Cross Reference: /illumos-gate/usr/src/uts/common/io/eventfd.c

Lines Matching +defs:val +defs:state
35 	kmutex_t efd_lock;			/* lock protecting state */
41 	eventfd_state_t *efd_next;		/* next state on global list */
47 static kmutex_t		eventfd_lock;		/* lock protecting state */
51 static eventfd_state_t	*eventfd_state;		/* global list of state */
57 	eventfd_state_t *state;
75 	state = ddi_get_soft_state(eventfd_softstate, minor);
78 	state->efd_next = eventfd_state;
79 	eventfd_state = state;
90 	eventfd_state_t *state;
92 	uint64_t val, oval;
95 	if (uio->uio_resid < sizeof (val))
98 	state = ddi_get_soft_state(eventfd_softstate, minor);
100 	mutex_enter(&state->efd_lock);
102 	while (state->efd_value == 0) {
104 			mutex_exit(&state->efd_lock);
108 		if (!cv_wait_sig_swap(&state->efd_cv, &state->efd_lock)) {
109 			mutex_exit(&state->efd_lock);
119 	val = oval = state->efd_value;
121 	if (state->efd_semaphore) {
122 		state->efd_value--;
123 		val = 1;
125 		state->efd_value = 0;
128 	err = uiomove(&val, sizeof (val), UIO_READ, uio);
134 	if (state->efd_bwriters != 0) {
135 		cv_broadcast(&state->efd_cv);
137 	mutex_exit(&state->efd_lock);
145 		pollwakeup(&state->efd_pollhd, POLLWRNORM | POLLOUT);
155 	eventfd_state_t *state;
157 	uint64_t val, oval;
160 	if (uio->uio_resid < sizeof (val))
163 	if ((err = uiomove(&val, sizeof (val), UIO_WRITE, uio)) != 0)
166 	if (val > EVENTFD_VALMAX)
169 	state = ddi_get_soft_state(eventfd_softstate, minor);
171 	mutex_enter(&state->efd_lock);
173 	while (val > EVENTFD_VALMAX - state->efd_value) {
175 			mutex_exit(&state->efd_lock);
179 		state->efd_bwriters++;
180 		if (!cv_wait_sig_swap(&state->efd_cv, &state->efd_lock)) {
181 			state->efd_bwriters--;
182 			mutex_exit(&state->efd_lock);
185 		state->efd_bwriters--;
191 	state->efd_value = (oval = state->efd_value) + val;
198 		cv_broadcast(&state->efd_cv);
200 	mutex_exit(&state->efd_lock);
206 		pollwakeup(&state->efd_pollhd, POLLRDNORM | POLLIN);
217 	eventfd_state_t *state;
221 	state = ddi_get_soft_state(eventfd_softstate, minor);
223 	mutex_enter(&state->efd_lock);
225 	if (state->efd_value > 0)
228 	if (state->efd_value < EVENTFD_VALMAX)
232 		*phpp = &state->efd_pollhd;
234 	mutex_exit(&state->efd_lock);
243 	eventfd_state_t *state;
246 	state = ddi_get_soft_state(eventfd_softstate, minor);
250 		mutex_enter(&state->efd_lock);
251 		state->efd_semaphore ^= 1;
252 		mutex_exit(&state->efd_lock);
268 	eventfd_state_t *state, **sp;
271 	state = ddi_get_soft_state(eventfd_softstate, minor);
273 	if (state->efd_pollhd.ph_list != NULL) {
274 		pollwakeup(&state->efd_pollhd, POLLERR);
275 		pollhead_clean(&state->efd_pollhd);
281 	 * Remove our state from our global list.
283 	for (sp = &eventfd_state; *sp != state; sp = &((*sp)->efd_next))
314 		cmn_err(CE_NOTE, "/dev/eventfd failed to create soft state");