1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2010 LunarG Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * Chia-I Wu <[email protected]>
27 */
28
29 #include <string.h>
30 #include <stdlib.h>
31 #include "glapi/glapi.h"
32 #include "u_current.h"
33 #include "table.h" /* for MAPI_TABLE_NUM_SLOTS */
34 #include "stub.h"
35
36 /*
37 * _glapi_Dispatch, _glapi_Context
38 * _glapi_tls_Dispatch, _glapi_tls_Context,
39 * _glapi_set_context, _glapi_get_context,
40 * _glapi_destroy_multithread, _glapi_check_multithread
41 * _glapi_set_dispatch, and _glapi_get_dispatch
42 * are defined in u_current.c.
43 */
44
45 /**
46 * Return size of dispatch table struct as number of functions (or
47 * slots).
48 */
49 unsigned int
_glapi_get_dispatch_table_size(void)50 _glapi_get_dispatch_table_size(void)
51 {
52 return MAPI_TABLE_NUM_SLOTS;
53 }
54
55 /**
56 * Initializes the glapi relocs table (no-op for shared-glapi), and returns the
57 * offset of the given function in the dispatch table.
58 */
59 int
_glapi_add_dispatch(const char * function_name)60 _glapi_add_dispatch( const char * function_name )
61 {
62 assert(function_name[0] == 'g' && function_name[1] == 'l');
63
64 const struct mapi_stub *stub = stub_find_public(function_name + 2);
65 if (!stub)
66 return -1;
67
68 return stub_get_slot(stub);
69 }
70
71 static const struct mapi_stub *
_glapi_get_stub(const char * name)72 _glapi_get_stub(const char *name)
73 {
74 if (!name || name[0] != 'g' || name[1] != 'l')
75 return NULL;
76 name += 2;
77
78 return stub_find_public(name);
79 }
80
81 /**
82 * Return offset of entrypoint for named function within dispatch table.
83 */
84 int
_glapi_get_proc_offset(const char * funcName)85 _glapi_get_proc_offset(const char *funcName)
86 {
87 const struct mapi_stub *stub = _glapi_get_stub(funcName);
88 return (stub) ? stub_get_slot(stub) : -1;
89 }
90
91 /**
92 * Return pointer to the named function. If the function name isn't found
93 * in the name of static functions, try generating a new API entrypoint on
94 * the fly with assembly language.
95 */
96 _glapi_proc
_glapi_get_proc_address(const char * funcName)97 _glapi_get_proc_address(const char *funcName)
98 {
99 const struct mapi_stub *stub = _glapi_get_stub(funcName);
100 return (stub) ? (_glapi_proc) stub_get_addr(stub) : NULL;
101 }
102
103 /**
104 * Return the name of the function at the given dispatch offset.
105 * This is only intended for debugging.
106 */
107 const char *
_glapi_get_proc_name(unsigned int offset)108 _glapi_get_proc_name(unsigned int offset)
109 {
110 const struct mapi_stub *stub = stub_find_by_slot(offset);
111 return stub ? stub_get_name(stub) : NULL;
112 }
113
114 /** Return pointer to new dispatch table filled with no-op functions */
115 struct _glapi_table *
_glapi_new_nop_table(unsigned num_entries)116 _glapi_new_nop_table(unsigned num_entries)
117 {
118 struct _glapi_table *table;
119
120 if (num_entries > MAPI_TABLE_NUM_SLOTS)
121 num_entries = MAPI_TABLE_NUM_SLOTS;
122
123 table = malloc(num_entries * sizeof(mapi_func));
124 if (table) {
125 memcpy(table, table_noop_array, num_entries * sizeof(mapi_func));
126 }
127 return table;
128 }
129
130 void
_glapi_set_nop_handler(_glapi_nop_handler_proc func)131 _glapi_set_nop_handler(_glapi_nop_handler_proc func)
132 {
133 table_set_noop_handler(func);
134 }
135
136 /**
137 * This is a deprecated function which should not be used anymore.
138 * It's only present to satisfy linking with older versions of libGL.
139 */
140 unsigned long
_glthread_GetID(void)141 _glthread_GetID(void)
142 {
143 return 0;
144 }
145
146 void
_glapi_noop_enable_warnings(unsigned char enable)147 _glapi_noop_enable_warnings(unsigned char enable)
148 {
149 }
150
151 void
_glapi_set_warning_func(_glapi_proc func)152 _glapi_set_warning_func(_glapi_proc func)
153 {
154 }
155