26 #ifndef _EVTHREAD_INTERNAL_H_
27 #define _EVTHREAD_INTERNAL_H_
34 #include "event2/event-config.h"
35 #include "util-internal.h"
44 #define EVTHREAD_EXPOSE_STRUCTS
47 #if ! defined(_EVENT_DISABLE_THREAD_SUPPORT) && defined(EVTHREAD_EXPOSE_STRUCTS)
52 extern unsigned long (*_evthread_id_fn)(void);
53 extern int _evthread_lock_debugging_enabled;
56 #define EVTHREAD_GET_ID() \
57 (_evthread_id_fn ? _evthread_id_fn() : 1)
61 #define EVBASE_IN_THREAD(base) \
62 (_evthread_id_fn == NULL || \
63 (base)->th_owner_id == _evthread_id_fn())
68 #define EVBASE_NEED_NOTIFY(base) \
69 (_evthread_id_fn != NULL && \
70 (base)->running_loop && \
71 (base)->th_owner_id != _evthread_id_fn())
75 #define EVTHREAD_ALLOC_LOCK(lockvar, locktype) \
76 ((lockvar) = _evthread_lock_fns.alloc ? \
77 _evthread_lock_fns.alloc(locktype) : NULL)
80 #define EVTHREAD_FREE_LOCK(lockvar, locktype) \
82 void *_lock_tmp_ = (lockvar); \
83 if (_lock_tmp_ && _evthread_lock_fns.free) \
84 _evthread_lock_fns.free(_lock_tmp_, (locktype)); \
88 #define EVLOCK_LOCK(lockvar,mode) \
91 _evthread_lock_fns.lock(mode, lockvar); \
95 #define EVLOCK_UNLOCK(lockvar,mode) \
98 _evthread_lock_fns.unlock(mode, lockvar); \
102 #define _EVLOCK_SORTLOCKS(lockvar1, lockvar2) \
104 if (lockvar1 && lockvar2 && lockvar1 > lockvar2) { \
105 void *tmp = lockvar1; \
106 lockvar1 = lockvar2; \
113 #define EVBASE_ACQUIRE_LOCK(base, lockvar) do { \
114 EVLOCK_LOCK((base)->lockvar, 0); \
118 #define EVBASE_RELEASE_LOCK(base, lockvar) do { \
119 EVLOCK_UNLOCK((base)->lockvar, 0); \
124 #define EVLOCK_ASSERT_LOCKED(lock) \
126 if ((lock) && _evthread_lock_debugging_enabled) { \
127 EVUTIL_ASSERT(_evthread_is_debug_lock_held(lock)); \
133 static inline int EVLOCK_TRY_LOCK(
void *lock);
135 EVLOCK_TRY_LOCK(
void *lock)
137 if (lock && _evthread_lock_fns.
