1 /* Copyright (C) 2002-2003 Jean-Marc Valin
2 Copyright (C) 2007-2009 Xiph.Org Foundation */
3 /**
4 @file stack_alloc.h
5 @brief Temporary memory allocation on stack
6 */
7 /*
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions
10 are met:
11
12 - Redistributions of source code must retain the above copyright
13 notice, this list of conditions and the following disclaimer.
14
15 - Redistributions in binary form must reproduce the above copyright
16 notice, this list of conditions and the following disclaimer in the
17 documentation and/or other materials provided with the distribution.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
23 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef STACK_ALLOC_H
33 #define STACK_ALLOC_H
34
35 #if (!defined (VAR_ARRAYS) && !defined (USE_ALLOCA) && !defined (NONTHREADSAFE_PSEUDOSTACK))
36 #error "Opus requires one of VAR_ARRAYS, USE_ALLOCA, or NONTHREADSAFE_PSEUDOSTACK be defined to select the temporary allocation mode."
37 #endif
38
39 #ifdef USE_ALLOCA
40 # ifdef WIN32
41 # include <malloc.h>
42 # else
43 # ifdef HAVE_ALLOCA_H
44 # include <alloca.h>
45 # else
46 # include <stdlib.h>
47 # endif
48 # endif
49 #endif
50
51 /**
52 * @def ALIGN(stack, size)
53 *
54 * Aligns the stack to a 'size' boundary
55 *
56 * @param stack Stack
57 * @param size New size boundary
58 */
59
60 /**
61 * @def PUSH(stack, size, type)
62 *
63 * Allocates 'size' elements of type 'type' on the stack
64 *
65 * @param stack Stack
66 * @param size Number of elements
67 * @param type Type of element
68 */
69
70 /**
71 * @def VARDECL(var)
72 *
73 * Declare variable on stack
74 *
75 * @param var Variable to declare
76 */
77
78 /**
79 * @def ALLOC(var, size, type)
80 *
81 * Allocate 'size' elements of 'type' on stack
82 *
83 * @param var Name of variable to allocate
84 * @param size Number of elements
85 * @param type Type of element
86 */
87
88 #if defined(VAR_ARRAYS)
89
90 #define VARDECL(type, var)
91 #define ALLOC(var, size, type) type var[size]
92 #define SAVE_STACK
93 #define RESTORE_STACK
94 #define ALLOC_STACK
95
96 #elif defined(USE_ALLOCA)
97
98 #define VARDECL(type, var) type *var
99
100 # ifdef WIN32
101 # define ALLOC(var, size, type) var = ((type*)_alloca(sizeof(type)*(size)))
102 # else
103 # define ALLOC(var, size, type) var = ((type*)alloca(sizeof(type)*(size)))
104 # endif
105
106 #define SAVE_STACK
107 #define RESTORE_STACK
108 #define ALLOC_STACK
109
110 #else
111
112 #ifdef CELT_C
113 char *global_stack=0;
114 #else
115 extern char *global_stack;
116 #endif /* CELT_C */
117
118 #ifdef ENABLE_VALGRIND
119
120 #include <valgrind/memcheck.h>
121
122 #ifdef CELT_C
123 char *global_stack_top=0;
124 #else
125 extern char *global_stack_top;
126 #endif /* CELT_C */
127
128 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
129 #define PUSH(stack, size, type) (VALGRIND_MAKE_MEM_NOACCESS(stack, global_stack_top-stack),ALIGN((stack),sizeof(type)/sizeof(char)),VALGRIND_MAKE_MEM_UNDEFINED(stack, ((size)*sizeof(type)/sizeof(char))),(stack)+=(2*(size)*sizeof(type)/sizeof(char)),(type*)((stack)-(2*(size)*sizeof(type)/sizeof(char))))
130 #define RESTORE_STACK ((global_stack = _saved_stack),VALGRIND_MAKE_MEM_NOACCESS(global_stack, global_stack_top-global_stack))
131 #define ALLOC_STACK char *_saved_stack; ((global_stack = (global_stack==0) ? ((global_stack_top=opus_alloc_scratch(GLOBAL_STACK_SIZE*2)+(GLOBAL_STACK_SIZE*2))-(GLOBAL_STACK_SIZE*2)) : global_stack),VALGRIND_MAKE_MEM_NOACCESS(global_stack, global_stack_top-global_stack)); _saved_stack = global_stack;
132
133 #else
134
135 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
136 #define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)/sizeof(char)),(stack)+=(size)*(sizeof(type)/sizeof(char)),(type*)((stack)-(size)*(sizeof(type)/sizeof(char))))
137 #define RESTORE_STACK (global_stack = _saved_stack)
138 #define ALLOC_STACK char *_saved_stack; (global_stack = (global_stack==0) ? opus_alloc_scratch(GLOBAL_STACK_SIZE) : global_stack); _saved_stack = global_stack;
139
140 #endif /* ENABLE_VALGRIND */
141
142 #include "os_support.h"
143 #define VARDECL(type, var) type *var
144 #define ALLOC(var, size, type) var = PUSH(global_stack, size, type)
145 #define SAVE_STACK char *_saved_stack = global_stack;
146
147 #endif /* VAR_ARRAYS */
148
149
150 #ifdef ENABLE_VALGRIND
151
152 #include <valgrind/memcheck.h>
153 #define OPUS_CHECK_ARRAY(ptr, len) VALGRIND_CHECK_MEM_IS_DEFINED(ptr, len*sizeof(*ptr))
154 #define OPUS_CHECK_VALUE(value) VALGRIND_CHECK_VALUE_IS_DEFINED(value)
155 #define OPUS_CHECK_ARRAY_COND(ptr, len) VALGRIND_CHECK_MEM_IS_DEFINED(ptr, len*sizeof(*ptr))
156 #define OPUS_CHECK_VALUE_COND(value) VALGRIND_CHECK_VALUE_IS_DEFINED(value)
157 #define OPUS_PRINT_INT(value) do {fprintf(stderr, #value " = %d at %s:%d\n", value, __FILE__, __LINE__);}while(0)
158 #define OPUS_FPRINTF fprintf
159
160 #else
161
_opus_false(void)162 static inline int _opus_false(void) {return 0;}
163 #define OPUS_CHECK_ARRAY(ptr, len) _opus_false()
164 #define OPUS_CHECK_VALUE(value) _opus_false()
165 #define OPUS_PRINT_INT(value) do{}while(0)
166 #define OPUS_FPRINTF (void)
167
168 #endif
169
170
171 #endif /* STACK_ALLOC_H */
172