kc3-lang/SDL/src/thread/windows/SDL_sysmutex_c.h

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• Hash : 5dccffd7
  Author :
  Date : 2021-08-23T21:16:58
  

  Allow usage of the new Condition Variable code with Critical Sections Vista and later provide the SleepConditionVariableCS() function for this. Since SDL_syscond_srw.c doesn't require SRW locks anymore, rename it to SDL_syscond_cv.c which better reflects the implementation of condition variables rather than the implementation of mutexes. Fixes #4051.

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• src/thread/windows/SDL_sysmutex_c.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "../../SDL_internal.h"
  
  #include "../../core/windows/SDL_windows.h"
  
  #include "SDL_mutex.h"
  
  typedef SDL_mutex * (*pfnSDL_CreateMutex)(void);
  typedef int (*pfnSDL_LockMutex)(SDL_mutex *);
  typedef int (*pfnSDL_TryLockMutex)(SDL_mutex *);
  typedef int (*pfnSDL_UnlockMutex)(SDL_mutex *);
  typedef void (*pfnSDL_DestroyMutex)(SDL_mutex *);
  
  typedef enum
  {
      SDL_MUTEX_INVALID = 0,
      SDL_MUTEX_SRW,
      SDL_MUTEX_CS,
  } SDL_MutexType;
  
  typedef struct SDL_mutex_impl_t
  {
      pfnSDL_CreateMutex  Create;
      pfnSDL_DestroyMutex Destroy;
      pfnSDL_LockMutex    Lock;
      pfnSDL_TryLockMutex TryLock;
      pfnSDL_UnlockMutex  Unlock;
      /* Needed by SDL_cond: */
      SDL_MutexType       Type;
  } SDL_mutex_impl_t;
  
  extern SDL_mutex_impl_t SDL_mutex_impl_active;
  
  
  #ifndef SRWLOCK_INIT
  #define SRWLOCK_INIT {0}
  typedef struct _SRWLOCK {
      PVOID Ptr;
  } SRWLOCK, *PSRWLOCK;
  #endif
  
  typedef struct SDL_mutex_srw
  {
      SRWLOCK srw;
      /* SRW Locks are not recursive, that has to be handled by SDL: */
      DWORD count;
      DWORD owner;
  } SDL_mutex_srw;
  
  typedef struct SDL_mutex_cs
  {
      CRITICAL_SECTION cs;
  } SDL_mutex_cs;
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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