#acupoftea - mail.ontime-ae.com

System	:	Linux server1.ontime-gulf.com 4.18.0-553.5.1.el8_10.x86_64 #1 SMP Wed Jun 5 09:12:13 EDT 2024 x86_64
Software	:	Apache
Server	:	162.0.230.206
Domains	:	40 Domain
Permission	:	[ drwxr-xr-x ]
	:	/ usr / include / bind9 / isc /

216.73.216.49

Home

File timer.h

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef ISC_TIMER_H
#define ISC_TIMER_H 1

/*****
 ***** Module Info
 *****/

/*! \file isc/timer.h
 * \brief Provides timers which are event sources in the task system.
 *
 * Three types of timers are supported:
 *
 *\li	'ticker' timers generate a periodic tick event.
 *
 *\li	'once' timers generate an idle timeout event if they are idle for too
 *	long, and generate a life timeout event if their lifetime expires.
 *	They are used to implement both (possibly expiring) idle timers and
 *	'one-shot' timers.
 *
 *\li	'limited' timers generate a periodic tick event until they reach
 *	their lifetime when they generate a life timeout event.
 *
 *\li	'inactive' timers generate no events.
 *
 * Timers can change type.  It is typical to create a timer as
 * an 'inactive' timer and then change it into a 'ticker' or
 * 'once' timer.
 *
 *\li MP:
 *	The module ensures appropriate synchronization of data structures it
 *	creates and manipulates.
 *	Clients of this module must not be holding a timer's task's lock when
 *	making a call that affects that timer.  Failure to follow this rule
 *	can result in deadlock.
 *	The caller must ensure that isc_timermgr_destroy() is called only
 *	once for a given manager.
 *
 * \li Reliability:
 *	No anticipated impact.
 *
 * \li Resources:
 *	TBS
 *
 * \li Security:
 *	No anticipated impact.
 *
 * \li Standards:
 *	None.
 */

/***
 *** Imports
 ***/

#include <stdbool.h>

#include <isc/types.h>
#include <isc/event.h>
#include <isc/eventclass.h>
#include <isc/lang.h>
#include <isc/time.h>

ISC_LANG_BEGINDECLS

/***
 *** Types
 ***/

/*% Timer Type */
typedef enum {
	isc_timertype_undefined = -1,	/*%< Undefined */
	isc_timertype_ticker = 0, 	/*%< Ticker */
	isc_timertype_once = 1, 	/*%< Once */
	isc_timertype_limited = 2, 	/*%< Limited */
	isc_timertype_inactive = 3 	/*%< Inactive */
} isc_timertype_t;

typedef struct isc_timerevent {
	struct isc_event	common;
	isc_time_t		due;
} isc_timerevent_t;

#define ISC_TIMEREVENT_FIRSTEVENT	(ISC_EVENTCLASS_TIMER + 0)
#define ISC_TIMEREVENT_TICK		(ISC_EVENTCLASS_TIMER + 1)
#define ISC_TIMEREVENT_IDLE		(ISC_EVENTCLASS_TIMER + 2)
#define ISC_TIMEREVENT_LIFE		(ISC_EVENTCLASS_TIMER + 3)
#define ISC_TIMEREVENT_LASTEVENT	(ISC_EVENTCLASS_TIMER + 65535)

/*% Timer and timer manager methods */
typedef struct {
	void		(*destroy)(isc_timermgr_t **managerp);
	isc_result_t	(*timercreate)(isc_timermgr_t *manager,
				       isc_timertype_t type,
				       const isc_time_t *expires,
				       const isc_interval_t *interval,
				       isc_task_t *task,
				       isc_taskaction_t action,
				       void *arg,
				       isc_timer_t **timerp);
} isc_timermgrmethods_t;

typedef struct {
	void		(*attach)(isc_timer_t *timer, isc_timer_t **timerp);
	void		(*detach)(isc_timer_t **timerp);
	isc_result_t	(*reset)(isc_timer_t *timer, isc_timertype_t type,
				 const isc_time_t *expires,
				 const isc_interval_t *interval,
				 bool purge);
	isc_result_t	(*touch)(isc_timer_t *timer);
} isc_timermethods_t;

