FreeBSD/Linux Kernel Cross Reference
sys/contrib/zstd/lib/common/threading.h

     /**
      * Copyright (c) 2016 Tino Reichardt
      * All rights reserved.
      *
      * You can contact the author at:
      * - zstdmt source repository: https://github.com/mcmilk/zstdmt
      *
      * This source code is licensed under both the BSD-style license (found in the
      * LICENSE file in the root directory of this source tree) and the GPLv2 (found
     * in the COPYING file in the root directory of this source tree).
     * You may select, at your option, one of the above-listed licenses.
     */
    
    #ifndef THREADING_H_938743
    #define THREADING_H_938743
    
    #include "debug.h"
    
    #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
    
    #undef ERROR   /* reported already defined on VS 2015 (Rich Geldreich) */
    #include <windows.h>
    #undef ERROR
    #define ERROR(name) ZSTD_ERROR(name)
    
    
    /* mutex */
    #define ZSTD_pthread_mutex_t           CRITICAL_SECTION
    #define ZSTD_pthread_mutex_init(a, b)  ((void)(b), InitializeCriticalSection((a)), 0)
    #define ZSTD_pthread_mutex_destroy(a)  DeleteCriticalSection((a))
    #define ZSTD_pthread_mutex_lock(a)     EnterCriticalSection((a))
    #define ZSTD_pthread_mutex_unlock(a)   LeaveCriticalSection((a))
    
    /* condition variable */
    #define ZSTD_pthread_cond_t             CONDITION_VARIABLE
    #define ZSTD_pthread_cond_init(a, b)    ((void)(b), InitializeConditionVariable((a)), 0)
    #define ZSTD_pthread_cond_destroy(a)    ((void)(a))
    #define ZSTD_pthread_cond_wait(a, b)    SleepConditionVariableCS((a), (b), INFINITE)
    #define ZSTD_pthread_cond_signal(a)     WakeConditionVariable((a))
    #define ZSTD_pthread_cond_broadcast(a)  WakeAllConditionVariable((a))
    
    /* ZSTD_pthread_create() and ZSTD_pthread_join() */
    typedef struct {
        HANDLE handle;
        void* (*start_routine)(void*);
        void* arg;
    } ZSTD_pthread_t;
    
    int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused,
                       void* (*start_routine) (void*), void* arg);
    
    int ZSTD_pthread_join(ZSTD_pthread_t thread, void** value_ptr);
    
    /**
     * add here more wrappers as required
     */
    
    
    #elif defined(ZSTD_MULTITHREAD)    /* posix assumed ; need a better detection method */
    /* ===   POSIX Systems   === */
    #  include <pthread.h>
    
    #if DEBUGLEVEL < 1
    
    #define ZSTD_pthread_mutex_t            pthread_mutex_t
    #define ZSTD_pthread_mutex_init(a, b)   pthread_mutex_init((a), (b))
    #define ZSTD_pthread_mutex_destroy(a)   pthread_mutex_destroy((a))
    #define ZSTD_pthread_mutex_lock(a)      pthread_mutex_lock((a))
    #define ZSTD_pthread_mutex_unlock(a)    pthread_mutex_unlock((a))
    
    #define ZSTD_pthread_cond_t             pthread_cond_t
    #define ZSTD_pthread_cond_init(a, b)    pthread_cond_init((a), (b))
    #define ZSTD_pthread_cond_destroy(a)    pthread_cond_destroy((a))
    #define ZSTD_pthread_cond_wait(a, b)    pthread_cond_wait((a), (b))
    #define ZSTD_pthread_cond_signal(a)     pthread_cond_signal((a))
    #define ZSTD_pthread_cond_broadcast(a)  pthread_cond_broadcast((a))
    
   #define ZSTD_pthread_t                  pthread_t
   #define ZSTD_pthread_create(a, b, c, d) pthread_create((a), (b), (c), (d))
   #define ZSTD_pthread_join(a, b)         pthread_join((a),(b))
   
   #else /* DEBUGLEVEL >= 1 */
   
   /* Debug implementation of threading.
    * In this implementation we use pointers for mutexes and condition variables.
    * This way, if we forget to init/destroy them the program will crash or ASAN
    * will report leaks.
    */
   
   #define ZSTD_pthread_mutex_t            pthread_mutex_t*
   int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t const* attr);
   int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex);
   #define ZSTD_pthread_mutex_lock(a)      pthread_mutex_lock(*(a))
   #define ZSTD_pthread_mutex_unlock(a)    pthread_mutex_unlock(*(a))
   
   #define ZSTD_pthread_cond_t             pthread_cond_t*
   int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const* attr);
   int ZSTD_pthread_cond_destroy(ZSTD_pthread_cond_t* cond);
   #define ZSTD_pthread_cond_wait(a, b)    pthread_cond_wait(*(a), *(b))
   #define ZSTD_pthread_cond_signal(a)     pthread_cond_signal(*(a))
   #define ZSTD_pthread_cond_broadcast(a)  pthread_cond_broadcast(*(a))
   
   #define ZSTD_pthread_t                  pthread_t
   #define ZSTD_pthread_create(a, b, c, d) pthread_create((a), (b), (c), (d))
   #define ZSTD_pthread_join(a, b)         pthread_join((a),(b))
   
   #endif
   
   #else  /* ZSTD_MULTITHREAD not defined */
   /* No multithreading support */
   
   typedef int ZSTD_pthread_mutex_t;
   #define ZSTD_pthread_mutex_init(a, b)   ((void)(a), (void)(b), 0)
   #define ZSTD_pthread_mutex_destroy(a)   ((void)(a))
   #define ZSTD_pthread_mutex_lock(a)      ((void)(a))
   #define ZSTD_pthread_mutex_unlock(a)    ((void)(a))
   
   typedef int ZSTD_pthread_cond_t;
   #define ZSTD_pthread_cond_init(a, b)    ((void)(a), (void)(b), 0)
   #define ZSTD_pthread_cond_destroy(a)    ((void)(a))
   #define ZSTD_pthread_cond_wait(a, b)    ((void)(a), (void)(b))
   #define ZSTD_pthread_cond_signal(a)     ((void)(a))
   #define ZSTD_pthread_cond_broadcast(a)  ((void)(a))
   
   /* do not use ZSTD_pthread_t */
   
   #endif /* ZSTD_MULTITHREAD */
   
   #if defined (__cplusplus)
   }
   #endif
   
   #endif /* THREADING_H_938743 */

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