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"
37 /* dynamic stubs will run out before this array */
38 static const struct mapi_stub
*mapi_stub_map
[MAPI_TABLE_NUM_SLOTS
];
39 static int mapi_num_stubs
;
41 static const struct mapi_stub
*
42 get_stub(const char *name
, const struct mapi_stub
*alias
)
44 const struct mapi_stub
*stub
;
46 stub
= stub_find_public(name
);
48 struct mapi_stub
*dyn
= stub_find_dynamic(name
, 1);
50 stub_fix_dynamic(dyn
, alias
);
59 * Initialize mapi. spec consists of NULL-separated strings. The first string
60 * denotes the version. It is followed by variable numbers of entries. Each
61 * entry can have multiple names. An empty name terminates an entry. An empty
62 * entry terminates the spec. A spec of two entries, Foo and Bar, is as
73 mapi_init(const char *spec
)
75 u_mutex_declare_static(mutex
);
81 /* already initialized */
83 u_mutex_unlock(mutex
);
90 /* parse version string */
93 u_mutex_unlock(mutex
);
99 const struct mapi_stub
*stub
;
101 stub
= get_stub(p
, NULL
);
102 /* out of dynamic entries */
112 mapi_stub_map
[count
++] = stub
;
116 mapi_num_stubs
= count
;
118 u_mutex_unlock(mutex
);
122 * Return the address of an entry. Optionally generate the entry if it does
126 mapi_get_proc_address(const char *name
)
128 const struct mapi_stub
*stub
;
130 stub
= stub_find_public(name
);
132 stub
= stub_find_dynamic(name
, 0);
134 return (stub
) ? (mapi_proc
) stub_get_addr(stub
) : NULL
;
138 * Create a dispatch table.
141 mapi_table_create(void)
143 const struct mapi_table
*noop
= table_get_noop();
144 struct mapi_table
*tbl
;
146 tbl
= malloc(MAPI_TABLE_SIZE
);
148 memcpy(tbl
, noop
, MAPI_TABLE_SIZE
);
154 * Destroy a dispatch table.
157 mapi_table_destroy(struct mapi_table
*tbl
)
163 * Fill a dispatch table. The order of the procs is determined when mapi_init
167 mapi_table_fill(struct mapi_table
*tbl
, const mapi_proc
*procs
)
169 const struct mapi_table
*noop
= table_get_noop();
172 for (i
= 0; i
< mapi_num_stubs
; i
++) {
173 const struct mapi_stub
*stub
= mapi_stub_map
[i
];
174 int slot
= stub_get_slot(stub
);
175 mapi_func func
= (mapi_func
) procs
[i
];
178 func
= table_get_func(noop
, slot
);
179 table_set_func(tbl
, slot
, func
);
184 * Make a dispatch table current.
187 mapi_table_make_current(const struct mapi_table
*tbl
)