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core: imply current_prio in sched_switch()

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There is no need to supply the current priority to `sched_switch()`,
when this function can easily tell the value of
`active_thread->priority` itself.
This commit is contained in:
René Kijewski 2014-04-25 18:20:42 +02:00
parent f2ee98c285
commit a6fd5bff92
8 changed files with 13 additions and 13 deletions
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7
core/include/sched.h
View File

@ -55,13 +55,12 @@ void sched_set_status(tcb_t *process, unsigned int status);
/**
* @brief Compare thread priorities and yield() (or set
* sched_context_switch_request if in_isr) when other_prio is higher
* (has a lower value) than current_prio
* sched_context_switch_request if inISR()) when other_prio is higher
* (has a lower value) than the current thread's priority
*
* @param[in] current_prio The priority of the current thread
* @param[in] other_prio The priority of the target thread
*/
void sched_switch(uint16_t current_prio, uint16_t other_prio);
void sched_switch(uint16_t other_prio);
/**
* @brief Call context switching at thread exit

2
core/mutex.c
View File

@ -107,7 +107,7 @@ void mutex_unlock(struct mutex_t *mutex)
DEBUG("%s: waking up waiter.\n", process->name);
sched_set_status(process, STATUS_PENDING);
sched_switch(sched_active_thread->priority, process->priority);
sched_switch(process->priority);
}
else {
mutex->val = 0;

5
core/sched.c
View File

@ -173,11 +173,12 @@ void sched_set_status(tcb_t *process, unsigned int status)
process->status = status;
}
void sched_switch(uint16_t current_prio, uint16_t other_prio)
void sched_switch(uint16_t other_prio)
{
int in_isr = inISR();
uint16_t current_prio = sched_active_thread->priority;
DEBUG("%s: %i %i %i\n", sched_active_thread->name, (int)current_prio, (int)other_prio, in_isr);
DEBUG("%s: %" PRIu16 " %" PRIu16 " %i\n", sched_active_thread->name, current_prio, other_prio, in_isr);
if (current_prio >= other_prio) {
if (in_isr) {

2
core/thread.c
View File

@ -86,7 +86,7 @@ int thread_wakeup(int pid)
sched_set_status(other_thread, STATUS_RUNNING);
restoreIRQ(old_state);
sched_switch(sched_active_thread->priority, other_thread->priority);
sched_switch(other_thread->priority);
return 1;
}

2
sys/posix/pthread/pthread.c
View File

@ -158,7 +158,7 @@ int pthread_create(pthread_t *newthread, const pthread_attr_t *attr, void *(*sta
return -1;
}
sched_switch(sched_active_thread->priority, PRIORITY_MAIN);
sched_switch(PRIORITY_MAIN);
return 0;
}

4
sys/posix/pthread/pthread_cond.c
View File

@ -157,7 +157,7 @@ int pthread_cond_signal(struct pthread_cond_t *cond)
restoreIRQ(old_state);
if (other_prio >= 0) {
sched_switch(sched_active_thread->priority, other_prio);
sched_switch(other_prio);
}
return 0;
@ -191,7 +191,7 @@ int pthread_cond_broadcast(struct pthread_cond_t *cond)
restoreIRQ(old_state);
if (other_prio >= 0) {
sched_switch(sched_active_thread->priority, other_prio);
sched_switch(other_prio);
}
return 0;

2
sys/posix/pthread/pthread_rwlock.c
View File

@ -315,6 +315,6 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
mutex_unlock(&rwlock->mutex);
/* yield if a woken up thread had a higher priority */
sched_switch(sched_active_thread->priority, prio);
sched_switch(prio);
return 0;
}

2
sys/posix/semaphore.c
View File

@ -149,7 +149,7 @@ int sem_post(sem_t *sem)
tcb_t *next_process = (tcb_t*) next->data;
DEBUG("%s: waking up %s\n", sched_active_thread->name, next_process->name);
sched_set_status(next_process, STATUS_PENDING);
sched_switch(sched_active_thread->priority, next_process->priority);
sched_switch(next_process->priority);
}
restoreIRQ(old_state);