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/contrib/bind9/lib/isc/timer_api.c

https://bitbucket.org/freebsd/freebsd-head/
C | 144 lines | 92 code | 36 blank | 16 comment | 18 complexity | a430b90614df272b756c6cd2d97c9fca MD5 | raw file
  1/*
  2 * Copyright (C) 2009  Internet Systems Consortium, Inc. ("ISC")
  3 *
  4 * Permission to use, copy, modify, and/or distribute this software for any
  5 * purpose with or without fee is hereby granted, provided that the above
  6 * copyright notice and this permission notice appear in all copies.
  7 *
  8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 10 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 14 * PERFORMANCE OF THIS SOFTWARE.
 15 */
 16
 17/* $Id: timer_api.c,v 1.4 2009/09/02 23:48:02 tbox Exp $ */
 18
 19#include <config.h>
 20
 21#include <unistd.h>
 22
 23#include <isc/app.h>
 24#include <isc/magic.h>
 25#include <isc/mutex.h>
 26#include <isc/once.h>
 27#include <isc/timer.h>
 28#include <isc/util.h>
 29
 30static isc_mutex_t createlock;
 31static isc_once_t once = ISC_ONCE_INIT;
 32static isc_timermgrcreatefunc_t timermgr_createfunc = NULL;
 33
 34static void
 35initialize(void) {
 36	RUNTIME_CHECK(isc_mutex_init(&createlock) == ISC_R_SUCCESS);
 37}
 38
 39isc_result_t
 40isc_timer_register(isc_timermgrcreatefunc_t createfunc) {
 41	isc_result_t result = ISC_R_SUCCESS;
 42
 43	RUNTIME_CHECK(isc_once_do(&once, initialize) == ISC_R_SUCCESS);
 44
 45	LOCK(&createlock);
 46	if (timermgr_createfunc == NULL)
 47		timermgr_createfunc = createfunc;
 48	else
 49		result = ISC_R_EXISTS;
 50	UNLOCK(&createlock);
 51
 52	return (result);
 53}
 54
 55isc_result_t
 56isc_timermgr_createinctx(isc_mem_t *mctx, isc_appctx_t *actx,
 57			 isc_timermgr_t **managerp)
 58{
 59	isc_result_t result;
 60
 61	LOCK(&createlock);
 62
 63	REQUIRE(timermgr_createfunc != NULL);
 64	result = (*timermgr_createfunc)(mctx, managerp);
 65
 66	UNLOCK(&createlock);
 67
 68	if (result == ISC_R_SUCCESS)
 69		isc_appctx_settimermgr(actx, *managerp);
 70
 71	return (result);
 72}
 73
 74isc_result_t
 75isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
 76	isc_result_t result;
 77
 78	LOCK(&createlock);
 79
 80	REQUIRE(timermgr_createfunc != NULL);
 81	result = (*timermgr_createfunc)(mctx, managerp);
 82
 83	UNLOCK(&createlock);
 84
 85	return (result);
 86}
 87
 88void
 89isc_timermgr_destroy(isc_timermgr_t **managerp) {
 90	REQUIRE(*managerp != NULL && ISCAPI_TIMERMGR_VALID(*managerp));
 91
 92	(*managerp)->methods->destroy(managerp);
 93
 94	ENSURE(*managerp == NULL);
 95}
 96
 97isc_result_t
 98isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type,
 99		 isc_time_t *expires, isc_interval_t *interval,
100		 isc_task_t *task, isc_taskaction_t action, const void *arg,
101		 isc_timer_t **timerp)
102{
103	REQUIRE(ISCAPI_TIMERMGR_VALID(manager));
104
105	return (manager->methods->timercreate(manager, type, expires,
106					      interval, task, action, arg,
107					      timerp));
108}
109
110void
111isc_timer_attach(isc_timer_t *timer, isc_timer_t **timerp) {
112	REQUIRE(ISCAPI_TIMER_VALID(timer));
113	REQUIRE(timerp != NULL && *timerp == NULL);
114
115	timer->methods->attach(timer, timerp);
116
117	ENSURE(*timerp == timer);
118}
119
120void
121isc_timer_detach(isc_timer_t **timerp) {
122	REQUIRE(timerp != NULL && ISCAPI_TIMER_VALID(*timerp));
123
124	(*timerp)->methods->detach(timerp);
125
126	ENSURE(*timerp == NULL);
127}
128
129isc_result_t
130isc_timer_reset(isc_timer_t *timer, isc_timertype_t type,
131		isc_time_t *expires, isc_interval_t *interval,
132		isc_boolean_t purge)
133{
134	REQUIRE(ISCAPI_TIMER_VALID(timer));
135
136	return (timer->methods->reset(timer, type, expires, interval, purge));
137}
138
139isc_result_t
140isc_timer_touch(isc_timer_t *timer) {
141	REQUIRE(ISCAPI_TIMER_VALID(timer));
142
143	return (timer->methods->touch(timer));
144}