kc3-lang/SDL/src/thread/ngage/SDL_syssem.cpp

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• Hash : b8d85c69
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  Date : 2022-11-30T12:51:59
  

  Update for SDL3 coding style (#6717) I updated .clang-format and ran clang-format 14 over the src and test directories to standardize the code base. In general I let clang-format have it's way, and added markup to prevent formatting of code that would break or be completely unreadable if formatted. The script I ran for the src directory is added as build-scripts/clang-format-src.sh This fixes: #6592 #6593 #6594 (cherry picked from commit 5750bcb174300011b91d1de20edb288fcca70f8c)

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• src/thread/ngage/SDL_syssem.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"
  
  /* An implementation of semaphores using the Symbian API. */
  
  #include <e32std.h>
  
  #include "SDL_error.h"
  #include "SDL_thread.h"
  
  #define SDL_MUTEX_TIMEOUT -2
  
  struct SDL_semaphore
  {
      TInt handle;
      TInt count;
  };
  
  struct TInfo
  {
      TInfo(TInt aTime, TInt aHandle) : iTime(aTime), iHandle(aHandle), iVal(0) {}
      TInt iTime;
      TInt iHandle;
      TInt iVal;
  };
  
  extern TInt CreateUnique(TInt (*aFunc)(const TDesC &aName, TAny *, TAny *), TAny *, TAny *);
  
  static TBool RunThread(TAny *aInfo)
  {
      TInfo *info = STATIC_CAST(TInfo *, aInfo);
      User::After(info->iTime);
      RSemaphore sema;
      sema.SetHandle(info->iHandle);
      sema.Signal();
      info->iVal = SDL_MUTEX_TIMEOUT;
      return 0;
  }
  
  static TInt NewThread(const TDesC &aName, TAny *aPtr1, TAny *aPtr2)
  {
      return ((RThread *)(aPtr1))->Create(aName, RunThread, KDefaultStackSize, NULL, aPtr2);
  }
  
  static TInt NewSema(const TDesC &aName, TAny *aPtr1, TAny *aPtr2)
  {
      TInt value = *((TInt *)aPtr2);
      return ((RSemaphore *)aPtr1)->CreateGlobal(aName, value);
  }
  
  static void WaitAll(SDL_sem *sem)
  {
      RSemaphore sema;
      sema.SetHandle(sem->handle);
      sema.Wait();
      while (sem->count < 0) {
          sema.Wait();
      }
  }
  
  SDL_sem *
  SDL_CreateSemaphore(Uint32 initial_value)
  {
      RSemaphore s;
      TInt status = CreateUnique(NewSema, &s, &initial_value);
      if (status != KErrNone) {
          SDL_SetError("Couldn't create semaphore");
      }
      SDL_semaphore *sem = new /*(ELeave)*/ SDL_semaphore;
      sem->handle = s.Handle();
      sem->count = initial_value;
      return sem;
  }
  
  void SDL_DestroySemaphore(SDL_sem *sem)
  {
      if (sem != NULL) {
          RSemaphore sema;
          sema.SetHandle(sem->handle);
          sema.Signal(sema.Count());
          sema.Close();
          delete sem;
          sem = NULL;
      }
  }
  
  int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
  {
      if (sem == NULL) {
          return SDL_InvalidParamError("sem");
      }
  
      if (timeout == SDL_MUTEX_MAXWAIT) {
          WaitAll(sem);
          return SDL_MUTEX_MAXWAIT;
      }
  
      RThread thread;
      TInfo *info = new (ELeave) TInfo(timeout, sem->handle);
      TInt status = CreateUnique(NewThread, &thread, info);
  
      if (status != KErrNone) {
          return status;
      }
  
      thread.Resume();
      WaitAll(sem);
  
      if (thread.ExitType() == EExitPending) {
          thread.Kill(SDL_MUTEX_TIMEOUT);
      }
  
      thread.Close();
      return info->iVal;
  }
  
  int SDL_SemTryWait(SDL_sem *sem)
  {
      if (sem == NULL) {
          return SDL_InvalidParamError("sem");
      }
  
      if (sem->count > 0) {
          sem->count--;
      }
      return SDL_MUTEX_TIMEOUT;
  }
  
  int SDL_SemWait(SDL_sem *sem)
  {
      return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
  }
  
  Uint32
  SDL_SemValue(SDL_sem *sem)
  {
      if (sem == NULL) {
          SDL_InvalidParamError("sem");
          return 0;
      }
      return sem->count;
  }
  
  int SDL_SemPost(SDL_sem *sem)
  {
      if (sem == NULL) {
          return SDL_InvalidParamError("sem");
      }
      sem->count++;
      RSemaphore sema;
      sema.SetHandle(sem->handle);
      sema.Signal();
      return 0;
  }
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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