c6cb8dd2190062b3c3db2ac93a996c859a2e1145
[git/git.git] / compat / win32 / pthread.h
1 /*
2 * Header used to adapt pthread-based POSIX code to Windows API threads.
3 *
4 * Copyright (C) 2009 Andrzej K. Haczewski <ahaczewski@gmail.com>
5 */
6
7 #ifndef PTHREAD_H
8 #define PTHREAD_H
9
10 #ifndef WIN32_LEAN_AND_MEAN
11 #define WIN32_LEAN_AND_MEAN
12 #endif
13
14 #include <windows.h>
15
16 /*
17 * Defines that adapt Windows API threads to pthreads API
18 */
19 #define pthread_mutex_t CRITICAL_SECTION
20
21 static inline int return_0(int i) {
22 return 0;
23 }
24 #define pthread_mutex_init(a,b) return_0((InitializeCriticalSection((a)), 0))
25 #define pthread_mutex_destroy(a) DeleteCriticalSection((a))
26 #define pthread_mutex_lock EnterCriticalSection
27 #define pthread_mutex_unlock LeaveCriticalSection
28
29 typedef int pthread_mutexattr_t;
30 #define pthread_mutexattr_init(a) (*(a) = 0)
31 #define pthread_mutexattr_destroy(a) do {} while (0)
32 #define pthread_mutexattr_settype(a, t) 0
33 #define PTHREAD_MUTEX_RECURSIVE 0
34
35 #define pthread_cond_t CONDITION_VARIABLE
36
37 #define pthread_cond_init(a,b) InitializeConditionVariable((a))
38 #define pthread_cond_destroy(a) do {} while (0)
39 #define pthread_cond_wait(a,b) return_0(SleepConditionVariableCS((a), (b), INFINITE))
40 #define pthread_cond_signal WakeConditionVariable
41 #define pthread_cond_broadcast WakeAllConditionVariable
42
43 /*
44 * Simple thread creation implementation using pthread API
45 */
46 typedef struct {
47 HANDLE handle;
48 void *(*start_routine)(void*);
49 void *arg;
50 DWORD tid;
51 } pthread_t;
52
53 extern int pthread_create(pthread_t *thread, const void *unused,
54 void *(*start_routine)(void*), void *arg);
55
56 /*
57 * To avoid the need of copying a struct, we use small macro wrapper to pass
58 * pointer to win32_pthread_join instead.
59 */
60 #define pthread_join(a, b) win32_pthread_join(&(a), (b))
61
62 extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
63
64 #define pthread_equal(t1, t2) ((t1).tid == (t2).tid)
65 extern pthread_t pthread_self(void);
66
67 static inline void NORETURN pthread_exit(void *ret)
68 {
69 ExitThread((DWORD)(intptr_t)ret);
70 }
71
72 typedef DWORD pthread_key_t;
73 static inline int pthread_key_create(pthread_key_t *keyp, void (*destructor)(void *value))
74 {
75 return (*keyp = TlsAlloc()) == TLS_OUT_OF_INDEXES ? EAGAIN : 0;
76 }
77
78 static inline int pthread_key_delete(pthread_key_t key)
79 {
80 return TlsFree(key) ? 0 : EINVAL;
81 }
82
83 static inline int pthread_setspecific(pthread_key_t key, const void *value)
84 {
85 return TlsSetValue(key, (void *)value) ? 0 : EINVAL;
86 }
87
88 static inline void *pthread_getspecific(pthread_key_t key)
89 {
90 return TlsGetValue(key);
91 }
92
93 #ifndef __MINGW64_VERSION_MAJOR
94 static inline int pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
95 {
96 return 0;
97 }
98 #endif
99
100 #endif /* PTHREAD_H */