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
  21static 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
  29typedef 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 */
  46typedef struct {
  47        HANDLE handle;
  48        void *(*start_routine)(void*);
  49        void *arg;
  50        DWORD tid;
  51} pthread_t;
  52
  53extern 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
  62extern int win32_pthread_join(pthread_t *thread, void **value_ptr);
  63
  64#define pthread_equal(t1, t2) ((t1).tid == (t2).tid)
  65extern pthread_t pthread_self(void);
  66
  67static inline void NORETURN pthread_exit(void *ret)
  68{
  69        ExitThread((DWORD)(intptr_t)ret);
  70}
  71
  72typedef DWORD pthread_key_t;
  73static 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
  78static inline int pthread_key_delete(pthread_key_t key)
  79{
  80        return TlsFree(key) ? 0 : EINVAL;
  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#ifndef __MINGW64_VERSION_MAJOR
  94static 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 */