2 * Mesa 3-D graphics library
4 * Copyright (C) 2010 LunarG Inc.
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:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * 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 OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Chia-I Wu <olv@lunarg.com>
31 #include "u_current.h"
36 /* dynamic stubs will run out before this array */
37 static const struct mapi_stub
*mapi_stub_map
[MAPI_TABLE_NUM_SLOTS
];
38 static int mapi_num_stubs
;
40 static const struct mapi_stub
*
41 get_stub(const char *name
, const struct mapi_stub
*alias
)
43 const struct mapi_stub
*stub
;
45 stub
= stub_find_public(name
);
47 struct mapi_stub
*dyn
= stub_find_dynamic(name
, 1);
49 stub_fix_dynamic(dyn
, alias
);
58 * Initialize mapi. spec consists of NULL-separated strings. The first string
59 * denotes the version. It is followed by variable numbers of entries. Each
60 * entry can have multiple names. An empty name terminates an entry. An empty
61 * entry terminates the spec. A spec of two entries, Foo and Bar, is as
72 mapi_init(const char *spec
)
74 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
80 /* already initialized */
89 /* parse version string */
98 const struct mapi_stub
*stub
;
100 stub
= get_stub(p
, NULL
);
101 /* out of dynamic entries */
111 mapi_stub_map
[count
++] = stub
;
115 mapi_num_stubs
= count
;
121 * Return the address of an entry. Optionally generate the entry if it does
125 mapi_get_proc_address(const char *name
)
127 const struct mapi_stub
*stub
;
129 stub
= stub_find_public(name
);
131 stub
= stub_find_dynamic(name
, 0);
133 return (stub
) ? (mapi_proc
) stub_get_addr(stub
) : NULL
;
137 * Create a dispatch table.
140 mapi_table_create(void)
142 const struct mapi_table
*noop
= table_get_noop();
143 struct mapi_table
*tbl
;
145 tbl
= malloc(MAPI_TABLE_SIZE
);
147 memcpy(tbl
, noop
, MAPI_TABLE_SIZE
);
153 * Destroy a dispatch table.
156 mapi_table_destroy(struct mapi_table
*tbl
)
162 * Fill a dispatch table. The order of the procs is determined when mapi_init
166 mapi_table_fill(struct mapi_table
*tbl
, const mapi_proc
*procs
)
168 const struct mapi_table
*noop
= table_get_noop();
171 for (i
= 0; i
< mapi_num_stubs
; i
++) {
172 const struct mapi_stub
*stub
= mapi_stub_map
[i
];
173 int slot
= stub_get_slot(stub
);
174 mapi_func func
= (mapi_func
) procs
[i
];
177 func
= table_get_func(noop
, slot
);
178 table_set_func(tbl
, slot
, func
);
183 * Make a dispatch table current.
186 mapi_table_make_current(const struct mapi_table
*tbl
)
188 u_current_set_table(tbl
);