lock) {
148 #define EVTHREAD_ALLOC_COND(condvar) \
150 (condvar) = _evthread_cond_fns.alloc_condition ? \
151 _evthread_cond_fns.alloc_condition(0) : NULL; \
154 #define EVTHREAD_FREE_COND(cond) \
157 _evthread_cond_fns.free_condition((cond)); \
160 #define EVTHREAD_COND_SIGNAL(cond) \
161 ( (cond) ? _evthread_cond_fns.signal_condition((cond), 0) : 0 )
163 #define EVTHREAD_COND_BROADCAST(cond) \
164 ( (cond) ? _evthread_cond_fns.signal_condition((cond), 1) : 0 )
169 #define EVTHREAD_COND_WAIT(cond, lock) \
170 ( (cond) ? _evthread_cond_fns.wait_condition((cond), (lock), NULL) : 0 )
173 #define EVTHREAD_COND_WAIT_TIMED(cond, lock, tv) \
174 ( (cond) ? _evthread_cond_fns.wait_condition((cond), (lock), (tv)) : 0 )
176 #elif ! defined(_EVENT_DISABLE_THREAD_SUPPORT)
178 unsigned long _evthreadimpl_get_id(
void);
179 int _evthreadimpl_is_lock_debugging_enabled(
void);
180 void *_evthreadimpl_lock_alloc(
unsigned locktype);
181 void _evthreadimpl_lock_free(
void *lock,
unsigned locktype);
182 int _evthreadimpl_lock_lock(
unsigned mode,
void *lock);
183 int _evthreadimpl_lock_unlock(
unsigned mode,
void *lock);
184 void *_evthreadimpl_cond_alloc(
unsigned condtype);
185 void _evthreadimpl_cond_free(
void *cond);
186 int _evthreadimpl_cond_signal(
void *cond,
int broadcast);
187 int _evthreadimpl_cond_wait(
void *cond,
void *lock,
const struct timeval *tv);
189 #define EVTHREAD_GET_ID() _evthreadimpl_get_id()
190 #define EVBASE_IN_THREAD(base) \
191 ((base)->th_owner_id == _evthreadimpl_get_id())
192 #define EVBASE_NEED_NOTIFY(base) \
193 ((base)->running_loop && \
194 ((base)->th_owner_id != _evthreadimpl_get_id()))
196 #define EVTHREAD_ALLOC_LOCK(lockvar, locktype) \
197 ((lockvar) = _evthreadimpl_lock_alloc(locktype))
199 #define EVTHREAD_FREE_LOCK(lockvar, locktype) \
201 void *_lock_tmp_ = (lockvar); \
203 _evthreadimpl_lock_free(_lock_tmp_, (locktype)); \
207 #define EVLOCK_LOCK(lockvar,mode) \
210 _evthreadimpl_lock_lock(mode, lockvar); \
214 #define EVLOCK_UNLOCK(lockvar,mode) \
217 _evthreadimpl_lock_unlock(mode, lockvar); \
222 #define EVBASE_ACQUIRE_LOCK(base, lockvar) do { \
223 EVLOCK_LOCK((base)->lockvar, 0); \
227 #define EVBASE_RELEASE_LOCK(base, lockvar) do { \
228 EVLOCK_UNLOCK((base)->lockvar, 0); \
233 #define EVLOCK_ASSERT_LOCKED(lock) \
235 if ((lock) && _evthreadimpl_is_lock_debugging_enabled()) { \
236 EVUTIL_ASSERT(_evthread_is_debug_lock_held(lock)); \
242 static inline int EVLOCK_TRY_LOCK(
void *lock);
244 EVLOCK_TRY_LOCK(
void *lock)
257 #define EVTHREAD_ALLOC_COND(condvar) \
259 (condvar) = _evthreadimpl_cond_alloc(0); \
262 #define EVTHREAD_FREE_COND(cond) \
265 _evthreadimpl_cond_free((cond)); \
268 #define EVTHREAD_COND_SIGNAL(cond) \
269 ( (cond) ? _evthreadimpl_cond_signal((cond), 0) : 0 )
271 #define EVTHREAD_COND_BROADCAST(cond) \
272 ( (cond) ? _evthreadimpl_cond_signal((cond), 1) : 0 )
277 #define EVTHREAD_COND_WAIT(cond, lock) \
278 ( (cond) ? _evthreadimpl_cond_wait((cond), (lock), NULL) : 0 )
281 #define EVTHREAD_COND_WAIT_TIMED(cond, lock, tv) \
282 ( (cond) ? _evthreadimpl_cond_wait((cond), (lock), (tv)) : 0 )
