mutex.h revision 6da5418ded9170b087c35960e0010006430117c1 
1/******************************************************************************/
2#ifdef JEMALLOC_H_TYPES
3
4#ifdef JEMALLOC_OSSPIN
5typedef OSSpinLock malloc_mutex_t;
6#define	MALLOC_MUTEX_INITIALIZER 0
7#else
8typedef pthread_mutex_t malloc_mutex_t;
9#  ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
10#    define MALLOC_MUTEX_INITIALIZER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
11#  else
12#    define MALLOC_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
13#  endif
14#endif
15
16#endif /* JEMALLOC_H_TYPES */
17/******************************************************************************/
18#ifdef JEMALLOC_H_STRUCTS
19
20#endif /* JEMALLOC_H_STRUCTS */
21/******************************************************************************/
22#ifdef JEMALLOC_H_EXTERNS
23
24#ifdef JEMALLOC_LAZY_LOCK
25extern bool isthreaded;
26#else
27#  define isthreaded true
28#endif
29
30bool	malloc_mutex_init(malloc_mutex_t *mutex);
31void	malloc_mutex_prefork(malloc_mutex_t *mutex);
32void	malloc_mutex_postfork_parent(malloc_mutex_t *mutex);
33void	malloc_mutex_postfork_child(malloc_mutex_t *mutex);
34
35#endif /* JEMALLOC_H_EXTERNS */
36/******************************************************************************/
37#ifdef JEMALLOC_H_INLINES
38
39#ifndef JEMALLOC_ENABLE_INLINE
40void	malloc_mutex_lock(malloc_mutex_t *mutex);
41bool	malloc_mutex_trylock(malloc_mutex_t *mutex);
42void	malloc_mutex_unlock(malloc_mutex_t *mutex);
43#endif
44
45#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_MUTEX_C_))
46JEMALLOC_INLINE void
47malloc_mutex_lock(malloc_mutex_t *mutex)
48{
49
50	if (isthreaded) {
51#ifdef JEMALLOC_OSSPIN
52		OSSpinLockLock(mutex);
53#else
54		pthread_mutex_lock(mutex);
55#endif
56	}
57}
58
59JEMALLOC_INLINE bool
60malloc_mutex_trylock(malloc_mutex_t *mutex)
61{
62
63	if (isthreaded) {
64#ifdef JEMALLOC_OSSPIN
65		return (OSSpinLockTry(mutex) == false);
66#else
67		return (pthread_mutex_trylock(mutex) != 0);
68#endif
69	} else
70		return (false);
71}
72
73JEMALLOC_INLINE void
74malloc_mutex_unlock(malloc_mutex_t *mutex)
75{
76
77	if (isthreaded) {
78#ifdef JEMALLOC_OSSPIN
79		OSSpinLockUnlock(mutex);
80#else
81		pthread_mutex_unlock(mutex);
82#endif
83	}
84}
85#endif
86
87#endif /* JEMALLOC_H_INLINES */
88/******************************************************************************/
89