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>
32 #include "u_current.h"
38 /* dynamic stubs will run out before this array */
39 static const struct mapi_stub *mapi_stub_map[MAPI_TABLE_NUM_SLOTS];
40 static int mapi_num_stubs;
42 static const struct mapi_stub *
43 get_stub(const char *name, const struct mapi_stub *alias)
45 const struct mapi_stub *stub;
47 stub = stub_find_public(name);
49 struct mapi_stub *dyn = stub_find_dynamic(name, 1);
51 stub_fix_dynamic(dyn, alias);
60 * Initialize mapi. spec consists of NULL-separated strings. The first string
61 * denotes the version. It is followed by variable numbers of entries. Each
62 * entry can have multiple names. An empty name terminates an entry. An empty
63 * entry terminates the spec. A spec of two entries, Foo and Bar, is as
74 mapi_init(const char *spec)
76 u_mutex_declare_static(mutex);
82 /* already initialized */
84 u_mutex_unlock(mutex);
91 /* parse version string */
94 u_mutex_unlock(mutex);
100 const struct mapi_stub *stub;
102 stub = get_stub(p, NULL);
103 /* out of dynamic entries */
113 mapi_stub_map[count++] = stub;
117 mapi_num_stubs = count;
119 u_mutex_unlock(mutex);
123 * Return the address of an entry. Optionally generate the entry if it does
127 mapi_get_proc_address(const char *name)
129 const struct mapi_stub *stub;
131 stub = stub_find_public(name);
133 stub = stub_find_dynamic(name, 0);
135 return (stub) ? (mapi_proc) stub_get_addr(stub) : NULL;
139 * Create a dispatch table.
142 mapi_table_create(void)
144 const struct mapi_table *noop = table_get_noop();
145 struct mapi_table *tbl;
147 tbl = malloc(MAPI_TABLE_SIZE);
149 memcpy(tbl, noop, MAPI_TABLE_SIZE);
155 * Destroy a dispatch table.
158 mapi_table_destroy(struct mapi_table *tbl)
164 * Fill a dispatch table. The order of the procs is determined when mapi_init
168 mapi_table_fill(struct mapi_table *tbl, const mapi_proc *procs)
170 const struct mapi_table *noop = table_get_noop();
173 for (i = 0; i < mapi_num_stubs; i++) {
174 const struct mapi_stub *stub = mapi_stub_map[i];
175 int slot = stub_get_slot(stub);
176 mapi_func func = (mapi_func) procs[i];
179 func = table_get_func(noop, slot);
180 table_set_func(tbl, slot, func);
185 * Make a dispatch table current.
188 mapi_table_make_current(const struct mapi_table *tbl)