src/mapi/glapi/glapi_dispatch.c

/*
 * Mesa 3-D graphics library
 *
 * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */


/**
 * \file glapi_dispatch.c
 *
 * This file generates all the gl* function entrypoints.  This code is not
 * used if optimized assembly stubs are available (e.g., using
 * glapi/glapi_x86.S on IA32 or glapi/glapi_sparc.S on SPARC).
 *
 * \note
 * This file is also used to build the client-side libGL that loads DRI-based
 * device drivers.  At build-time it is symlinked to src/glx.
 *
 * \author Brian Paul <brian@precisioninsight.com>
 */

#include "glapi/glapi_priv.h"
#include "glapitable.h"


#if !(defined(USE_X86_ASM) || defined(USE_X86_64_ASM) || defined(USE_SPARC_ASM))

#if defined(_WIN32)
#define KEYWORD1 GLAPI
#else
#define KEYWORD1 PUBLIC
#endif

#define KEYWORD2 GLAPIENTRY

#define NAME(func)  gl##func

#if 0  /* Use this to log GL calls to stdout (for DEBUG only!) */

#define F stdout
#define DISPATCH(FUNC, ARGS, MESSAGE)		\
   fprintf MESSAGE;				\
   GET_DISPATCH()->FUNC ARGS

#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) 	\
   fprintf MESSAGE;				\
   return GET_DISPATCH()->FUNC ARGS

#else

#define DISPATCH(FUNC, ARGS, MESSAGE)		\
   GET_DISPATCH()->FUNC ARGS

#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) 	\
   return GET_DISPATCH()->FUNC ARGS

#endif /* logging */

#ifdef GLX_INDIRECT_RENDERING
/* those link to libglapi.a should provide the entry points */
#define _GLAPI_SKIP_PROTO_ENTRY_POINTS
#endif

/* Enable frame pointer elimination on Windows, otherwise forgetting to add
 * GLAPIENTRY to _mesa_* entrypoints will not cause crashes on debug builds, as
 * the initial ESP value is saved in the EBP in the function prologue, then
 * restored on the epilogue, clobbering any corruption in the ESP pointer due
 * to mismatch in the callee calling convention.
 *
 * On MSVC it's not sufficient to enable /Oy -- other optimizations must be
 * enabled or frame pointer will be used regardless.
 *
 * We don't do this when NDEBUG is defined since, frame pointer omission
 * optimization compiler flag are already specified on release builds, and
 * because on profile builds we must have frame pointers or certain profilers
 * might fail to unwind the stack.
 */
#if defined(_WIN32) && !defined(NDEBUG)
#  if defined(_MSC_VER)
#    pragma optimize( "gty", on )
#  elif defined(__GNUC__)
#    pragma GCC optimize ("omit-frame-pointer")
#  endif
#endif

#include "glapitemp.h"

#endif /* USE_X86_ASM */