Andrew's git / gitweb.git / compat/win32/pthread.h
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compat / win32 / pthread.hon commit Thread-safe xmalloc and xrealloc needs a recursive mutex (9374919)
   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
  26typedef 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 */
  40typedef 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
  48extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
  49extern int pthread_cond_destroy(pthread_cond_t *cond);
  50extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
  51extern int pthread_cond_signal(pthread_cond_t *cond);
  52extern int pthread_cond_broadcast(pthread_cond_t *cond);
  53
  54/*
  55 * Simple thread creation implementation using pthread API
  56 */
  57typedef struct {
  58        HANDLE handle;
  59        void *(*start_routine)(void*);
  60        void *arg;
  61} pthread_t;
  62
  63extern 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
  72extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
  73
  74#endif /* PTHREAD_H */