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I've made so many changes I don't dare continue until I check the current stuff in. /test/testatomic.c performs absolutely basic tests to show that the function work as expected. Need a second test to do more detailed tests. /include/SDL_atomic.h provides declarations for all included functions. /src/atomic/linux/SDL_atomic.c provided all the functions. On a generic built the 64 bit functions work, but they are emulated. On a build for -march=pentium and above the 64 bit functions use native instructions /src/atomic/dummy/SDL_atomic.c emulates all the operations using SDL_mutex.h. /src/atomic/win32/SDL_atomic.c is a copy of dummy /src/atomic/macosx/SDL_atomic.s is a copy of dummy These versions of SDL_atomic.c provide a frame work for building the library with a mixture of native and emulated functions. This allows the whole library to be provided on all platforms. (I hope.) I hope this fits with the SDL philosophy of either providing a common subset or emulating when the platform is missing a feature. I have not added dummy, macosx, or win32 to the build. They are there as place holders for future work. I have modified congifure.in to compile sources in /src/atomic/linux. (The SDL configure.in file is an amazing piece of work and I hope I didn't mess it up. :-)
author Bob Pendleton <bob@pendleton.com>
date Mon, 29 Jun 2009 19:54:43 +0000
parents 99210400e8b9
children f7b03b6838cb
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/* This file defines a structure that carries language-independent
   error messages
*/

#ifndef _SDL_error_c_h
#define _SDL_error_c_h

#define ERR_MAX_STRLEN	128
#define ERR_MAX_ARGS	5

typedef struct SDL_error
{
    /* This is a numeric value corresponding to the current error */
    int error;

    /* This is a key used to index into a language hashtable containing
       internationalized versions of the SDL error messages.  If the key
       is not in the hashtable, or no hashtable is available, the key is
       used directly as an error message format string.
     */
    char key[ERR_MAX_STRLEN];

    /* These are the arguments for the error functions */
    int argc;
    union
    {
        void *value_ptr;
#if 0                           /* What is a character anyway?  (UNICODE issues) */
        unsigned char value_c;
#endif
        int value_i;
        double value_f;
        char buf[ERR_MAX_STRLEN];
    } args[ERR_MAX_ARGS];
} SDL_error;

#endif /* _SDL_error_c_h */
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