1 /* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 26 #ifndef _GLAPI_PRIV_H 27 #define _GLAPI_PRIV_H 28 29 30 #define GL_GLEXT_PROTOTYPES 31 #include "GL/gl.h" 32 #include "GL/glext.h" 33 34 typedef int GLclampx; 35 36 #include "glapi/glapi.h" 37 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* entrypoint */ 44 45 extern void 46 init_glapi_relocs_once(void); 47 48 49 extern _glapi_proc 50 generate_entrypoint(unsigned int functionOffset); 51 52 53 extern void 54 fill_in_entrypoint_offset(_glapi_proc entrypoint, unsigned int offset); 55 56 57 extern _glapi_proc 58 get_entrypoint_address(unsigned int functionOffset); 59 60 61 /** 62 * Size (in bytes) of dispatch function (entrypoint). 63 */ 64 #if defined(USE_X86_ASM) 65 # if defined(USE_ELF_TLS) 66 # define DISPATCH_FUNCTION_SIZE 16 67 # else 68 # define DISPATCH_FUNCTION_SIZE 32 69 # endif 70 #endif 71 72 #if defined(USE_X64_64_ASM) 73 # if defined(USE_ELF_TLS) 74 # define DISPATCH_FUNCTION_SIZE 16 75 # endif 76 #endif 77 78 79 /** 80 * Number of extension functions which we can dynamically add at runtime. 81 * 82 * Number of extension functions is also subject to the size of backing exec 83 * mem we allocate. For the common case of dispatch stubs with size 16 bytes, 84 * the two limits will be hit simultaneously. For larger dispatch function 85 * sizes, MAX_EXTENSION_FUNCS is effectively reduced. 86 */ 87 #define MAX_EXTENSION_FUNCS 256 88 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif 95