glapi_priv.h

/*
 * Mesa 3-D graphics library
 *
 * Copyright (C) 1999-2008  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.
 */


#ifndef _GLAPI_PRIV_H
#define _GLAPI_PRIV_H


#define GL_GLEXT_PROTOTYPES
#include "GL/gl.h"
#include "GL/glext.h"

typedef int GLclampx;

#include "glapi/glapi.h"


#ifdef __cplusplus
extern "C" {
#endif

/* entrypoint */

extern void
init_glapi_relocs_once(void);


extern _glapi_proc
generate_entrypoint(unsigned int functionOffset);


extern void
fill_in_entrypoint_offset(_glapi_proc entrypoint, unsigned int offset);


extern _glapi_proc
get_entrypoint_address(unsigned int functionOffset);


/**
 * Size (in bytes) of dispatch function (entrypoint).
 */
#if defined(USE_X86_ASM)
# if defined(USE_ELF_TLS)
#  define DISPATCH_FUNCTION_SIZE  16
# else
#  define DISPATCH_FUNCTION_SIZE  32
# endif
#endif

#if defined(USE_X64_64_ASM)
# if defined(USE_ELF_TLS)
#  define DISPATCH_FUNCTION_SIZE  16
# endif
#endif


/**
 * Number of extension functions which we can dynamically add at runtime.
 *
 * Number of extension functions is also subject to the size of backing exec
 * mem we allocate. For the common case of dispatch stubs with size 16 bytes,
 * the two limits will be hit simultaneously. For larger dispatch function
 * sizes, MAX_EXTENSION_FUNCS is effectively reduced.
 */
#define MAX_EXTENSION_FUNCS 256


#ifdef __cplusplus
}
#endif

#endif