Andrew's git - gitweb.git/blob - 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 */
  34typedef 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
  42extern int pthread_cond_init(pthread_cond_t *cond, const void *unused);
  43extern int pthread_cond_destroy(pthread_cond_t *cond);
  44extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
  45extern int pthread_cond_signal(pthread_cond_t *cond);
  46extern int pthread_cond_broadcast(pthread_cond_t *cond);
  47
  48/*
  49 * Simple thread creation implementation using pthread API
  50 */
  51typedef struct {
  52        HANDLE handle;
  53        void *(*start_routine)(void*);
  54        void *arg;
  55        DWORD tid;
  56} pthread_t;
  57
  58extern int pthread_create(pthread_t *thread, const void *unused,
  59                          void *(*start_routine)(void*), void *arg);
  60
  61/*
  62 * To avoid the need of copying a struct, we use small macro wrapper to pass
  63 * pointer to win32_pthread_join instead.
  64 */
  65#define pthread_join(a, b) win32_pthread_join(&(a), (b))
  66
  67extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
  68
  69#define pthread_equal(t1, t2) ((t1).tid == (t2).tid)
  70extern pthread_t pthread_self(void);
  71
  72static inline int pthread_exit(void *ret)
  73{
  74        ExitThread((DWORD)ret);
  75}
  76
  77typedef DWORD pthread_key_t;
  78static inline int pthread_key_create(pthread_key_t *keyp, void (*destructor)(void *value))
  79{
  80        return (*keyp = TlsAlloc()) == TLS_OUT_OF_INDEXES ? EAGAIN : 0;
  81}
  82
  83static inline int pthread_setspecific(pthread_key_t key, const void *value)
  84{
  85        return TlsSetValue(key, (void *)value) ? 0 : EINVAL;
  86}
  87
  88static inline void *pthread_getspecific(pthread_key_t key)
  89{
  90        return TlsGetValue(key);
  91}
  92
  93#endif /* PTHREAD_H */