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-rw-r--r--contrib/bind9/lib/isc/timer.c346
1 files changed, 241 insertions, 105 deletions
diff --git a/contrib/bind9/lib/isc/timer.c b/contrib/bind9/lib/isc/timer.c
index 634268831dec..ab89cddaf8fb 100644
--- a/contrib/bind9/lib/isc/timer.c
+++ b/contrib/bind9/lib/isc/timer.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004, 2005, 2007-2009 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004, 2005, 2007-2009, 2011 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1998-2002 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: timer.c,v 1.84.58.4 2009-01-23 23:47:21 tbox Exp $ */
+/* $Id: timer.c,v 1.95.302.1.2.1 2011-06-02 23:47:36 tbox Exp $ */
/*! \file */
@@ -34,9 +34,22 @@
#include <isc/timer.h>
#include <isc/util.h>
-#ifndef ISC_PLATFORM_USETHREADS
+#ifdef OPENSSL_LEAKS
+#include <openssl/err.h>
+#endif
+
+/* See task.c about the following definition: */
+#ifdef BIND9
+#ifdef ISC_PLATFORM_USETHREADS
+#define USE_TIMER_THREAD
+#else
+#define USE_SHARED_MANAGER
+#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* BIND9 */
+
+#ifndef USE_TIMER_THREAD
#include "timer_p.h"
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
#ifdef ISC_TIMER_TRACE
#define XTRACE(s) fprintf(stderr, "%s\n", (s))
@@ -58,10 +71,13 @@
#define TIMER_MAGIC ISC_MAGIC('T', 'I', 'M', 'R')
#define VALID_TIMER(t) ISC_MAGIC_VALID(t, TIMER_MAGIC)
-struct isc_timer {
+typedef struct isc__timer isc__timer_t;
+typedef struct isc__timermgr isc__timermgr_t;
+
+struct isc__timer {
/*! Not locked. */
- unsigned int magic;
- isc_timermgr_t * manager;
+ isc_timer_t common;
+ isc__timermgr_t * manager;
isc_mutex_t lock;
/*! Locked by timer lock. */
unsigned int references;
@@ -75,45 +91,119 @@ struct isc_timer {
void * arg;
unsigned int index;
isc_time_t due;
- LINK(isc_timer_t) link;
+ LINK(isc__timer_t) link;
};
#define TIMER_MANAGER_MAGIC ISC_MAGIC('T', 'I', 'M', 'M')
#define VALID_MANAGER(m) ISC_MAGIC_VALID(m, TIMER_MANAGER_MAGIC)
-struct isc_timermgr {
+struct isc__timermgr {
/* Not locked. */
- unsigned int magic;
+ isc_timermgr_t common;
isc_mem_t * mctx;
isc_mutex_t lock;
/* Locked by manager lock. */
isc_boolean_t done;
- LIST(isc_timer_t) timers;
+ LIST(isc__timer_t) timers;
unsigned int nscheduled;
isc_time_t due;
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
isc_condition_t wakeup;
isc_thread_t thread;
-#else /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
+#ifdef USE_SHARED_MANAGER
unsigned int refs;
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_SHARED_MANAGER */
isc_heap_t * heap;
};
-#ifndef ISC_PLATFORM_USETHREADS
+/*%
+ * The followings can be either static or public, depending on build
+ * environment.
+ */
+
+#ifdef BIND9
+#define ISC_TIMERFUNC_SCOPE
+#else
+#define ISC_TIMERFUNC_SCOPE static
+#endif
+
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_create(isc_timermgr_t *manager, isc_timertype_t type,
+ isc_time_t *expires, isc_interval_t *interval,
+ isc_task_t *task, isc_taskaction_t action, const void *arg,
+ isc_timer_t **timerp);
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_reset(isc_timer_t *timer, isc_timertype_t type,
+ isc_time_t *expires, isc_interval_t *interval,
+ isc_boolean_t purge);
+ISC_TIMERFUNC_SCOPE isc_timertype_t
+isc__timer_gettype(isc_timer_t *timer);
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_touch(isc_timer_t *timer);
+ISC_TIMERFUNC_SCOPE void
+isc__timer_attach(isc_timer_t *timer0, isc_timer_t **timerp);
+ISC_TIMERFUNC_SCOPE void
+isc__timer_detach(isc_timer_t **timerp);
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp);
+ISC_TIMERFUNC_SCOPE void
+isc__timermgr_poke(isc_timermgr_t *manager0);
+ISC_TIMERFUNC_SCOPE void
+isc__timermgr_destroy(isc_timermgr_t **managerp);
+
+static struct isc__timermethods {
+ isc_timermethods_t methods;
+
+ /*%
+ * The following are defined just for avoiding unused static functions.
