common/os/sig.c

1807 	sigqhdr_t *sqh;
1809 	sqh = (sigqhdr_t *)sigqp->sq_backptr;
1810 	ASSERT(sqh);
1812 	mutex_enter(&sqh->sqb_lock);
1813 	sqh->sqb_sent++;
1814 	mutex_exit(&sqh->sqb_lock);
2389 	sigqhdr_t *sqh;
2393 	sqh = kmem_alloc(i, KM_SLEEP);
2394 	sqh->sqb_count = (uchar_t)maxcount;
2395 	sqh->sqb_maxcount = (uchar_t)maxcount;
2396 	sqh->sqb_size = (ushort_t)i;
2397 	sqh->sqb_pexited = 0;
2398 	sqh->sqb_sent = 0;
2399 	sqh->sqb_free = sq = (sigqueue_t *)(sqh + 1);
2406 	cv_init(&sqh->sqb_cv, NULL, CV_DEFAULT, NULL);
2407 	mutex_init(&sqh->sqb_lock, NULL, MUTEX_DEFAULT, NULL);
2408 	return (sqh);
2418 sigqalloc(sigqhdr_t *sqh)
2424 	if (sqh != NULL) {
2425 		mutex_enter(&sqh->sqb_lock);
2426 		if (sqh->sqb_count > 0) {
2427 			sqh->sqb_count--;
2428 			sq = sqh->sqb_free;
2429 			sqh->sqb_free = sq->sq_next;
2430 			mutex_exit(&sqh->sqb_lock);
2432 			sq->sq_backptr = sqh;
2437 			mutex_exit(&sqh->sqb_lock);
2449 	sigqhdr_t *sqh;
2453 	sqh = (sigqhdr_t *)sq->sq_backptr;
2454 	mutex_enter(&sqh->sqb_lock);
2455 	if (sqh->sqb_pexited && sqh->sqb_sent == 1) {
2456 		mutex_exit(&sqh->sqb_lock);
2457 		cv_destroy(&sqh->sqb_cv);
2458 		mutex_destroy(&sqh->sqb_lock);
2459 		kmem_free(sqh, sqh->sqb_size);
2461 		sqh->sqb_count++;
2462 		sqh->sqb_sent--;
2463 		sq->sq_next = sqh->sqb_free;
2465 		sqh->sqb_free = sq;
2466 		cv_signal(&sqh->sqb_cv);
2467 		mutex_exit(&sqh->sqb_lock);
2495 sigqhdrfree(sigqhdr_t *sqh)
2497 	mutex_enter(&sqh->sqb_lock);
2498 	if (sqh->sqb_sent == 0) {
2499 		mutex_exit(&sqh->sqb_lock);
2500 		cv_destroy(&sqh->sqb_cv);
2501 		mutex_destroy(&sqh->sqb_lock);
2502 		kmem_free(sqh, sqh->sqb_size);
2504 		sqh->sqb_pexited = 1;
2505 		mutex_exit(&sqh->sqb_lock);