Mercurial > sdl-ios-xcode
view src/thread/amigaos/SDL_syssem.c @ 1120:8e1fde455471
Patch by me to fix crash described below.
--ryan.
To: sdl@libsdl.org
From: Rainer Deyke <rainerd@eldwood.com>
Date: Tue, 16 Aug 2005 01:08:18 -0600
Subject: [SDL] Bug report: SDL_CreateRGBSurface with SDL_HWSURFACE crashes
If SDL is in full-screen mode with a hardware video surface on OS X,
SDL_CreateRGBSurface with SDL_HWSURFACE crashes. The crash occurs on
line 109 of SDL_Surface.c. This was tested on OS X 10.3.9 with both SDL
1.2.8 and the latest CVS. Here is a small C++ program that demonstrates
the problem:
#include "SDL.h"
#include <stdio.h>
namespace {
void wait_for_key()
{
SDL_Event e;
printf("%d\n", SDL_GetAppState());
while (SDL_WaitEvent(&e)) {
if (e.type == SDL_KEYDOWN || e.type == SDL_QUIT) return;
}
}
}
int main(int, char *[])
{
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface *screen
= SDL_SetVideoMode(640, 480, 32, SDL_FULLSCREEN | SDL_HWSURFACE);
SDL_Surface *s = SDL_CreateRGBSurface(SDL_HWSURFACE, 640, 480, 32,
screen->format->Rmask, screen->format->Gmask,
screen->format->Bmask, screen->format->Amask);
wait_for_key();
if (s) SDL_FreeSurface(s);
SDL_Quit();
printf("Success!\n");
return 0;
}
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 18 Aug 2005 06:46:32 +0000 |
parents | b8d311d90021 |
children | c9b51268668f |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* An implementation of semaphores using mutexes and condition variables */ #include "SDL_error.h" #include "SDL_thread.h" #include "SDL_systhread_c.h" struct SDL_semaphore { struct SignalSemaphore Sem; Uint32 count; Uint32 waiters_count; SDL_mutex *count_lock; SDL_cond *count_nonzero; }; #undef D #define D(x) SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) { SDL_sem *sem; sem = (SDL_sem *)malloc(sizeof(*sem)); if ( ! sem ) { SDL_OutOfMemory(); return(0); } D(bug("Creating semaphore %lx...\n",sem)); memset(sem,0,sizeof(*sem)); InitSemaphore(&sem->Sem); return(sem); } void SDL_DestroySemaphore(SDL_sem *sem) { D(bug("Destroying semaphore %lx...\n",sem)); if ( sem ) { // Condizioni per liberare i task in attesa? free(sem); } } int SDL_SemTryWait(SDL_sem *sem) { if ( ! sem ) { SDL_SetError("Passed a NULL semaphore"); return -1; } D(bug("TryWait semaphore...%lx\n",sem)); ObtainSemaphore(&sem->Sem); // ReleaseSemaphore(&sem->Sem); return 1; } int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) { int retval; if ( ! sem ) { SDL_SetError("Passed a NULL semaphore"); return -1; } D(bug("WaitTimeout (%ld) semaphore...%lx\n",timeout,sem)); /* A timeout of 0 is an easy case */ if ( timeout == 0 ) { return SDL_SemTryWait(sem); } /* SDL_LockMutex(sem->count_lock); ++sem->waiters_count; retval = 0; while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) { retval = SDL_CondWaitTimeout(sem->count_nonzero, sem->count_lock, timeout); } --sem->waiters_count; --sem->count; SDL_UnlockMutex(sem->count_lock); */ if(!(retval=AttemptSemaphore(&sem->Sem))) { SDL_Delay(timeout); retval=AttemptSemaphore(&sem->Sem); } if(retval==TRUE) { // ReleaseSemaphore(&sem->Sem); retval=1; } return retval; } int SDL_SemWait(SDL_sem *sem) { ObtainSemaphore(&sem->Sem); return 0; // return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); } Uint32 SDL_SemValue(SDL_sem *sem) { Uint32 value; value = 0; if ( sem ) { #ifdef STORMC4_WOS value = sem->Sem.ssppc_SS.ss_NestCount; #else value = sem->Sem.ss_NestCount; #endif // SDL_UnlockMutex(sem->count_lock); } return value; } int SDL_SemPost(SDL_sem *sem) { if ( ! sem ) { SDL_SetError("Passed a NULL semaphore"); return -1; } D(bug("SemPost semaphore...%lx\n",sem)); ReleaseSemaphore(&sem->Sem); #if 0 SDL_LockMutex(sem->count_lock); if ( sem->waiters_count > 0 ) { SDL_CondSignal(sem->count_nonzero); } ++sem->count; SDL_UnlockMutex(sem->count_lock); #endif return 0; }