+ */
+#ifndef BIND9
+ void *gettype;
+#endif
+} timermethods = {
+ {
+ isc__timer_attach,
+ isc__timer_detach,
+ isc__timer_reset,
+ isc__timer_touch
+ }
+#ifndef BIND9
+ ,
+ (void *)isc__timer_gettype
+#endif
+};
+
+static struct isc__timermgrmethods {
+ isc_timermgrmethods_t methods;
+#ifndef BIND9
+ void *poke; /* see above */
+#endif
+} timermgrmethods = {
+ {
+ isc__timermgr_destroy,
+ isc__timer_create
+ }
+#ifndef BIND9
+ ,
+ (void *)isc__timermgr_poke
+#endif
+};
+
+#ifdef USE_SHARED_MANAGER
/*!
- * If threads are not in use, there can be only one.
+ * If the manager is supposed to be shared, there can be only one.
*/
-static isc_timermgr_t *timermgr = NULL;
-#endif /* ISC_PLATFORM_USETHREADS */
+static isc__timermgr_t *timermgr = NULL;
+#endif /* USE_SHARED_MANAGER */
static inline isc_result_t
-schedule(isc_timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
+schedule(isc__timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
isc_result_t result;
- isc_timermgr_t *manager;
+ isc__timermgr_t *manager;
isc_time_t due;
int cmp;
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
isc_boolean_t timedwait;
#endif
@@ -123,13 +213,13 @@ schedule(isc_timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
REQUIRE(timer->type != isc_timertype_inactive);
-#ifndef ISC_PLATFORM_USETHREADS
+#ifndef USE_TIMER_THREAD
UNUSED(signal_ok);
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
manager = timer->manager;
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
/*!
* If the manager was timed wait, we may need to signal the
* manager to force a wakeup.
@@ -199,7 +289,7 @@ schedule(isc_timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
* the current "next" timer. We do this either by waking up the
* run thread, or explicitly setting the value in the manager.
*/
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
/*
* This is a temporary (probably) hack to fix a bug on tru64 5.1
@@ -232,19 +322,19 @@ schedule(isc_timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
"signal (schedule)"));
SIGNAL(&manager->wakeup);
}
-#else /* ISC_PLATFORM_USETHREADS */
+#else /* USE_TIMER_THREAD */
if (timer->index == 1 &&
isc_time_compare(&timer->due, &manager->due) < 0)
manager->due = timer->due;
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
return (ISC_R_SUCCESS);
}
static inline void
-deschedule(isc_timer_t *timer) {
+deschedule(isc__timer_t *timer) {
isc_boolean_t need_wakeup = ISC_FALSE;
- isc_timermgr_t *manager;
+ isc__timermgr_t *manager;
/*
* The caller must ensure locking.
@@ -258,20 +348,20 @@ deschedule(isc_timer_t *timer) {
timer->index = 0;
INSIST(manager->nscheduled > 0);
manager->nscheduled--;
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
if (need_wakeup) {
XTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_TIMER,
ISC_MSG_SIGNALDESCHED,
"signal (deschedule)"));
SIGNAL(&manager->wakeup);
}
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
}
}
static void
-destroy(isc_timer_t *timer) {
- isc_timermgr_t *manager = timer->manager;
+destroy(isc__timer_t *timer) {
+ isc__timermgr_t *manager = timer->manager;
/*
* The caller must ensure it is safe to destroy the timer.
