/**

 * Copyright (c) 2016 Tino Reichardt

 * All rights reserved.

 *

 * This source code is licensed under the BSD-style license found in the

 * LICENSE file in the root directory of this source tree. An additional grant

 * of patent rights can be found in the PATENTS file in the same directory.

 *

 * You can contact the author at:

 * - zstdmt source repository: https://github.com/mcmilk/zstdmt

 */

#ifndef THREADING_H_938743

#define THREADING_H_938743

#if defined (__cplusplus)

extern "C" {

#endif

#if defined(ZSTD_MULTITHREAD) && defined(_WIN32)

/**

 * Windows minimalist Pthread Wrapper, based on :

 * http://www.cse.wustl.edu/~schmidt/win32-cv-1.html

 */

#ifdef WINVER

#  undef WINVER

#endif

#define WINVER       0x0600

#ifdef _WIN32_WINNT

#  undef _WIN32_WINNT

#endif

#define _WIN32_WINNT 0x0600

#ifndef WIN32_LEAN_AND_MEAN

#  define WIN32_LEAN_AND_MEAN

#endif

#include <windows.h>

/* mutex */

#define pthread_mutex_t           CRITICAL_SECTION

#define pthread_mutex_init(a,b)   InitializeCriticalSection((a))

#define pthread_mutex_destroy(a)  DeleteCriticalSection((a))

#define pthread_mutex_lock(a)     EnterCriticalSection((a))

#define pthread_mutex_unlock(a)   LeaveCriticalSection((a))

/* condition variable */

#define pthread_cond_t             CONDITION_VARIABLE

#define pthread_cond_init(a, b)    InitializeConditionVariable((a))

#define pthread_cond_destroy(a)    /* No delete */

#define pthread_cond_wait(a, b)    SleepConditionVariableCS((a), (b), INFINITE)

#define pthread_cond_signal(a)     WakeConditionVariable((a))

#define pthread_cond_broadcast(a)  WakeAllConditionVariable((a))

/* pthread_create() and pthread_join() */

typedef struct {

    HANDLE handle;

    void* (*start_routine)(void*);

    void* arg;

} pthread_t;

int pthread_create(pthread_t* thread, const void* unused,

                   void* (*start_routine) (void*), void* arg);

#define pthread_join(a, b) _pthread_join(&(a), (b))

int _pthread_join(pthread_t* thread, void** value_ptr);

/**

 * add here more wrappers as required

 */

#elif defined(ZSTD_MULTITHREAD)   /* posix assumed ; need a better detection mathod */

/* ===   POSIX Systems   === */

#  include <pthread.h>

#else  /* ZSTD_MULTITHREAD not defined */

/* No multithreading support */

#define pthread_mutex_t int   /* #define rather than typedef, as sometimes pthread support is implicit, resulting in duplicated symbols */

#define pthread_mutex_init(a,b)

#define pthread_mutex_destroy(a)

#define pthread_mutex_lock(a)

#define pthread_mutex_unlock(a)

#define pthread_cond_t int

#define pthread_cond_init(a,b)

#define pthread_cond_destroy(a)

#define pthread_cond_wait(a,b)

#define pthread_cond_signal(a)

#define pthread_cond_broadcast(a)

/* do not use pthread_t */

#endif /* ZSTD_MULTITHREAD */

#if defined (__cplusplus)

}

#endif

#endif /* THREADING_H_938743 */