/*%
 * This structure is actually just the common prefix of a timer manager
 * object implementation's version of an isc_timermgr_t.
 * \brief
 * Direct use of this structure by clients is forbidden.  timer implementations
 * may change the structure.  'magic' must be ISCAPI_TIMERMGR_MAGIC for any
 * of the isc_timer_ routines to work.  timer implementations must maintain
 * all timer invariants.
 */
struct isc_timermgr {
	unsigned int		impmagic;
	unsigned int		magic;
	isc_timermgrmethods_t	*methods;
};

#define ISCAPI_TIMERMGR_MAGIC		ISC_MAGIC('A','t','m','g')
#define ISCAPI_TIMERMGR_VALID(m)	((m) != NULL && \
					 (m)->magic == ISCAPI_TIMERMGR_MAGIC)

/*%
 * This is the common prefix of a timer object.  The same note as
 * that for the timermgr structure applies.
 */
struct isc_timer {
	unsigned int		impmagic;
	unsigned int		magic;
	isc_timermethods_t	*methods;
};

#define ISCAPI_TIMER_MAGIC	ISC_MAGIC('A','t','m','r')
#define ISCAPI_TIMER_VALID(s)	((s) != NULL && \
				 (s)->magic == ISCAPI_TIMER_MAGIC)

/***
 *** Timer and Timer Manager Functions
 ***
 *** Note: all Ensures conditions apply only if the result is success for
 *** those functions which return an isc_result_t.
 ***/

isc_result_t
isc_timer_create(isc_timermgr_t *manager,
		 isc_timertype_t type,
		 const isc_time_t *expires,
		 const isc_interval_t *interval,
		 isc_task_t *task,
		 isc_taskaction_t action,
		 void *arg,
		 isc_timer_t **timerp);
/*%<
 * Create a new 'type' timer managed by 'manager'.  The timers parameters
 * are specified by 'expires' and 'interval'.  Events will be posted to
 * 'task' and when dispatched 'action' will be called with 'arg' as the
 * arg value.  The new timer is returned in 'timerp'.
 *
 * Notes:
 *
 *\li	For ticker timers, the timer will generate a 'tick' event every
 *	'interval' seconds.  The value of 'expires' is ignored.
 *
 *\li	For once timers, 'expires' specifies the time when a life timeout
 *	event should be generated.  If 'expires' is 0 (the epoch), then no life
 *	timeout will be generated.  'interval' specifies how long the timer
 *	can be idle before it generates an idle timeout.  If 0, then no
 *	idle timeout will be generated.
 *
 *\li	If 'expires' is NULL, the epoch will be used.
 *
 *	If 'interval' is NULL, the zero interval will be used.
 *
 * Requires:
 *
 *\li	'manager' is a valid manager
 *
 *\li	'task' is a valid task
 *
 *\li	'action' is a valid action
 *
 *\li	'expires' points to a valid time, or is NULL.
 *
 *\li	'interval' points to a valid interval, or is NULL.
 *
 *\li	type == isc_timertype_inactive ||
 *	('expires' and 'interval' are not both 0)
 *
 *\li	'timerp' is a valid pointer, and *timerp == NULL
 *
 * Ensures:
 *
 *\li	'*timerp' is attached to the newly created timer
 *
 *\li	The timer is attached to the task
 *
 *\li	An idle timeout will not be generated until at least Now + the
 *	timer's interval if 'timer' is a once timer with a non-zero
 *	interval.
 *
 * Returns:
 *
 *\li	Success
 *\li	No memory
 *\li	Unexpected error
 */