@@ -291,17 +381,19 @@ destroy(isc_timer_t *timer) {
isc_task_detach(&timer->task);
DESTROYLOCK(&timer->lock);
- timer->magic = 0;
+ timer->common.impmagic = 0;
+ timer->common.magic = 0;
isc_mem_put(manager->mctx, timer, sizeof(*timer));
}
-isc_result_t
-isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type,
- isc_time_t *expires, isc_interval_t *interval,
- isc_task_t *task, isc_taskaction_t action, const void *arg,
- isc_timer_t **timerp)
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_create(isc_timermgr_t *manager0, isc_timertype_t type,
+ isc_time_t *expires, isc_interval_t *interval,
+ isc_task_t *task, isc_taskaction_t action, const void *arg,
+ isc_timer_t **timerp)
{
- isc_timer_t *timer;
+ isc__timermgr_t *manager = (isc__timermgr_t *)manager0;
+ isc__timer_t *timer;
isc_result_t result;
isc_time_t now;
@@ -382,7 +474,9 @@ isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type,
return (result);
}
ISC_LINK_INIT(timer, link);
- timer->magic = TIMER_MAGIC;
+ timer->common.impmagic = TIMER_MAGIC;
+ timer->common.magic = ISCAPI_TIMER_MAGIC;
+ timer->common.methods = (isc_timermethods_t *)&timermethods;
LOCK(&manager->lock);
@@ -401,25 +495,27 @@ isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type,
UNLOCK(&manager->lock);
if (result != ISC_R_SUCCESS) {
- timer->magic = 0;
+ timer->common.impmagic = 0;
+ timer->common.magic = 0;
DESTROYLOCK(&timer->lock);
isc_task_detach(&timer->task);
isc_mem_put(manager->mctx, timer, sizeof(*timer));
return (result);
}
- *timerp = timer;
+ *timerp = (isc_timer_t *)timer;
return (ISC_R_SUCCESS);
}
-isc_result_t
-isc_timer_reset(isc_timer_t *timer, isc_timertype_t type,
- isc_time_t *expires, isc_interval_t *interval,
- isc_boolean_t purge)
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_reset(isc_timer_t *timer0, isc_timertype_t type,
+ isc_time_t *expires, isc_interval_t *interval,
+ isc_boolean_t purge)
{
+ isc__timer_t *timer = (isc__timer_t *)timer0;
isc_time_t now;
- isc_timermgr_t *manager;
+ isc__timermgr_t *manager;
isc_result_t result;
/*
@@ -489,8 +585,9 @@ isc_timer_reset(isc_timer_t *timer, isc_timertype_t type,
return (result);
}
-isc_timertype_t
-isc_timer_gettype(isc_timer_t *timer) {
+ISC_TIMERFUNC_SCOPE isc_timertype_t
+isc__timer_gettype(isc_timer_t *timer0) {
+ isc__timer_t *timer = (isc__timer_t *)timer0;
isc_timertype_t t;
REQUIRE(VALID_TIMER(timer));
@@ -502,8 +599,9 @@ isc_timer_gettype(isc_timer_t *timer) {
return (t);
}
-isc_result_t
-isc_timer_touch(isc_timer_t *timer) {
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timer_touch(isc_timer_t *timer0) {
+ isc__timer_t *timer = (isc__timer_t *)timer0;
isc_result_t result;
isc_time_t now;
@@ -532,8 +630,10 @@ isc_timer_touch(isc_timer_t *timer) {
return (result);
}
-void
-isc_timer_attach(isc_timer_t *timer, isc_timer_t **timerp) {
+ISC_TIMERFUNC_SCOPE void
+isc__timer_attach(isc_timer_t *timer0, isc_timer_t **timerp) {
+ isc__timer_t *timer = (isc__timer_t *)timer0;
+
/*
* Attach *timerp to timer.
