acpica/Osd/OsdSynch.c

272 	struct acpi_mutex	*am;
279 	if ((am = malloc(sizeof(*am), M_ACPISEM, M_NOWAIT | M_ZERO)) == NULL)
282 	snprintf(am->am_name, sizeof(am->am_name), "ACPI mutex (%p)", am);
283 	mtx_init(&am->am_lock, am->am_name, NULL, MTX_DEF);
285 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "created %s\n", am->am_name));
287 	*OutHandle = (ACPI_MUTEX)am;
298 	struct acpi_mutex	*am = (struct acpi_mutex *)Handle;
302 	if (am == NULL) {
307 	mtx_lock(&am->am_lock);
309 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "delete %s\n", am->am_name));
311 	if (am->am_waiters > 0) {
313 		    "reset %s, owner %p\n", am->am_name, am->am_owner));
314 		am->am_reset = 1;
315 		wakeup(am);
316 		while (am->am_waiters > 0) {
317 			if (mtx_sleep(&am->am_reset, &am->am_lock,
321 				    am->am_name, am->am_waiters));
322 				mtx_unlock(&am->am_lock);
325 			if (ACPIMTX_AVAIL(am))
328 				    am->am_name, am->am_waiters));
332 				    am->am_name, am->am_owner, am->am_waiters));
336 	mtx_unlock(&am->am_lock);
338 	mtx_destroy(&am->am_lock);
339 	free(am, M_ACPISEM);
345 	struct acpi_mutex	*am = (struct acpi_mutex *)Handle;
351 	if (am == NULL)
354 	mtx_lock(&am->am_lock);
356 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "acquire %s\n", am->am_name));
358 	if (ACPIMTX_OWNED(am)) {
359 		am->am_nested++;
362 		    am->am_name, am->am_nested));
363 		mtx_unlock(&am->am_lock);
369 		if (!ACPIMTX_AVAIL(am))
373 		while (!ACPIMTX_AVAIL(am)) {
374 			am->am_waiters++;
375 			error = mtx_sleep(am, &am->am_lock, PCATCH, "acmtx", 0);
376 			am->am_waiters--;
377 			if (error == EINTR || am->am_reset) {
385 		while (!ACPIMTX_AVAIL(am)) {
387 			am->am_waiters++;
388 			error = mtx_sleep(am, &am->am_lock, PCATCH,
390 			am->am_waiters--;
391 			if (error == EINTR || am->am_reset) {
395 			if (ACPIMTX_AVAIL(am))
406 		am->am_owner = curthread;
408 	mtx_unlock(&am->am_lock);
416 	struct acpi_mutex	*am = (struct acpi_mutex *)Handle;
420 	if (am == NULL) {
426 	mtx_lock(&am->am_lock);
428 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "release %s\n", am->am_name));
430 	if (ACPIMTX_OWNED(am)) {
431 		if (am->am_nested > 0) {
434 			    am->am_name, am->am_nested));
435 			am->am_nested--;
437 			am->am_owner = NULL;
439 		if (ACPIMTX_AVAIL(am))
441 			    "release already available %s\n", am->am_name));
445 			    am->am_name, am->am_owner, am->am_nested));
447 	if (am->am_waiters > 0 && ACPIMTX_AVAIL(am))
448 		wakeup_one(am);
450 	mtx_unlock(&am->am_lock);