isc_result_t
isc_timer_reset(isc_timer_t *timer,
		isc_timertype_t type,
		const isc_time_t *expires,
		const isc_interval_t *interval,
		bool purge);
/*%<
 * Change the timer's type, expires, and interval values to the given
 * values.  If 'purge' is TRUE, any pending events from this timer
 * are purged from its task's event queue.
 *
 * Notes:
 *
 *\li	If 'expires' is NULL, the epoch will be used.
 *
 *\li	If 'interval' is NULL, the zero interval will be used.
 *
 * Requires:
 *
 *\li	'timer' is a valid timer
 *
 *\li	The same requirements that isc_timer_create() imposes on 'type',
 *	'expires' and 'interval' apply.
 *
 * Ensures:
 *
 *\li	An idle timeout will not be generated until at least Now + the
 *	timer's interval if 'timer' is a once timer with a non-zero
 *	interval.
 *
 * Returns:
 *
 *\li	Success
 *\li	No memory
 *\li	Unexpected error
 */

isc_result_t
isc_timer_touch(isc_timer_t *timer);
/*%<
 * Set the last-touched time of 'timer' to the current time.
 *
 * Requires:
 *
 *\li	'timer' is a valid once timer.
 *
 * Ensures:
 *
 *\li	An idle timeout will not be generated until at least Now + the
 *	timer's interval if 'timer' is a once timer with a non-zero
 *	interval.
 *
 * Returns:
 *
 *\li	Success
 *\li	Unexpected error
 */

void
isc_timer_attach(isc_timer_t *timer, isc_timer_t **timerp);
/*%<
 * Attach *timerp to timer.
 *
 * Requires:
 *
 *\li	'timer' is a valid timer.
 *
 *\li	'timerp' points to a NULL timer.
 *
 * Ensures:
 *
 *\li	*timerp is attached to timer.
 */

void
isc_timer_detach(isc_timer_t **timerp);
/*%<
 * Detach *timerp from its timer.
 *
 * Requires:
 *
 *\li	'timerp' points to a valid timer.
 *
 * Ensures:
 *
 *\li	*timerp is NULL.
 *
 *\li	If '*timerp' is the last reference to the timer,
 *	then:
 *
 *\code
 *		The timer will be shutdown
 *
 *		The timer will detach from its task
 *
 *		All resources used by the timer have been freed
 *
 *		Any events already posted by the timer will be purged.
 *		Therefore, if isc_timer_detach() is called in the context
 *		of the timer's task, it is guaranteed that no more
 *		timer event callbacks will run after the call.
 *\endcode
 */

isc_timertype_t
isc_timer_gettype(isc_timer_t *timer);
/*%<
 * Return the timer type.
 *
 * Requires:
 *
 *\li	'timer' to be a valid timer.
 */

isc_result_t
isc_timermgr_createinctx(isc_mem_t *mctx, isc_appctx_t *actx,
			 isc_timermgr_t **managerp);

isc_result_t
isc_timermgr_create(isc_mem_t *mctx, isc_timermgr_t **managerp);
/*%<
 * Create a timer manager.  isc_timermgr_createinctx() also associates
 * the new manager with the specified application context.
 *
 * Notes:
 *
 *\li	All memory will be allocated in memory context 'mctx'.
 *
 * Requires:
 *
 *\li	'mctx' is a valid memory context.
 *
 *\li	'managerp' points to a NULL isc_timermgr_t.
 *
 *\li	'actx' is a valid application context (for createinctx()).
 *
 * Ensures:
 *
 *\li	'*managerp' is a valid isc_timermgr_t.
 *
 * Returns:
 *
 *\li	Success
 *\li	No memory
 *\li	Unexpected error
 */

void
isc_timermgr_destroy(isc_timermgr_t **managerp);
/*%<
 * Destroy a timer manager.
 *
 * Notes:
 *
 *\li	This routine blocks until there are no timers left in the manager,
 *	so if the caller holds any timer references using the manager, it
 *	must detach them before calling isc_timermgr_destroy() or it will
 *	block forever.
 *
 * Requires:
 *
 *\li	'*managerp' is a valid isc_timermgr_t.
 *
 * Ensures:
 *
 *\li	*managerp == NULL
 *
 *\li	All resources used by the manager have been freed.
 */

void isc_timermgr_poke(isc_timermgr_t *m);

