kc3-lang/SDL/src/thread/psp/SDL_sysmutex.c

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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/psp/SDL_sysmutex.c

• /*
    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"
  
  #if SDL_THREAD_PSP
  
  /* An implementation of mutexes using semaphores */
  
  #include "SDL_thread.h"
  #include "SDL_systhread_c.h"
  
  #include <pspthreadman.h>
  #include <pspkerror.h>
  
  #define SCE_KERNEL_MUTEX_ATTR_RECURSIVE 0x0200U
  
  struct SDL_mutex
  {
      SceLwMutexWorkarea lock;
  };
  
  /* Create a mutex */
  SDL_mutex *
  SDL_CreateMutex(void)
  {
      SDL_mutex *mutex = NULL;
      SceInt32 res = 0;
  
      /* Allocate mutex memory */
      mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
      if (mutex) {
  
          res = sceKernelCreateLwMutex(
              &mutex->lock,
              "SDL mutex",
              SCE_KERNEL_MUTEX_ATTR_RECURSIVE,
              0,
              NULL
          );
  
          if (res < 0) {
              SDL_SetError("Error trying to create mutex: %x", res);
          }
      } else {
          SDL_OutOfMemory();
      }
      return mutex;
  }
  
  /* Free the mutex */
  void
  SDL_DestroyMutex(SDL_mutex * mutex)
  {
      if (mutex) {
          sceKernelDeleteLwMutex(&mutex->lock);
          SDL_free(mutex);
      }
  }
  
  /* Try to lock the mutex */
  int
  SDL_TryLockMutex(SDL_mutex * mutex)
  {
  #if SDL_THREADS_DISABLED
      return 0;
  #else
      SceInt32 res = 0;
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      res = sceKernelTryLockLwMutex(&mutex->lock, 1);
      switch (res) {
          case SCE_KERNEL_ERROR_OK:
              return 0;
              break;
          case SCE_KERNEL_ERROR_WAIT_TIMEOUT:
              return SDL_MUTEX_TIMEDOUT;
              break;
          default:
              return SDL_SetError("Error trying to lock mutex: %x", res);
              break;
      }
  
      return -1;
  #endif /* SDL_THREADS_DISABLED */
  }
  
  
  /* Lock the mutex */
  int
  SDL_mutexP(SDL_mutex * mutex)
  {
  #if SDL_THREADS_DISABLED
      return 0;
  #else
      SceInt32 res = 0;
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      res = sceKernelLockLwMutex(&mutex->lock, 1, NULL);
      if (res != SCE_KERNEL_ERROR_OK) {
          return SDL_SetError("Error trying to lock mutex: %x", res);
      }
  
      return 0;
  #endif /* SDL_THREADS_DISABLED */
  }
  
  /* Unlock the mutex */
  int
  SDL_mutexV(SDL_mutex * mutex)
  {
  #if SDL_THREADS_DISABLED
      return 0;
  #else
      SceInt32 res = 0;
  
      if (mutex == NULL) {
          return SDL_InvalidParamError("mutex");
      }
  
      res = sceKernelUnlockLwMutex(&mutex->lock, 1);
      if (res != 0) {
          return SDL_SetError("Error trying to unlock mutex: %x", res);
      }
  
      return 0;
  #endif /* SDL_THREADS_DISABLED */
  }
  #endif /* SDL_THREAD_PSP */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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