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(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 #endif
47 
48 bool	malloc_mutex_init(malloc_mutex_t *mutex);
49 void	malloc_mutex_prefork(malloc_mutex_t *mutex);
50 void	malloc_mutex_postfork_parent(malloc_mutex_t *mutex);
51 void	malloc_mutex_postfork_child(malloc_mutex_t *mutex);
52 bool	malloc_mutex_first_thread(void);
53 bool	mutex_boot(void);
54 
55 #endif /* JEMALLOC_H_EXTERNS */
56 /******************************************************************************/
57 #ifdef JEMALLOC_H_INLINES
58 
59 #ifndef JEMALLOC_ENABLE_INLINE
60 void	malloc_mutex_lock(malloc_mutex_t *mutex);
61 void	malloc_mutex_unlock(malloc_mutex_t *mutex);
62 #endif
63 
64 #if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_MUTEX_C_))
65 JEMALLOC_INLINE void
malloc_mutex_lock(malloc_mutex_t * mutex)66 malloc_mutex_lock(malloc_mutex_t *mutex)
67 {
68 
69 	if (isthreaded) {
70 #ifdef _WIN32
71 		EnterCriticalSection(&mutex->lock);
72 #elif (defined(JEMALLOC_OSSPIN))
73 		OSSpinLockLock(&mutex->lock);
74 #else
75 		pthread_mutex_lock(&mutex->lock);
76 #endif
77 	}
78 }
79 
80 JEMALLOC_INLINE void
malloc_mutex_unlock(malloc_mutex_t * mutex)81 malloc_mutex_unlock(malloc_mutex_t *mutex)
82 {
83 
84 	if (isthreaded) {
85 #ifdef _WIN32
86 		LeaveCriticalSection(&mutex->lock);
87 #elif (defined(JEMALLOC_OSSPIN))
88 		OSSpinLockUnlock(&mutex->lock);
89 #else
90 		pthread_mutex_unlock(&mutex->lock);
91 #endif
92 	}
93 }
94 #endif
95 
96 #endif /* JEMALLOC_H_INLINES */
97 /******************************************************************************/
98