src/mesa/main/dispatch.c

   1 /* $Id: dispatch.c,v 1.17 2000/12/26 05:09:28 keithw Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /*
  29  * This file generates all the gl* function entyrpoints.
  30  * But if we're using X86-optimized dispatch (X86/glapi_x86.S) then
  31  * each of the entrypoints will be prefixed with _glapi_fallback_*
  32  * and will be called by the glapi_x86.S code when we're in thread-
  33  * safe mode.
  34  *
  35  * Eventually this file may be replaced by automatically generated
  36  * code from an API spec file.
  37  *
  38  * NOTE: This file should _not_ be used when compiling Mesa for a DRI-
  39  * based device driver.
  40  *
  41  */
  42
  43
  44
  45 #ifdef PC_HEADER
  46 #include "all.h"
  47 #else
  48 #include "glheader.h"
  49 #include "glapi.h"
  50 #include "glapitable.h"
  51 #endif
  52
  53
  54
  55 #define KEYWORD1
  56 #define KEYWORD2 GLAPIENTRY
  57 #if defined(USE_X86_ASM) && !defined(__WIN32__) && !defined(XF86DRI)
  58 #define NAME(func) _glapi_fallback_##func
  59 #elif defined(USE_MGL_NAMESPACE)
  60 #define NAME(func)  mgl##func
  61 #else
  62 #define NAME(func)  gl##func
  63 #endif
  64
  65 #ifdef DEBUG
  66
  67 #if 0
  68 static int
  69 trace(void)
  70 {
  71    static int trace = -1;
  72    if (trace < 0)
  73       trace = getenv("MESA_TRACE") ? 1 : 0;
  74    return trace > 0;
  75 }
  76 #endif
  77
  78 #define F stderr
  79
  80 #define DISPATCH(FUNC, ARGS, MESSAGE)                                   \
  81    const struct _glapi_table *dispatch;                                 \
  82    dispatch = _glapi_Dispatch ? _glapi_Dispatch : _glapi_get_dispatch();\
  83    (dispatch->FUNC) ARGS
  84
  85 #define RETURN_DISPATCH(FUNC, ARGS, MESSAGE)                            \
  86    const struct _glapi_table *dispatch;                                 \
  87    dispatch = _glapi_Dispatch ? _glapi_Dispatch : _glapi_get_dispatch();\
  88    return (dispatch->FUNC) ARGS
  89
  90 #if 0
  91    /* From both macros above... */
  92    if (trace()) {                                                       \
  93       fprintf MESSAGE;                                                  \
  94       fprintf(F, "\n");                                                 \
  95    }
  96 #endif
  97
  98 #else
  99
 100 #ifdef THREADS
 101
 102 #define DISPATCH(FUNC, ARGS, MESSAGE)                                   \
 103    const struct _glapi_table *dispatch;                                 \
 104    dispatch = _glapi_Dispatch ? _glapi_Dispatch : _glapi_get_dispatch();\
 105    (dispatch->FUNC) ARGS
 106
 107 #define RETURN_DISPATCH(FUNC, ARGS, MESSAGE)                            \
 108    const struct _glapi_table *dispatch;                                 \
 109    dispatch = _glapi_Dispatch ? _glapi_Dispatch : _glapi_get_dispatch();\
 110    return (dispatch->FUNC) ARGS
 111
 112 #else
 113
 114
 115 #define DISPATCH(FUNC, ARGS, MESSAGE) \
 116 __asm__  ("jmp    *(%%eax) ;" : : "a" (&(_glapi_Dispatch->FUNC)) )
 117
 118 #define RETURN_DISPATCH(FUNC, ARGS, MESSAGE)                            \
 119    const struct _glapi_table *dispatch;                                 \
 120    dispatch = _glapi_Dispatch;\
 121    return (dispatch->FUNC) ARGS
 122
 123 #endif
 124
 125 #endif
 126
 127
 128 #ifndef GLAPIENTRY
 129 #define GLAPIENTRY
 130 #endif
 131
 132 #define DO_GEOMETRY
 133 #include "glapitemp.h"
 134