mirror of
https://github.com/libevent/libevent.git
synced 2025-01-09 00:56:20 +08:00
129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2008 Niels Provos <provos@citi.umich.edu>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#ifndef _EVTHREAD_INTERNAL_H_
|
|
#define _EVTHREAD_INTERNAL_H_
|
|
|
|
#ifdef __cplusplus
|
|
//extern "C" {
|
|
#endif
|
|
|
|
#include "event-config.h"
|
|
|
|
struct event_base;
|
|
|
|
#ifndef _EVENT_DISABLE_THREAD_SUPPORT
|
|
extern void (*_evthread_locking_fn)(int mode, void *lock);
|
|
extern unsigned long (*_evthread_id_fn)(void);
|
|
extern void *(*_evthread_lock_alloc_fn)(void);
|
|
extern void (*_evthread_lock_free_fn)(void *);
|
|
|
|
#define EVBASE_USING_LOCKS(base) \
|
|
(base != NULL && (base)->th_base_lock != NULL)
|
|
|
|
#define EVTHREAD_GET_ID() \
|
|
(_evthread_id_fn ? _evthread_id_fn() : 1)
|
|
|
|
#define EVBASE_IN_THREAD(base) \
|
|
(_evthread_id_fn == NULL || \
|
|
(base)->th_owner_id == _evthread_id_fn())
|
|
|
|
#define EVTHREAD_ALLOC_LOCK(lockvar) \
|
|
((lockvar) = _evthread_lock_alloc_fn ? \
|
|
_evthread_lock_alloc_fn() : NULL)
|
|
|
|
#define EVTHREAD_FREE_LOCK(lockvar) \
|
|
do { \
|
|
if (lockvar && _evthread_lock_free_fn) \
|
|
_evthread_lock_free_fn(lockvar); \
|
|
} while (0)
|
|
|
|
#define EVLOCK_LOCK(lock,mode) \
|
|
do { \
|
|
if (lock) \
|
|
_evthread_locking_fn(EVTHREAD_LOCK|mode, lock); \
|
|
} while (0)
|
|
#define EVLOCK_UNLOCK(lock,mode) \
|
|
do { \
|
|
if (lock) \
|
|
_evthread_locking_fn(EVTHREAD_UNLOCK|mode, lock); \
|
|
} while (0)
|
|
#define _EVLOCK_SORTLOCKS(lockvar1, lockvar2) \
|
|
do { \
|
|
if (lockvar1 && lockvar2 && lockvar1 > lockvar2) { \
|
|
void *tmp = lockvar1; \
|
|
lockvar1 = lockvar2; \
|
|
lockvar2 = tmp; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define EVLOCK_LOCK2(lock1,lock2,mode1,mode2) \
|
|
do { \
|
|
void *_lock1_tmplock = (lock1); \
|
|
void *_lock2_tmplock = (lock2); \
|
|
_EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock); \
|
|
EVLOCK_LOCK(_lock1_tmplock,mode1); \
|
|
if (_lock2_tmplock != _lock1_tmplock) \
|
|
EVLOCK_LOCK(_lock2_tmplock,mode2); \
|
|
} while (0)
|
|
|
|
#define EVLOCK_UNLOCK2(lock1,lock2,mode1,mode2) \
|
|
do { \
|
|
void *_lock1_tmplock = (lock1); \
|
|
void *_lock2_tmplock = (lock2); \
|
|
_EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock); \
|
|
if (_lock2_tmplock != _lock1_tmplock) \
|
|
EVLOCK_UNLOCK(_lock2_tmplock,mode2); \
|
|
EVLOCK_UNLOCK(_lock1_tmplock,mode1); \
|
|
} while (0)
|
|
|
|
|
|
#define EVBASE_ACQUIRE_LOCK(base, mode, lock) do { \
|
|
if (EVBASE_USING_LOCKS(base)) \
|
|
_evthread_locking_fn(EVTHREAD_LOCK | mode, \
|
|
(base)->lock); \
|
|
} while (0)
|
|
|
|
#define EVBASE_RELEASE_LOCK(base, mode, lock) do { \
|
|
if (EVBASE_USING_LOCKS(base)) \
|
|
_evthread_locking_fn(EVTHREAD_UNLOCK | mode, \
|
|
(base)->lock); \
|
|
} while (0)
|
|
#else /* _EVENT_DISABLE_THREAD_SUPPORT */
|
|
#define EVTHREAD_GET_ID() 1
|
|
#define EVTHREAD_ALLOC_LOCK(lockvar)
|
|
#define EVTHREAD_FREE_LOCK(lockvar)
|
|
|
|
#define EVBASE_IN_THREAD() 1
|
|
#define EVBASE_ACQUIRE_LOCK(base, mode, lock)
|
|
#define EVBASE_RELEASE_LOCK(base, mode, lock)
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _EVTHREAD_INTERNAL_H_ */
|