*/
@@ -545,12 +645,12 @@ isc_timer_attach(isc_timer_t *timer, isc_timer_t **timerp) {
timer->references++;
UNLOCK(&timer->lock);
- *timerp = timer;
+ *timerp = (isc_timer_t *)timer;
}
-void
-isc_timer_detach(isc_timer_t **timerp) {
- isc_timer_t *timer;
+ISC_TIMERFUNC_SCOPE void
+isc__timer_detach(isc_timer_t **timerp) {
+ isc__timer_t *timer;
isc_boolean_t free_timer = ISC_FALSE;
/*
@@ -558,7 +658,7 @@ isc_timer_detach(isc_timer_t **timerp) {
*/
REQUIRE(timerp != NULL);
- timer = *timerp;
+ timer = (isc__timer_t *)*timerp;
REQUIRE(VALID_TIMER(timer));
LOCK(&timer->lock);
@@ -575,11 +675,11 @@ isc_timer_detach(isc_timer_t **timerp) {
}
static void
-dispatch(isc_timermgr_t *manager, isc_time_t *now) {
+dispatch(isc__timermgr_t *manager, isc_time_t *now) {
isc_boolean_t done = ISC_FALSE, post_event, need_schedule;
isc_timerevent_t *event;
isc_eventtype_t type = 0;
- isc_timer_t *timer;
+ isc__timer_t *timer;
isc_result_t result;
isc_boolean_t idle;
@@ -693,13 +793,13 @@ dispatch(isc_timermgr_t *manager, isc_time_t *now) {
}
}
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
static isc_threadresult_t
#ifdef _WIN32 /* XXXDCL */
WINAPI
#endif
run(void *uap) {
- isc_timermgr_t *manager = uap;
+ isc__timermgr_t *manager = uap;
isc_time_t now;
isc_result_t result;
@@ -732,13 +832,17 @@ run(void *uap) {
}
UNLOCK(&manager->lock);
+#ifdef OPENSSL_LEAKS
+ ERR_remove_state(0);
+#endif
+
return ((isc_threadresult_t)0);
}
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
static isc_boolean_t
sooner(void *v1, void *v2) {
- isc_timer_t *t1, *t2;
+ isc__timer_t *t1, *t2;
t1 = v1;
t2 = v2;
@@ -752,7 +856,7 @@ sooner(void *v1, void *v2) {
static void
set_index(void *what, unsigned int index) {
- isc_timer_t *timer;
+ isc__timer_t *timer;
timer = what;
REQUIRE(VALID_TIMER(timer));
@@ -760,9 +864,9 @@ set_index(void *what, unsigned int index) {
timer->index = index;
}
-isc_result_t
-isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
- isc_timermgr_t *manager;
+ISC_TIMERFUNC_SCOPE isc_result_t
+isc__timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
+ isc__timermgr_t *manager;
isc_result_t result;
/*
@@ -771,19 +875,21 @@ isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
REQUIRE(managerp != NULL && *managerp == NULL);
-#ifndef ISC_PLATFORM_USETHREADS
+#ifdef USE_SHARED_MANAGER
if (timermgr != NULL) {
timermgr->refs++;
- *managerp = timermgr;
+ *managerp = (isc_timermgr_t *)timermgr;
return (ISC_R_SUCCESS);
}
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_SHARED_MANAGER */
manager = isc_mem_get(mctx, sizeof(*manager));
if (manager == NULL)
return (ISC_R_NOMEMORY);
- manager->magic = TIMER_MANAGER_MAGIC;
+ manager->common.impmagic = TIMER_MANAGER_MAGIC;
+ manager->common.magic = ISCAPI_TIMERMGR_MAGIC;
+ manager->common.methods = (isc_timermgrmethods_t *)&timermgrmethods;
manager->mctx = NULL;
manager->done = ISC_FALSE;
INIT_LIST(manager->timers);
@@ -803,7 +909,7 @@ isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
return (result);
}
isc_mem_attach(mctx, &manager->mctx);
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
if (isc_condition_init(&manager->wakeup) != ISC_R_SUCCESS) {
isc_mem_detach(&manager->mctx);
DESTROYLOCK(&manager->lock);
@@ -828,30 +934,33 @@ isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp) {
ISC_MSG_FAILED, "failed"));
return (ISC_R_UNEXPECTED);
}
-#else /* ISC_PLATFORM_USETHREADS */
+#endif
+#ifdef USE_SHARED_MANAGER
manager->refs = 1;
timermgr = manager;
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_SHARED_MANAGER */
- *managerp = manager;
