Merge branch 'jc/maint-reflog-expire-unreachable'
[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 #define pthread_mutex_init(a,b) InitializeCriticalSection((a))
22 #define pthread_mutex_destroy(a) DeleteCriticalSection((a))
23 #define pthread_mutex_lock EnterCriticalSection
24 #define pthread_mutex_unlock LeaveCriticalSection
25
26 /*
27  * Implement simple condition variable for Windows threads, based on ACE
28  * implementation.
29  *
30  * See original implementation: http://bit.ly/1vkDjo
31  * ACE homepage: http://www.cse.wustl.edu/~schmidt/ACE.html
32  * See also: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
33  */
34 typedef struct {
35         LONG waiters;
36         int was_broadcast;
37         CRITICAL_SECTION waiters_lock;
38         HANDLE sema;
39         HANDLE continue_broadcast;
40 } pthread_cond_t;
41
42 extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
43 extern int pthread_cond_destroy(pthread_cond_t *cond);
44 extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
45 extern int pthread_cond_signal(pthread_cond_t *cond);
46 extern int pthread_cond_broadcast(pthread_cond_t *cond);
47
48 /*
49  * Simple thread creation implementation using pthread API
50  */
51 typedef struct {
52         HANDLE handle;
53         void *(*start_routine)(void*);
54         void *arg;
55 } pthread_t;
56
57 extern int pthread_create(pthread_t *thread, const void *unused,
58                           void *(*start_routine)(void*), void *arg);
59
60 /*
61  * To avoid the need of copying a struct, we use small macro wrapper to pass
62  * pointer to win32_pthread_join instead.
63  */
64 #define pthread_join(a, b) win32_pthread_join(&(a), (b))
65
66 extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
67
68 #endif /* PTHREAD_H */