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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* -*- c++ -*- */
/*
* Copyright © 2010 Intel Corporation
*
* 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 (including the next
* paragraph) 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.
*/
#include "glsl_symbol_table.h"
class symbol_table_entry {
public:
/* Callers of this talloc-based new need not call delete. It's
* easier to just talloc_free 'ctx' (or any of its ancestors). */
static void* operator new(size_t size, void *ctx)
{
void *entry = talloc_size(ctx, size);
assert(entry != NULL);
return entry;
}
/* If the user *does* call delete, that's OK, we will just
* talloc_free in that case. Here, C++ will have already called the
* destructor so tell talloc not to do that again. */
static void operator delete(void *table)
{
talloc_set_destructor(table, NULL);
talloc_free(table);
}
symbol_table_entry(ir_variable *v) : v(v), f(0), t(0) {}
symbol_table_entry(ir_function *f) : v(0), f(f), t(0) {}
symbol_table_entry(const glsl_type *t, ir_function *f) : v(0), f(f), t(t) {}
ir_variable *v;
ir_function *f;
const glsl_type *t;
};
glsl_symbol_table::glsl_symbol_table()
{
this->language_version = 120;
this->table = _mesa_symbol_table_ctor();
this->mem_ctx = talloc_init("symbol table entries");
}
glsl_symbol_table::~glsl_symbol_table()
{
_mesa_symbol_table_dtor(table);
talloc_free(mem_ctx);
}
void glsl_symbol_table::push_scope()
{
_mesa_symbol_table_push_scope(table);
}
void glsl_symbol_table::pop_scope()
{
_mesa_symbol_table_pop_scope(table);
}
bool glsl_symbol_table::name_declared_this_scope(const char *name)
{
return _mesa_symbol_table_symbol_scope(table, -1, name) == 0;
}
bool glsl_symbol_table::add_variable(const char *name, ir_variable *v)
{
if (this->language_version == 110) {
/* In 1.10, functions and variables have separate namespaces. */
symbol_table_entry *existing = get_entry(name);
if (name_declared_this_scope(name)) {
/* If there's already an existing function (not a constructor!) in
* the current scope, just update the existing entry to include 'v'.
*/
if (existing->v == NULL && existing->t == NULL) {
existing->v = v;
return true;
}
} else {
/* If not declared at this scope, add a new entry. But if an existing
* entry includes a function, propagate that to this block - otherwise
* the new variable declaration would shadow the function.
*/
symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v);
if (existing != NULL)
entry->f = existing->f;
int added = _mesa_symbol_table_add_symbol(table, -1, name, entry);
assert(added == 0);
return true;
}
return false;
}
/* 1.20+ rules: */
symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v);
return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
}
bool glsl_symbol_table::add_type(const char *name, const glsl_type *t,
ir_function *constructor)
{
symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(t, constructor);
return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
}
bool glsl_symbol_table::add_function(const char *name, ir_function *f)
{
if (this->language_version == 110 && name_declared_this_scope(name)) {
/* In 1.10, functions and variables have separate namespaces. */
symbol_table_entry *existing = get_entry(name);
if (existing->f == NULL) {
existing->f = f;
return true;
}
}
symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f);
return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
}
ir_variable *glsl_symbol_table::get_variable(const char *name)
{
symbol_table_entry *entry = get_entry(name);
return entry != NULL ? entry->v : NULL;
}
const glsl_type *glsl_symbol_table::get_type(const char *name)
{
symbol_table_entry *entry = get_entry(name);
return entry != NULL ? entry->t : NULL;
}
ir_function *glsl_symbol_table::get_function(const char *name)
{
symbol_table_entry *entry = get_entry(name);
return entry != NULL ? entry->f : NULL;
}
symbol_table_entry *glsl_symbol_table::get_entry(const char *name)
{
return (symbol_table_entry *)
_mesa_symbol_table_find_symbol(table, -1, name);
}
|
