FM / isc

/usr/include/isc

Name	Size	Mode	Actions
app.h	10535	0644	edit dl rm
assertions.h	3314	0644	edit dl rm
atomic.h	4258	0644	edit dl rm
base64.h	2967	0644	edit dl rm
bind9.h	1185	0644	edit dl rm
bitstring.h	4478	0644	edit dl rm
boolean.h	1212	0644	edit dl rm
buffer.h	22941	0644	edit dl rm
bufferlist.h	1979	0644	edit dl rm
commandline.h	1823	0644	edit dl rm
condition.h	2011	0644	edit dl rm
counter.h	2328	0644	edit dl rm
dir.h	2569	0644	edit dl rm
entropy.h	9444	0644	edit dl rm
error.h	1871	0644	edit dl rm
event.h	3360	0644	edit dl rm
eventclass.h	1915	0644	edit dl rm
file.h	9259	0644	edit dl rm
formatcheck.h	1423	0644	edit dl rm
fsaccess.h	7954	0644	edit dl rm
hash.h	5973	0644	edit dl rm
heap.h	5754	0644	edit dl rm
hex.h	2911	0644	edit dl rm
hmacmd5.h	1964	0644	edit dl rm
httpd.h	2029	0644	edit dl rm
int.h	1873	0644	edit dl rm
interfaceiter.h	3631	0644	edit dl rm
iterated_hash.h	1512	0644	edit dl rm
keyboard.h	1510	0644	edit dl rm
lang.h	1158	0644	edit dl rm
lex.h	9653	0644	edit dl rm
lfsr.h	3480	0644	edit dl rm
lib.h	1594	0644	edit dl rm
list.h	5887	0644	edit dl rm
log.h	28964	0644	edit dl rm
magic.h	1471	0644	edit dl rm
md5.h	2527	0644	edit dl rm
mem.h	21767	0644	edit dl rm
msgcat.h	3256	0644	edit dl rm
msgs.h	8862	0644	edit dl rm
mutex.h	4061	0644	edit dl rm
mutexblock.h	1902	0644	edit dl rm
namespace.h	7184	0644	edit dl rm
net.h	9269	0644	edit dl rm
netaddr.h	4917	0644	edit dl rm
netdb.h	1392	0644	edit dl rm
offset.h	1898	0644	edit dl rm
once.h	1510	0644	edit dl rm
ondestroy.h	3327	0644	edit dl rm
os.h	1191	0644	edit dl rm
parseint.h	2058	0644	edit dl rm
platform.h	8623	0644	edit dl rm
print.h	2449	0644	edit dl rm
quota.h	2873	0644	edit dl rm
radix.h	7058	0644	edit dl rm
random.h	1826	0644	edit dl rm
ratelimiter.h	3564	0644	edit dl rm
refcount.h	6203	0644	edit dl rm
region.h	2497	0644	edit dl rm
resource.h	3396	0644	edit dl rm
result.h	4814	0644	edit dl rm
resultclass.h	2077	0644	edit dl rm
rwlock.h	3843	0644	edit dl rm
serial.h	1959	0644	edit dl rm
sha1.h	1806	0644	edit dl rm
sha2.h	5861	0644	edit dl rm
sockaddr.h	6578	0644	edit dl rm
socket.h	32969	0644	edit dl rm
stdio.h	2243	0644	edit dl rm
stdlib.h	1221	0644	edit dl rm
stdtime.h	1880	0644	edit dl rm
string.h	6404	0644	edit dl rm
symtab.h	4748	0644	edit dl rm
syslog.h	1373	0644	edit dl rm
task.h	19753	0644	edit dl rm
taskpool.h	3787	0644	edit dl rm
thread.h	1878	0644	edit dl rm
time.h	8045	0644	edit dl rm
timer.h	11285	0644	edit dl rm
types.h	5929	0644	edit dl rm
util.h	7934	0644	edit dl rm
version.h	1207	0644	edit dl rm
xml.h	1556	0644	edit dl rm

Edit: /usr/include/isc/timer.h (11285B)

/*
 * Copyright (C) 2004-2009  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2002  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: timer.h,v 1.43 2009-09-02 23:48:03 tbox Exp $ */

#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 <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_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,
				       isc_time_t *expires,
				       isc_interval_t *interval,
				       isc_task_t *task,
				       isc_taskaction_t action,
				       const 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,
				 isc_time_t *expires, isc_interval_t *interval,
				 isc_boolean_t 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,
		 isc_time_t *expires,
		 isc_interval_t *interval,
		 isc_task_t *task,
		 isc_taskaction_t action,
		 const 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,
		isc_time_t *expires,
		isc_interval_t *interval,
		isc_boolean_t 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);

#ifdef USE_TIMERIMPREGISTER
/*%<
 * 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.
 */
#endif /* USE_TIMERIMPREGISTER */

ISC_LANG_ENDDECLS

#endif /* ISC_TIMER_H */

cmd: