1824 	sigqhdr_t *sqh;  in sigqsend()  local
1826 	sqh = (sigqhdr_t *)sigqp->sq_backptr;  in sigqsend()
1827 	ASSERT(sqh);  in sigqsend()
1829 	mutex_enter(&sqh->sqb_lock);  in sigqsend()
1830 	sqh->sqb_sent++;  in sigqsend()
1831 	mutex_exit(&sqh->sqb_lock);  in sigqsend()
2400 	sigqhdr_t *sqh;  in sigqhdralloc()  local
2410 	sqh = kmem_alloc(i, KM_SLEEP);  in sigqhdralloc()
2411 	sqh->sqb_count = maxcount;  in sigqhdralloc()
2412 	sqh->sqb_maxcount = maxcount;  in sigqhdralloc()
2413 	sqh->sqb_size = i;  in sigqhdralloc()
2414 	sqh->sqb_pexited = 0;  in sigqhdralloc()
2415 	sqh->sqb_sent = 0;  in sigqhdralloc()
2416 	sqh->sqb_free = sq = (sigqueue_t *)(sqh + 1);  in sigqhdralloc()
2423 	cv_init(&sqh->sqb_cv, NULL, CV_DEFAULT, NULL);  in sigqhdralloc()
2424 	mutex_init(&sqh->sqb_lock, NULL, MUTEX_DEFAULT, NULL);  in sigqhdralloc()
2425 	return (sqh);  in sigqhdralloc()
2436 sigqalloc(sigqhdr_t *sqh)  in sigqalloc()  argument
2442 	if (sqh != NULL) {  in sigqalloc()
2443 		mutex_enter(&sqh->sqb_lock);  in sigqalloc()
2444 		if (sqh->sqb_count > 0) {  in sigqalloc()
2445 			sqh->sqb_count--;  in sigqalloc()
2446 			if (sqh->sqb_free == NULL) {  in sigqalloc()
2453 				sq = sqh->sqb_free;  in sigqalloc()
2455 				sqh->sqb_free = sq->sq_next;  in sigqalloc()
2457 			mutex_exit(&sqh->sqb_lock);  in sigqalloc()
2459 			sq->sq_backptr = sqh;  in sigqalloc()
2463 			mutex_exit(&sqh->sqb_lock);  in sigqalloc()
2475 	sigqhdr_t *sqh;  in sigqrel()  local
2479 	sqh = (sigqhdr_t *)sq->sq_backptr;  in sigqrel()
2480 	mutex_enter(&sqh->sqb_lock);  in sigqrel()
2481 	if (sqh->sqb_pexited && sqh->sqb_sent == 1) {  in sigqrel()
2482 		mutex_exit(&sqh->sqb_lock);  in sigqrel()
2483 		cv_destroy(&sqh->sqb_cv);  in sigqrel()
2484 		mutex_destroy(&sqh->sqb_lock);  in sigqrel()
2485 		kmem_free(sqh, sqh->sqb_size);  in sigqrel()
2487 		sqh->sqb_count++;  in sigqrel()
2488 		sqh->sqb_sent--;  in sigqrel()
2489 		sq->sq_next = sqh->sqb_free;  in sigqrel()
2491 		sqh->sqb_free = sq;  in sigqrel()
2492 		cv_signal(&sqh->sqb_cv);  in sigqrel()
2493 		mutex_exit(&sqh->sqb_lock);  in sigqrel()
2521 sigqhdrfree(sigqhdr_t *sqh)  in sigqhdrfree()  argument
2523 	mutex_enter(&sqh->sqb_lock);  in sigqhdrfree()
2524 	if (sqh->sqb_sent == 0) {  in sigqhdrfree()
2525 		mutex_exit(&sqh->sqb_lock);  in sigqhdrfree()
2526 		cv_destroy(&sqh->sqb_cv);  in sigqhdrfree()
2527 		mutex_destroy(&sqh->sqb_lock);  in sigqhdrfree()
2528 		kmem_free(sqh, sqh->sqb_size);  in sigqhdrfree()
2530 		sqh->sqb_pexited = 1;  in sigqhdrfree()
2531 		mutex_exit(&sqh->sqb_lock);  in sigqhdrfree()