/*%<
 * See isc_timermgr_create() above.
 */
typedef isc_result_t
(*isc_timermgrcreatefunc_t)(isc_mem_t *mctx, isc_timermgr_t **managerp);

isc_result_t
isc__timer_register(void);
/*%<
 * Register a new timer management implementation and add it to the list of
 * supported implementations.  This function must be called when a different
 * event library is used than the one contained in the ISC library.
 */

isc_result_t
isc_timer_register(isc_timermgrcreatefunc_t createfunc);
/*%<
 * A short cut function that specifies the timer management module in the ISC
 * library for isc_timer_register().  An application that uses the ISC library
 * usually do not have to care about this function: it would call
 * isc_lib_register(), which internally calls this function.
 */

ISC_LANG_ENDDECLS

#endif /* ISC_TIMER_H */

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-02-21 10:57:15
..	DIR	-	drwxr-xr-x	2025-02-21 10:57:16
aes.h	text/x-c	1.05 KB	-rw-r--r--	2025-02-20 09:05:24
app.h	text/x-c	10.23 KB	-rw-r--r--	2025-02-20 09:05:24
assertions.h	text/x-c	2.84 KB	-rw-r--r--	2025-02-20 09:05:24
atomic.h	text/x-c	4.07 KB	-rw-r--r--	2025-02-20 09:05:24
backtrace.h	text/x-c	3.8 KB	-rw-r--r--	2025-02-20 09:05:24
base32.h	text/x-c	4.35 KB	-rw-r--r--	2025-02-20 09:05:24
base64.h	text/x-c	2.8 KB	-rw-r--r--	2025-02-20 09:05:24
bind9.h	text/x-c	830 B	-rw-r--r--	2025-02-20 09:05:24
boolean.h	text/plain	594 B	-rw-r--r--	2025-02-20 09:05:24
buffer.h	text/x-c	25.65 KB	-rw-r--r--	2025-02-20 09:05:24
bufferlist.h	text/x-c	1.42 KB	-rw-r--r--	2025-02-20 09:05:24
cmocka.h	text/x-c	1.35 KB	-rw-r--r--	2025-02-20 09:05:24
commandline.h	text/x-c	1.67 KB	-rw-r--r--	2025-02-20 09:05:24
condition.h	text/x-c	1.44 KB	-rw-r--r--	2025-02-20 09:05:24
counter.h	text/x-c	1.88 KB	-rw-r--r--	2025-02-20 09:05:24
crc64.h	text/x-c	998 B	-rw-r--r--	2025-02-20 09:05:24
deprecated.h	text/plain	623 B	-rw-r--r--	2025-02-20 09:05:24
dir.h	text/x-c	1.56 KB	-rw-r--r--	2025-02-20 09:05:24
endian.h	text/x-c	4.67 KB	-rw-r--r--	2025-02-20 09:05:24
entropy.h	text/x-c	10.13 KB	-rw-r--r--	2025-02-20 09:05:24
errno.h	text/x-c	659 B	-rw-r--r--	2025-02-20 09:05:24
errno2result.h	text/x-c	902 B	-rw-r--r--	2025-02-20 09:05:37
error.h	text/x-c	1.4 KB	-rw-r--r--	2025-02-20 09:05:24
event.h	text/x-c	2.98 KB	-rw-r--r--	2025-02-20 09:05:24
eventclass.h	text/plain	1.35 KB	-rw-r--r--	2025-02-20 09:05:24
