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)), 0)
  22 #define pthread_mutex_destroy(a) DeleteCriticalSection((a))
  23 #define pthread_mutex_lock EnterCriticalSection
  24 #define pthread_mutex_unlock LeaveCriticalSection
  25
  26 typedef int pthread_mutexattr_t;
  27 #define pthread_mutexattr_init(a) (*(a) = 0)
  28 #define pthread_mutexattr_destroy(a) do {} while (0)
  29 #define pthread_mutexattr_settype(a, t) 0
  30 #define PTHREAD_MUTEX_RECURSIVE 0
  31
  32 /*
  33  * Implement simple condition variable for Windows threads, based on ACE
  34  * implementation.
  35  *
  36  * See original implementation: http://bit.ly/1vkDjo
  37  * ACE homepage: http://www.cse.wustl.edu/~schmidt/ACE.html
  38  * See also: http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
  39  */
  40 typedef struct {
  41         LONG waiters;
  42         int was_broadcast;
  43         CRITICAL_SECTION waiters_lock;
  44         HANDLE sema;
  45         HANDLE continue_broadcast;
  46 } pthread_cond_t;
  47
  48 extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
  49 extern int pthread_cond_destroy(pthread_cond_t *cond);
  50 extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
  51 extern int pthread_cond_signal(pthread_cond_t *cond);
  52 extern int pthread_cond_broadcast(pthread_cond_t *cond);
  53
  54 /*
  55  * Simple thread creation implementation using pthread API
  56  */
  57 typedef struct {
  58         HANDLE handle;
  59         void *(*start_routine)(void*);
  60         void *arg;
  61 } pthread_t;
  62
  63 extern int pthread_create(pthread_t *thread, const void *unused,
  64                           void *(*start_routine)(void*), void *arg);
  65
  66 /*
  67  * To avoid the need of copying a struct, we use small macro wrapper to pass
  68  * pointer to win32_pthread_join instead.
  69  */
  70 #define pthread_join(a, b) win32_pthread_join(&(a), (b))
  71
  72 extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
  73
  74 #endif /* PTHREAD_H */