bsd/net/devtimer.c

31  * - timer source based on <kern/thread_call.h>
97 devtimer_valid(devtimer_ref timer)
99     return (timer->dt_callout != NULL);
103 devtimer_retain(devtimer_ref timer)
105     OSIncrementAtomic(&timer->dt_retain_count);
110 devtimer_invalidate(devtimer_ref timer)
112     devtimer_cancel(timer);
113     timer->dt_arg0 = NULL;
114     if (timer->dt_callout != NULL) {
115 	thread_call_free(timer->dt_callout);
116 	timer->dt_callout = NULL;
122 devtimer_release(devtimer_ref timer)
126     old_retain_count = OSDecrementAtomic(&timer->dt_retain_count);
132 	devtimer_invalidate(timer);
133 	FREE(timer, M_DEVTIMER);
134 	_devtimer_printf("devtimer: timer released\n");
148     devtimer_ref		timer = (devtimer_ref)param0;
150     process_func = timer->dt_process_func;
152 	(*process_func)(timer, devtimer_process_func_event_lock);
154     timeout_func = timer->dt_timeout_func;
156 	timer->dt_timeout_func = NULL;
157 	if (timer->dt_generation == generation) {
158 	    (*timeout_func)(timer->dt_arg0, timer->dt_arg1, timer->dt_arg2);
161     devtimer_release(timer);
163 	(*process_func)(timer, devtimer_process_func_event_unlock);
169 devtimer_arg0(devtimer_ref timer)
171     return (timer->dt_arg0);
177     devtimer_ref	timer;
179     timer = _MALLOC(sizeof(*timer), M_DEVTIMER, M_WAITOK);
180     if (timer == NULL) {
181 	return (timer);
183     bzero(timer, sizeof(*timer));
184     devtimer_retain(timer);
185     timer->dt_callout = thread_call_allocate(devtimer_process, timer);
186     if (timer->dt_callout == NULL) {
188 	devtimer_release(timer);
189 	timer = NULL;
191     timer->dt_process_func = process_func;
192     timer->dt_arg0 = arg0;
193     return (timer);
197 devtimer_set_absolute(devtimer_ref timer,
202     if (timer->dt_callout == NULL) {
203 	printf("devtimer_set_absolute: uninitialized/freed timer\n");
206     devtimer_cancel(timer);
210     timer->dt_timeout_func = timeout_func;
211     timer->dt_arg1 = arg1;
212     timer->dt_arg2 = arg2;
215     timer->dt_generation++;
216     devtimer_retain(timer);
217     thread_call_enter1_delayed(timer->dt_callout,
218 			       &timer->dt_generation,
224 devtimer_set_relative(devtimer_ref timer,
234     devtimer_set_absolute(timer, abs_time, timeout_func, arg1, arg2);
239 devtimer_cancel(devtimer_ref timer)
241     if (timer->dt_timeout_func != NULL) {
242 	timer->dt_timeout_func = NULL;
243 	if (timer->dt_callout != NULL) {
244 	    _devtimer_printf("devtimer: cancelling timer source\n");
245 	    if (thread_call_cancel(timer->dt_callout)) {
246 		devtimer_release(timer);
257 devtimer_enabled(devtimer_ref timer)
259     return (timer->dt_timeout_func != NULL);