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applied small patch to boost priority on sem block

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@547 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
lillo
2002-07-31 20:05:24 +00:00
parent 37eae7179d
commit 8f4dae6773
1 changed files with 5 additions and 0 deletions
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src/kernel/core/sem.c
+5
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@@ -500,9 +500,14 @@ int release_sem_etc(sem_id id, int count, int flags)
// pull off any items in the release queue and put them in the run queue
if (released_threads > 0) {
struct thread *t;
int priority;
GRAB_THREAD_LOCK();
while ((t = thread_dequeue(&release_queue)) != NULL) {
// temporarily place thread in a run queue with high priority to boost it up
priority = t->priority;
t->priority = t->priority >= THREAD_HIGH_PRIORITY ? t->priority : THREAD_HIGH_PRIORITY;
thread_enqueue_run_q(t);
t->priority = priority;
}
if ((flags & B_DO_NOT_RESCHEDULE) == 0) {
thread_resched();