2 * Mesa 3-D graphics library
5 * Copyright (C) 2010 LunarG Inc.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
26 * Chia-I Wu <olv@lunarg.com>
33 #include "u_current.h"
39 #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
47 /* define public_string_pool and public_stubs */
48 #define MAPI_TMP_PUBLIC_STUBS
51 static struct mapi_stub dynamic_stubs[MAPI_TABLE_NUM_DYNAMIC];
52 static int num_dynamic_stubs;
53 static int next_dynamic_slot = MAPI_TABLE_NUM_STATIC;
59 static pthread_once_t once = PTHREAD_ONCE_INIT;
60 pthread_once(&once, entry_patch_public);
71 stub_compare(const void *key, const void *elem)
73 const char *name = (const char *) key;
74 const struct mapi_stub *stub = (const struct mapi_stub *) elem;
75 const char *stub_name;
77 stub_name = &public_string_pool[(unsigned long) stub->name];
79 return strcmp(name, stub_name);
83 * Return the public stub with the given name.
85 const struct mapi_stub *
86 stub_find_public(const char *name)
88 return (const struct mapi_stub *) bsearch(name, public_stubs,
89 ARRAY_SIZE(public_stubs), sizeof(public_stubs[0]), stub_compare);
95 static struct mapi_stub *
96 stub_add_dynamic(const char *name)
98 struct mapi_stub *stub;
101 idx = num_dynamic_stubs;
102 /* minus 1 to make sure we can never reach the last slot */
103 if (idx >= MAPI_TABLE_NUM_DYNAMIC - 1)
106 stub = &dynamic_stubs[idx];
108 /* dispatch to the last slot, which is reserved for no-op */
109 stub->addr = entry_generate(
110 MAPI_TABLE_NUM_STATIC + MAPI_TABLE_NUM_DYNAMIC - 1);
114 stub->name = (const void *) name;
115 /* to be fixed later */
118 num_dynamic_stubs = idx + 1;
124 * Return the dynamic stub with the given name. If no such stub exists and
125 * generate is true, a new stub is generated.
128 stub_find_dynamic(const char *name, int generate)
130 u_mutex_declare_static(dynamic_mutex);
131 struct mapi_stub *stub = NULL;
134 u_mutex_lock(dynamic_mutex);
137 assert(!stub_find_public(name));
139 count = num_dynamic_stubs;
140 for (i = 0; i < count; i++) {
141 if (strcmp(name, (const char *) dynamic_stubs[i].name) == 0) {
142 stub = &dynamic_stubs[i];
147 /* generate a dynamic stub */
148 if (generate && !stub)
149 stub = stub_add_dynamic(name);
151 u_mutex_unlock(dynamic_mutex);
157 stub_fix_dynamic(struct mapi_stub *stub, const struct mapi_stub *alias)
167 slot = next_dynamic_slot++;
169 entry_patch(stub->addr, slot);
174 * Return the name of a stub.
177 stub_get_name(const struct mapi_stub *stub)
181 if (stub >= public_stubs &&
182 stub < public_stubs + ARRAY_SIZE(public_stubs))
183 name = &public_string_pool[(unsigned long) stub->name];
185 name = (const char *) stub->name;
191 * Return the slot of a stub.
194 stub_get_slot(const struct mapi_stub *stub)
200 * Return the address of a stub.
203 stub_get_addr(const struct mapi_stub *stub)
205 assert(stub->addr || (unsigned int) stub->slot < MAPI_TABLE_NUM_STATIC);
206 return (stub->addr) ? stub->addr : entry_get_public(stub->slot);