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 #define MAPI_MAX_STUBS (sizeof(struct mapi_table) / sizeof(mapi_func))
40 static const struct mapi_stub
*mapi_stub_map
[MAPI_MAX_STUBS
];
41 static int mapi_num_stubs
;
43 static const struct mapi_stub
*
44 get_stub(const char *name
, const struct mapi_stub
*alias
)
46 const struct mapi_stub
*stub
;
48 stub
= stub_find_public(name
);
50 struct mapi_stub
*dyn
= stub_find_dynamic(name
, 1);
52 stub_fix_dynamic(dyn
, alias
);
61 * Initialize mapi. spec consists of NULL-separated strings. The first string
62 * denotes the version. It is followed by variable numbers of entries. Each
63 * entry can have multiple names. An empty name terminates an entry. An empty
64 * entry terminates the spec. A spec of two entries, Foo and Bar, is as
75 mapi_init(const char *spec
)
77 u_mutex_declare_static(mutex
);
83 /* already initialized */
85 u_mutex_unlock(mutex
);
92 /* parse version string */
95 u_mutex_unlock(mutex
);
101 const struct mapi_stub
*stub
;
103 stub
= get_stub(p
, NULL
);
104 /* out of dynamic entries */
114 mapi_stub_map
[count
++] = stub
;
118 mapi_num_stubs
= count
;
120 u_mutex_unlock(mutex
);
124 * Return the address of an entry. Optionally generate the entry if it does
128 mapi_get_proc_address(const char *name
)
130 const struct mapi_stub
*stub
;
132 stub
= stub_find_public(name
);
134 stub
= stub_find_dynamic(name
, 0);
136 return (stub
) ? (mapi_proc
) stub
->addr
: NULL
;
140 * Create a dispatch table.
143 mapi_table_create(void)
145 const struct mapi_table
*noop
= table_get_noop();
146 struct mapi_table
*tbl
;
148 tbl
= malloc(sizeof(*tbl
));
150 memcpy(tbl
, noop
, sizeof(*tbl
));
156 * Destroy a dispatch table.
159 mapi_table_destroy(struct mapi_table
*tbl
)
165 * Fill a dispatch table. The order of the procs is determined when mapi_init
169 mapi_table_fill(struct mapi_table
*tbl
, const mapi_proc
*procs
)
171 const struct mapi_table
*noop
= table_get_noop();
174 for (i
= 0; i
< mapi_num_stubs
; i
++) {
175 const struct mapi_stub
*stub
= mapi_stub_map
[i
];
176 mapi_func func
= (mapi_func
) procs
[i
];
179 func
= table_get_func(noop
, stub
);
180 table_set_func(tbl
, stub
, func
);
185 * Make a dispatch table current.
188 mapi_table_make_current(const struct mapi_table
*tbl
)