kc3-lang/SDL/src/thread/stdcpp/SDL_sysmutex.cpp

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• Hash : ebdd5366
  Author :
  Date : 2022-01-17T16:26:02
  

  use SDL_InvalidParamError or SDL_assert instead of custom SDL_SetError

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• src/thread/stdcpp/SDL_sysmutex.cpp

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2022 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"
  
  extern "C" {
  #include "SDL_thread.h"
  #include "SDL_systhread_c.h"
  }
  
  #include <system_error>
  
  #include "SDL_sysmutex_c.h"
  #include <Windows.h>
  
  
  /* Create a mutex */
  extern "C"
  SDL_mutex *
  SDL_CreateMutex(void)
  {
      /* Allocate and initialize the mutex */
      try {
          SDL_mutex * mutex = new SDL_mutex;
          return mutex;
      } catch (std::system_error & ex) {
          SDL_SetError("unable to create a C++ mutex: code=%d; %s", ex.code(), ex.what());
          return NULL;
      } catch (std::bad_alloc &) {
          SDL_OutOfMemory();
          return NULL;
      }
  }
  
  /* Free the mutex */
  extern "C"
  void
  SDL_DestroyMutex(SDL_mutex * mutex)
  {
      if (mutex) {
          delete mutex;
      }
  }
  
  /* Lock the semaphore */
  extern "C"
  int
  SDL_mutexP(SDL_mutex * mutex)
  {
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      try {
          mutex->cpp_mutex.lock();
          return 0;
      } catch (std::system_error & ex) {
          return SDL_SetError("unable to lock a C++ mutex: code=%d; %s", ex.code(), ex.what());
      }
  }
  
  /* TryLock the mutex */
  int
  SDL_TryLockMutex(SDL_mutex * mutex)
  {
      int retval = 0;
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      if (mutex->cpp_mutex.try_lock() == false) {
          retval = SDL_MUTEX_TIMEDOUT;
      }
      return retval;
  }
  
  /* Unlock the mutex */
  extern "C"
  int
  SDL_mutexV(SDL_mutex * mutex)
  {
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      mutex->cpp_mutex.unlock();
      return 0;
  }
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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