+ *managerp = (isc_timermgr_t *)manager;
return (ISC_R_SUCCESS);
}
-void
-isc_timermgr_poke(isc_timermgr_t *manager) {
-#ifdef ISC_PLATFORM_USETHREADS
+ISC_TIMERFUNC_SCOPE void
+isc__timermgr_poke(isc_timermgr_t *manager0) {
+#ifdef USE_TIMER_THREAD
+ isc__timermgr_t *manager = (isc__timermgr_t *)manager0;
+
REQUIRE(VALID_MANAGER(manager));
SIGNAL(&manager->wakeup);
#else
- UNUSED(manager);
+ UNUSED(manager0);
#endif
}
-void
-isc_timermgr_destroy(isc_timermgr_t **managerp) {
- isc_timermgr_t *manager;
+ISC_TIMERFUNC_SCOPE void
+isc__timermgr_destroy(isc_timermgr_t **managerp) {
+ isc__timermgr_t *manager;
isc_mem_t *mctx;
/*
@@ -859,34 +968,37 @@ isc_timermgr_destroy(isc_timermgr_t **managerp) {
*/
REQUIRE(managerp != NULL);
- manager = *managerp;
+ manager = (isc__timermgr_t *)*managerp;
REQUIRE(VALID_MANAGER(manager));
LOCK(&manager->lock);
-#ifndef ISC_PLATFORM_USETHREADS
- if (manager->refs > 1) {
- manager->refs--;
+#ifdef USE_SHARED_MANAGER
+ manager->refs--;
+ if (manager->refs > 0) {
UNLOCK(&manager->lock);
*managerp = NULL;
return;
}
+ timermgr = NULL;
+#endif /* USE_SHARED_MANAGER */
- isc__timermgr_dispatch();
-#endif /* ISC_PLATFORM_USETHREADS */
+#ifndef USE_TIMER_THREAD
+ isc__timermgr_dispatch((isc_timermgr_t *)manager);
+#endif
REQUIRE(EMPTY(manager->timers));
manager->done = ISC_TRUE;
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
XTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_TIMER,
ISC_MSG_SIGNALDESTROY, "signal (destroy)"));
SIGNAL(&manager->wakeup);
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
UNLOCK(&manager->lock);
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
/*
* Wait for thread to exit.
*/
@@ -895,39 +1007,63 @@ isc_timermgr_destroy(isc_timermgr_t **managerp) {
"isc_thread_join() %s",
isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
ISC_MSG_FAILED, "failed"));
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
/*
* Clean up.
*/
-#ifdef ISC_PLATFORM_USETHREADS
+#ifdef USE_TIMER_THREAD
(void)isc_condition_destroy(&manager->wakeup);
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
DESTROYLOCK(&manager->lock);
isc_heap_destroy(&manager->heap);
- manager->magic = 0;
+ manager->common.impmagic = 0;
+ manager->common.magic = 0;
mctx = manager->mctx;
isc_mem_put(mctx, manager, sizeof(*manager));
isc_mem_detach(&mctx);
*managerp = NULL;
+
+#ifdef USE_SHARED_MANAGER
+ timermgr = NULL;
+#endif
}
-#ifndef ISC_PLATFORM_USETHREADS
+#ifndef USE_TIMER_THREAD
isc_result_t
-isc__timermgr_nextevent(isc_time_t *when) {
- if (timermgr == NULL || timermgr->nscheduled == 0)
+isc__timermgr_nextevent(isc_timermgr_t *manager0, isc_time_t *when) {
+ isc__timermgr_t *manager = (isc__timermgr_t *)manager0;
+
+#ifdef USE_SHARED_MANAGER
+ if (manager == NULL)
+ manager = timermgr;
+#endif
+ if (manager == NULL || manager->nscheduled == 0)
return (ISC_R_NOTFOUND);
- *when = timermgr->due;
+ *when = manager->due;
return (ISC_R_SUCCESS);
}
void
-isc__timermgr_dispatch(void) {
+isc__timermgr_dispatch(isc_timermgr_t *manager0) {
+ isc__timermgr_t *manager = (isc__timermgr_t *)manager0;
isc_time_t now;
- if (timermgr == NULL)
+
+#ifdef USE_SHARED_MANAGER
+ if (manager == NULL)
+ manager = timermgr;
+#endif
+ if (manager == NULL)
return;
TIME_NOW(&now);
- dispatch(timermgr, &now);
+ dispatch(manager, &now);
}
-#endif /* ISC_PLATFORM_USETHREADS */
+#endif /* USE_TIMER_THREAD */
+
+#ifdef USE_TIMERIMPREGISTER
+isc_result_t
+isc__timer_register() {
+ return (isc_timer_register(isc__timermgr_create));
+}
+#endif
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