286 #define EVTHREAD_GET_ID() 1
287 #define EVTHREAD_ALLOC_LOCK(lockvar, locktype) _EVUTIL_NIL_STMT
288 #define EVTHREAD_FREE_LOCK(lockvar, locktype) _EVUTIL_NIL_STMT
290 #define EVLOCK_LOCK(lockvar, mode) _EVUTIL_NIL_STMT
291 #define EVLOCK_UNLOCK(lockvar, mode) _EVUTIL_NIL_STMT
292 #define EVLOCK_LOCK2(lock1,lock2,mode1,mode2) _EVUTIL_NIL_STMT
293 #define EVLOCK_UNLOCK2(lock1,lock2,mode1,mode2) _EVUTIL_NIL_STMT
295 #define EVBASE_IN_THREAD(base) 1
296 #define EVBASE_NEED_NOTIFY(base) 0
297 #define EVBASE_ACQUIRE_LOCK(base, lock) _EVUTIL_NIL_STMT
298 #define EVBASE_RELEASE_LOCK(base, lock) _EVUTIL_NIL_STMT
299 #define EVLOCK_ASSERT_LOCKED(lock) _EVUTIL_NIL_STMT
301 #define EVLOCK_TRY_LOCK(lock) 1
303 #define EVTHREAD_ALLOC_COND(condvar) _EVUTIL_NIL_STMT
304 #define EVTHREAD_FREE_COND(cond) _EVUTIL_NIL_STMT
305 #define EVTHREAD_COND_SIGNAL(cond) _EVUTIL_NIL_STMT
306 #define EVTHREAD_COND_BROADCAST(cond) _EVUTIL_NIL_STMT
307 #define EVTHREAD_COND_WAIT(cond, lock) _EVUTIL_NIL_STMT
308 #define EVTHREAD_COND_WAIT_TIMED(cond, lock, howlong) _EVUTIL_NIL_STMT
313 #if ! defined(_EVENT_DISABLE_THREAD_SUPPORT)
315 #define _EVLOCK_SORTLOCKS(lockvar1, lockvar2) \
317 if (lockvar1 && lockvar2 && lockvar1 > lockvar2) { \
318 void *tmp = lockvar1; \
319 lockvar1 = lockvar2; \
326 #define EVLOCK_LOCK2(lock1,lock2,mode1,mode2) \
328 void *_lock1_tmplock = (lock1); \
329 void *_lock2_tmplock = (lock2); \
330 _EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock); \
331 EVLOCK_LOCK(_lock1_tmplock,mode1); \
332 if (_lock2_tmplock != _lock1_tmplock) \
333 EVLOCK_LOCK(_lock2_tmplock,mode2); \
336 #define EVLOCK_UNLOCK2(lock1,lock2,mode1,mode2) \
338 void *_lock1_tmplock = (lock1); \
339 void *_lock2_tmplock = (lock2); \
340 _EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock); \
341 if (_lock2_tmplock != _lock1_tmplock) \
342 EVLOCK_UNLOCK(_lock2_tmplock,mode2); \
343 EVLOCK_UNLOCK(_lock1_tmplock,mode1); \
346 int _evthread_is_debug_lock_held(
void *lock);
347 void *_evthread_debug_get_real_lock(
void *lock);
349 void *evthread_setup_global_lock_(
void *lock_,
unsigned locktype,
352 #define EVTHREAD_SETUP_GLOBAL_LOCK(lockvar, locktype) \
354 lockvar = evthread_setup_global_lock_(lockvar, \
355 (locktype), enable_locks); \
357 event_warn("Couldn't allocate %s", #lockvar); \
362 int event_global_setup_locks_(
const int enable_locks);
363 int evsig_global_setup_locks_(
const int enable_locks);
364 int evutil_secure_rng_global_setup_locks_(
const int enable_locks);
This structure describes the interface a threading library uses for condition variables.
Definition: thread.h:141
Functions for multi-threaded applications using Libevent.
int(* lock)(unsigned mode, void *lock)
Acquire an already-allocated lock at 'lock' with mode 'mode'.
Definition: thread.h:117
#define EVTHREAD_TRY
A flag passed to a locking callback when we don't want to block waiting for the lock; if we can't get...
Definition: thread.h:73
This structure describes the interface a threading library uses for locking.
Definition: thread.h:97
Definition: event-internal.h:167