file.h	text/x-c	11.39 KB	-rw-r--r--	2025-02-20 09:05:24
formatcheck.h	text/plain	893 B	-rw-r--r--	2025-02-20 09:05:24
fsaccess.h	text/x-c	7.27 KB	-rw-r--r--	2025-02-20 09:05:24
hash.h	text/x-c	7.48 KB	-rw-r--r--	2025-02-20 09:05:24
heap.h	text/x-c	5.14 KB	-rw-r--r--	2025-02-20 09:05:24
hex.h	text/x-c	2.74 KB	-rw-r--r--	2025-02-20 09:05:24
hmacmd5.h	text/x-c	1.75 KB	-rw-r--r--	2025-02-20 09:05:24
hmacsha.h	text/x-c	4.41 KB	-rw-r--r--	2025-02-20 09:05:24
ht.h	text/x-c	4.29 KB	-rw-r--r--	2025-02-20 09:05:24
httpd.h	text/x-c	2.26 KB	-rw-r--r--	2025-02-20 09:05:24
int.h	text/x-c	1.06 KB	-rw-r--r--	2025-02-20 09:05:24
interfaceiter.h	text/x-c	3.05 KB	-rw-r--r--	2025-02-20 09:05:24
iterated_hash.h	text/x-c	1.02 KB	-rw-r--r--	2025-02-20 09:05:24
json.h	text/x-c	1.42 KB	-rw-r--r--	2025-02-20 09:05:24
keyboard.h	text/x-c	989 B	-rw-r--r--	2025-02-20 09:05:24
lang.h	text/plain	637 B	-rw-r--r--	2025-02-20 09:05:24
lex.h	text/x-c	9.54 KB	-rw-r--r--	2025-02-20 09:05:24
lfsr.h	text/x-c	2.89 KB	-rw-r--r--	2025-02-20 09:05:24
lib.h	text/x-c	1.04 KB	-rw-r--r--	2025-02-20 09:05:24
likely.h	text/plain	818 B	-rw-r--r--	2025-02-20 09:05:24
list.h	text/x-c	5.62 KB	-rw-r--r--	2025-02-20 09:05:24
log.h	text/x-c	28.06 KB	-rw-r--r--	2025-02-20 09:05:24
magic.h	text/x-c	994 B	-rw-r--r--	2025-02-20 09:05:24
md5.h	text/x-c	2.32 KB	-rw-r--r--	2025-02-20 09:05:24
mem.h	text/x-c	20.62 KB	-rw-r--r--	2025-02-20 09:05:24
meminfo.h	text/x-c	710 B	-rw-r--r--	2025-02-20 09:05:24
msgcat.h	text/x-c	2.66 KB	-rw-r--r--	2025-02-20 09:05:24
msgs.h	text/x-c	8.22 KB	-rw-r--r--	2025-02-20 09:05:24
mutex.h	text/x-c	3.44 KB	-rw-r--r--	2025-02-20 09:05:24
mutexblock.h	text/x-c	1.34 KB	-rw-r--r--	2025-02-20 09:05:24
net.h	text/x-c	10.29 KB	-rw-r--r--	2025-02-20 09:05:24
netaddr.h	text/x-c	4.48 KB	-rw-r--r--	2025-02-20 09:05:24
netdb.h	text/x-c	863 B	-rw-r--r--	2025-02-20 09:05:24
netscope.h	text/x-c	967 B	-rw-r--r--	2025-02-20 09:05:24
offset.h	text/x-c	700 B	-rw-r--r--	2025-02-20 09:05:24
once.h	text/x-c	983 B	-rw-r--r--	2025-02-20 09:05:24
ondestroy.h	text/x-c	2.73 KB	-rw-r--r--	2025-02-20 09:05:24
os.h	text/x-c	671 B	-rw-r--r--	2025-02-20 09:05:24
parseint.h	text/x-c	1.51 KB	-rw-r--r--	2025-02-20 09:05:24
platform.h	text/x-c	9.49 KB	-rw-r--r--	2025-02-20 09:05:24
pool.h	text/x-c	3.42 KB	-rw-r--r--	2025-02-20 09:05:24
portset.h	text/x-c	3.22 KB	-rw-r--r--	2025-02-20 09:05:24
