system/kernel/sem.cpp

34 #include <thread.h>
74 	queued_thread(Thread *thread, int32 count)
76 		thread(thread),
82 	Thread	*thread;
188 				kprintf(" %" B_PRId32, entry->thread->id);
334 		thread_unblock(entry->thread, B_BAD_SEM_ID);
372 		dprintf("thread %" B_PRId32 " tried to delete kernel semaphore "
445 		"  <last acquirer>    - The thread that last acquired the semaphore.\n"
598 /*!	Forcibly removes a thread from a semaphores wait queue. May have to wake up
600 	Must be called with semaphore lock held. The thread lock must not be held.
618 	// thread.
620 		SpinLocker schedulerLocker(entry->thread->scheduler_lock);
621 		if (thread_is_blocked(entry->thread)) {
622 			// The thread is still waiting. If its count is satisfied, unblock
623 			// it. Otherwise we can't unblock any other thread.
627 			thread_unblock_locked(entry->thread, B_OK);
630 			// The thread is no longer waiting, but still queued, which means
762 		dprintf("thread %" B_PRId32 " tried to acquire kernel semaphore "
786 		Thread *thread = thread_get_current_thread();
788 		TRACE(("switch_sem_etc(id = %ld): block name = %s, thread = %p,"
789 			" name = %s\n", id, sSems[slot].u.used.name, thread, thread->name));
791 		// do a quick check to see if the thread has any pending signals
792 		// this should catch most of the cases where the thread had a signal
793 		SpinLocker schedulerLocker(thread->scheduler_lock);
794 		if (thread_is_interrupted(thread, flags)) {
811 		queued_thread queueEntry(thread, count);
815 		thread_prepare_to_block(thread, flags, THREAD_BLOCK_TYPE_SEMAPHORE,
846 			"thread %ld (%s)\n", id, sSems[slot].u.used.name, thread->id,
847 			thread->name));
903 		dprintf("thread %" B_PRId32 " tried to release kernel semaphore.\n",
945 		SpinLocker schedulerLock(entry->thread->scheduler_lock);
946 		if (thread_is_blocked(entry->thread)) {
947 			// The thread is still waiting. If its count is satisfied,
948 			// unblock it. Otherwise we can't unblock any other thread.
955 			thread_unblock_locked(entry->thread, unblockStatus);
962 			// The thread is no longer waiting, but still queued, which
974 	// If we've unblocked another thread reschedule, if we've not explicitly