acpica/Osd/OsdSynch.c

81 	struct acpi_sema	*as;
88 	if ((as = malloc(sizeof(*as), M_ACPISEM, M_NOWAIT | M_ZERO)) == NULL)
91 	snprintf(as->as_name, sizeof(as->as_name), "ACPI sema (%p)", as);
92 	mtx_init(&as->as_lock, as->as_name, NULL, MTX_DEF);
93 	cv_init(&as->as_cv, as->as_name);
94 	as->as_maxunits = MaxUnits;
95 	as->as_units = InitialUnits;
97 	*OutHandle = (ACPI_SEMAPHORE)as;
100 	    as->as_name, MaxUnits, InitialUnits));
108 	struct acpi_sema	*as = (struct acpi_sema *)Handle;
112 	if (as == NULL)
115 	mtx_lock(&as->as_lock);
117 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "delete %s\n", as->as_name));
119 	if (as->as_waiters > 0) {
122 		    as->as_name, as->as_units, as->as_waiters));
123 		as->as_reset = 1;
124 		cv_broadcast(&as->as_cv);
125 		while (as->as_waiters > 0) {
126 			if (mtx_sleep(&as->as_reset, &as->as_lock,
130 				    as->as_name, as->as_waiters));
131 				mtx_unlock(&as->as_lock);
136 			    as->as_name, as->as_units, as->as_waiters));
140 	mtx_unlock(&as->as_lock);
142 	mtx_destroy(&as->as_lock);
143 	cv_destroy(&as->as_cv);
144 	free(as, M_ACPISEM);
154 	struct acpi_sema	*as = (struct acpi_sema *)Handle;
160 	if (as == NULL || Units == 0)
163 	mtx_lock(&as->as_lock);
167 	    Units, as->as_name, as->as_units, as->as_waiters, Timeout));
169 	if (as->as_maxunits != ACPI_NO_UNIT_LIMIT && as->as_maxunits < Units) {
170 		mtx_unlock(&as->as_lock);
176 		if (!ACPISEM_AVAIL(as, Units))
180 		while (!ACPISEM_AVAIL(as, Units)) {
181 			as->as_waiters++;
182 			error = cv_wait_sig(&as->as_cv, &as->as_lock);
183 			as->as_waiters--;
184 			if (error == EINTR || as->as_reset) {
192 		while (!ACPISEM_AVAIL(as, Units)) {
194 			as->as_waiters++;
195 			error = cv_timedwait_sig(&as->as_cv, &as->as_lock, tmo);
196 			as->as_waiters--;
197 			if (error == EINTR || as->as_reset) {
201 			if (ACPISEM_AVAIL(as, Units))
212 		as->as_units -= Units;
214 	mtx_unlock(&as->as_lock);
222 	struct acpi_sema	*as = (struct acpi_sema *)Handle;
227 	if (as == NULL || Units == 0)
230 	mtx_lock(&as->as_lock);
234 	    Units, as->as_name, as->as_units, as->as_waiters));
236 	if (as->as_maxunits != ACPI_NO_UNIT_LIMIT &&
237 	    (as->as_maxunits < Units ||
238 	    as->as_maxunits - Units < as->as_units)) {
240 		    "exceeded max units %u\n", as->as_maxunits));
241 		mtx_unlock(&as->as_lock);
245 	as->as_units += Units;
246 	if (as->as_waiters > 0 && ACPISEM_AVAIL(as, Units))
248 			cv_signal(&as->as_cv);
250 	mtx_unlock(&as->as_lock);