1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2010 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* No-op dispatch table.
*
* This file defines a special dispatch table which is loaded with no-op
* functions.
*
* Mesa can register a "no-op handler function" which will be called in
* the event that a no-op function is called.
*
* In the past, the dispatch table was loaded with pointers to a single
* no-op function. But that broke on Windows because the GL entrypoints
* use __stdcall convention. __stdcall means the callee cleans up the
* stack. So one no-op function can't properly clean up the stack. This
* would lead to crashes.
*
* Another benefit of unique no-op functions is we can accurately report
* the function's name in an error message.
*/
#include <stdlib.h>
#include <string.h>
#include "glapi/glapi_priv.h"
void
_glapi_noop_enable_warnings(unsigned char enable)
{
}
void
_glapi_set_warning_func(_glapi_proc func)
{
}
/**
* We'll jump though this function pointer whenever a no-op function
* is called.
*/
static _glapi_nop_handler_proc nop_handler = NULL;
/**
* Register the no-op handler call-back function.
*/
void
_glapi_set_nop_handler(_glapi_nop_handler_proc func)
{
nop_handler = func;
}
/**
* Called by each of the no-op GL entrypoints.
*/
static void
nop(const char *func)
{
if (nop_handler)
nop_handler(func);
}
/**
* This is called if the user somehow calls an unassigned GL dispatch function.
*/
static GLint
NoOpUnused(void)
{
nop("unused GL entry point");
return 0;
}
/*
* Defines for the glapitemp.h functions.
*/
#define KEYWORD1 static
#define KEYWORD1_ALT static
#define KEYWORD2 GLAPIENTRY
#define NAME(func) NoOp##func
#define DISPATCH(func, args, msg) nop(#func);
#define RETURN_DISPATCH(func, args, msg) nop(#func); return 0
/*
* Defines for the table of no-op entry points.
*/
#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name
#define DISPATCH_TABLE_NAME __glapi_noop_table
#define UNUSED_TABLE_NAME __unused_noop_functions
#include "glapitemp.h"
/** Return pointer to new dispatch table filled with no-op functions */
struct _glapi_table *
_glapi_new_nop_table(unsigned num_entries)
{
struct _glapi_table *table = malloc(num_entries * sizeof(_glapi_proc));
if (table) {
memcpy(table, __glapi_noop_table,
num_entries * sizeof(_glapi_proc));
}
return table;
}
|