print.h	text/x-c	2.42 KB	-rw-r--r--	2025-02-20 09:05:24
queue.h	text/x-c	5.08 KB	-rw-r--r--	2025-02-20 09:05:24
quota.h	text/x-c	2.38 KB	-rw-r--r--	2025-02-20 09:05:24
radix.h	text/x-c	6.34 KB	-rw-r--r--	2025-02-20 09:05:24
random.h	text/x-c	3.5 KB	-rw-r--r--	2025-02-20 09:05:24
ratelimiter.h	text/x-c	3.42 KB	-rw-r--r--	2025-02-20 09:05:24
refcount.h	text/x-c	8 KB	-rw-r--r--	2025-02-20 09:05:24
regex.h	text/x-c	767 B	-rw-r--r--	2025-02-20 09:05:24
region.h	text/x-c	1.99 KB	-rw-r--r--	2025-02-20 09:05:24
resource.h	text/x-c	2.79 KB	-rw-r--r--	2025-02-20 09:05:24
result.h	text/x-c	4.87 KB	-rw-r--r--	2025-02-20 09:05:24
resultclass.h	text/plain	1.56 KB	-rw-r--r--	2025-02-20 09:05:24
rwlock.h	text/x-c	3.72 KB	-rw-r--r--	2025-02-20 09:05:24
safe.h	text/x-c	1.32 KB	-rw-r--r--	2025-02-20 09:05:24
serial.h	text/x-c	1.34 KB	-rw-r--r--	2025-02-20 09:05:24
sha1.h	text/x-c	1.52 KB	-rw-r--r--	2025-02-20 09:05:24
sha2.h	text/x-c	5.6 KB	-rw-r--r--	2025-02-20 09:05:24
siphash.h	text/x-c	734 B	-rw-r--r--	2025-02-20 09:05:24
sockaddr.h	text/x-c	5.9 KB	-rw-r--r--	2025-02-20 09:05:24
socket.h	text/x-c	35.8 KB	-rw-r--r--	2025-02-20 09:05:24
stat.h	text/x-c	806 B	-rw-r--r--	2025-02-20 09:05:24
stats.h	text/x-c	3.62 KB	-rw-r--r--	2025-02-20 09:05:24
stdatomic.h	text/plain	5.13 KB	-rw-r--r--	2025-02-20 09:05:24
stdio.h	text/x-c	1.75 KB	-rw-r--r--	2025-02-20 09:05:24
stdlib.h	text/x-c	704 B	-rw-r--r--	2025-02-20 09:05:24
stdtime.h	text/x-c	1.04 KB	-rw-r--r--	2025-02-20 09:05:24
strerror.h	text/x-c	777 B	-rw-r--r--	2025-02-20 09:05:24
string.h	text/x-c	5.88 KB	-rw-r--r--	2025-02-20 09:05:24
symtab.h	text/x-c	4.22 KB	-rw-r--r--	2025-02-20 09:05:24
syslog.h	text/x-c	844 B	-rw-r--r--	2025-02-20 09:05:24
task.h	text/x-c	21.04 KB	-rw-r--r--	2025-02-20 09:05:24
taskpool.h	text/x-c	3.62 KB	-rw-r--r--	2025-02-20 09:05:24
thread.h	text/x-c	1.47 KB	-rw-r--r--	2025-02-20 09:05:24
time.h	text/x-c	8.67 KB	-rw-r--r--	2025-02-20 09:05:24
timer.h	text/x-c	10.54 KB	-rw-r--r--	2025-02-20 09:05:24
tm.h	text/x-c	895 B	-rw-r--r--	2025-02-20 09:05:24
types.h	text/x-c	5.64 KB	-rw-r--r--	2025-02-20 09:05:24
utf8.h	text/x-c	928 B	-rw-r--r--	2025-02-20 09:05:24
util.h	text/x-c	10.29 KB	-rw-r--r--	2025-02-20 09:05:24
version.h	text/x-c	689 B	-rw-r--r--	2025-02-20 09:05:24
xml.h	text/x-c	1.07 KB	-rw-r--r--	2025-02-20 09:05:24

~ ACUPOFTEA - mail.ontime-ae.com