/*PAGE
*
* 16.1.2 Thread Creation, P1003.1c/Draft 10, p. 144
@@ -775,6 +827,9 @@ int pthread_create(
return EINVAL;
break;
default:
return EINVAL;
}
/*
@@ -997,6 +1052,9 @@ void pthread_exit(
while ( (the_thread = _Thread_queue_Dequeue( &api->Join_List )) )
*(void **)the_thread->Wait.return_argument = value_ptr;
if ( api->schedpolicy == SCHED_SPORADIC )
(void) _Watchdog_Remove( &api->Sporadic_timer );
/* XXX run _POSIX_Keys_Run_destructors here? */
_POSIX_Threads_Free( executing );
@@ -1017,6 +1075,8 @@ pthread_t pthread_self( void )
/*PAGE
*
* 16.1.7 Compare Thread IDs, p1003.1c/Draft 10, p. 153
*
* NOTE: POSIX does not define the behavior when either thread id is invalid.
*/
int pthread_equal(
@@ -1027,9 +1087,6 @@ int pthread_equal(
int status;
Objects_Locations location;
/* XXX may want to do a "get" to make sure both are valid. */
/* XXX behavior is undefined if not valid pthread_t's */
/*
* By default this is not a match.
*/