1 /******************************************************************************/
2 #ifdef JEMALLOC_H_TYPES
3 
4 typedef struct malloc_mutex_s malloc_mutex_t;
5 
6 #ifdef _WIN32
7 #  define MALLOC_MUTEX_INITIALIZER
8 #elif (defined(JEMALLOC_OSSPIN))
9 #  define MALLOC_MUTEX_INITIALIZER {0}
10 #elif (defined(JEMALLOC_MUTEX_INIT_CB))
11 #  define MALLOC_MUTEX_INITIALIZER {PTHREAD_MUTEX_INITIALIZER, NULL}
12 #else
13 #  if (defined(JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP) &&		\
14        defined(PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP))
15 #    define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_ADAPTIVE_NP
16 #    define MALLOC_MUTEX_INITIALIZER {PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP}
17 #  else
18 #    define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_DEFAULT
19 #    define MALLOC_MUTEX_INITIALIZER {PTHREAD_MUTEX_INITIALIZER}
20 #  endif
21 #endif
22 
23 #endif /* JEMALLOC_H_TYPES */
24 /******************************************************************************/
25 #ifdef JEMALLOC_H_STRUCTS
26 
27 struct malloc_mutex_s {
28 #ifdef _WIN32
29 	CRITICAL_SECTION	lock;
30 #elif (defined(JEMALLOC_OSSPIN))
31 	OSSpinLock		lock;
32 #elif (defined(JEMALLOC_MUTEX_INIT_CB))
33 	pthread_mutex_t		lock;
34 	malloc_mutex_t		*postponed_next;
35 #else
36 	pthread_mutex_t		lock;
37 #endif
38 };
39 
40 #endif /* JEMALLOC_H_STRUCTS */
41 /******************************************************************************/
42 #ifdef JEMALLOC_H_EXTERNS
43 
44 #ifdef JEMALLOC_LAZY_LOCK
45 extern bool isthreaded;
46 #else
47 #  undef isthreaded /* Undo private_namespace.h definition. */
48 #  define isthreaded true
49 #endif
50 
51 bool	malloc_mutex_init(malloc_mutex_t *mutex);
52 void	malloc_mutex_prefork(malloc_mutex_t *mutex);
53 void	malloc_mutex_postfork_parent(malloc_mutex_t *mutex);
54 void	malloc_mutex_postfork_child(malloc_mutex_t *mutex);
55 bool	mutex_boot(void);
56 
57 #endif /* JEMALLOC_H_EXTERNS */
58 /******************************************************************************/
59 #ifdef JEMALLOC_H_INLINES
60 
61 #ifndef JEMALLOC_ENABLE_INLINE
62 void	malloc_mutex_lock(malloc_mutex_t *mutex);
63 void	malloc_mutex_unlock(malloc_mutex_t *mutex);
64 #endif
65 
66 #if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_MUTEX_C_))
67 JEMALLOC_INLINE void
malloc_mutex_lock(malloc_mutex_t * mutex)68 malloc_mutex_lock(malloc_mutex_t *mutex)
69 {
70 
71 	if (isthreaded) {
72 #ifdef _WIN32
73 		EnterCriticalSection(&mutex->lock);
74 #elif (defined(JEMALLOC_OSSPIN))
75 		OSSpinLockLock(&mutex->lock);
76 #else
77 		pthread_mutex_lock(&mutex->lock);
78 #endif
79 	}
80 }
81 
82 JEMALLOC_INLINE void
malloc_mutex_unlock(malloc_mutex_t * mutex)83 malloc_mutex_unlock(malloc_mutex_t *mutex)
84 {
85 
86 	if (isthreaded) {
87 #ifdef _WIN32
88 		LeaveCriticalSection(&mutex->lock);
89 #elif (defined(JEMALLOC_OSSPIN))
90 		OSSpinLockUnlock(&mutex->lock);
91 #else
92 		pthread_mutex_unlock(&mutex->lock);
93 #endif
94 	}
95 }
96 #endif
97 
98 #endif /* JEMALLOC_H_INLINES */
99 /******************************************************************************/
100