Mercurial > sdl-ios-xcode
view src/main/epoc/SDL_main.cpp @ 968:4675910b0b7b
Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST)
From: Hannu Savolainen
Subject: Re: SDL uses obsolete OSS features
I did some work on getting OSS to work better with SDL. There have been
some problems with select which should be fixed now.
I'm having some problems in understanding what is the purpose of the
DSP_WaitAudio() routine. I added a return to the very beginning of this
routine and commendted out the define for USE_BLOCKING_WRITES. At least
lbreakout2 seems to work as well as earlier. The latencies are the same.
An ordinary blocking write does exactly the same thing than DSP_WaitAudio
does. So I would recommend using the USE_BLOCKING_WRITES approach and
removing everything from the DSP_WaitAudio routine. Also enabling
USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because
you don't need to handle the partial writes (the do-while loop).
Attached is a patch against SDL-1.2.7. After these changes SDL will use
OSS as it's designed to be used (make it as simple as possible). This code
should work with all OSS implementations because it uses only the very
fundamental features that have been there since the jurassic times.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 12 Nov 2004 21:39:04 +0000 |
parents | f6ffac90895c |
children |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 */ /* SDL_main.cpp The Epoc executable startup functions Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) */ #include <e32std.h> #include <e32def.h> #include <e32svr.h> #include <e32base.h> #include <estlib.h> #include <stdlib.h> #include <stdio.h> #include <w32std.h> #include <apgtask.h> #include "SDL_error.h" #ifndef EXPORT_C # ifdef __VC32__ # define IMPORT_C __declspec(dllexport) # define EXPORT_C __declspec(dllexport) # endif # ifdef __GCC32__ # define IMPORT_C # define EXPORT_C __declspec(dllexport) # endif #endif #if defined(__WINS__) #include <estw32.h> IMPORT_C void RegisterWsExe(const TDesC &aName); #endif /* The prototype for the application's main() function */ #define main SDL_main extern "C" int main (int argc, char *argv[], char *envp[]); extern "C" void exit (int ret); /* Epoc main function */ GLDEF_C TInt E32Main() { /* Get the clean-up stack */ CTrapCleanup* cleanup = CTrapCleanup::New(); #if defined(__WINS__) /* arrange for access to Win32 stdin/stdout/stderr */ RWin32Stream::StartServer(); #endif /* Arrange for multi-threaded operation */ SpawnPosixServerThread(); /* Get args and environment */ int argc=0; char** argv=0; char** envp=0; __crt0(argc,argv,envp); #if defined(__WINS__) /* Cause the graphical Window Server to come into existence */ RSemaphore sem; sem.CreateGlobal(_L("WsExeSem"),0); RegisterWsExe(sem.FullName()); #endif /* Start the application! */ /* Create stdlib */ _REENT; /* Set process and thread priority */ RThread currentThread; currentThread.Rename(_L("SdlProgram")); currentThread.SetProcessPriority(EPriorityLow); currentThread.SetPriority(EPriorityMuchLess); /* Call stdlib main */ int ret = main(argc, argv, envp); /* !! process exits here if there is "exit()" in main! */ /* Call exit */ exit(ret); /* !! process exits here! */ /* Free resources and return */ CloseSTDLIB(); delete cleanup; return(KErrNone); } /* Epoc dll entry point */ #if defined(__WINS__) GLDEF_C TInt E32Dll(TDllReason) { return(KErrNone); } EXPORT_C TInt WinsMain(TAny *) { E32Main(); return KErrNone; } #endif