1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
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 FOUNDATION OR
23 * 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.
36 #include "private/memory.h"
37 #include "FLAC/assert.h"
38 #include "share/alloc.h"
40 void *FLAC__memory_alloc_aligned(size_t bytes, void **aligned_address)
44 FLAC__ASSERT(0 != aligned_address);
46 #ifdef FLAC__ALIGN_MALLOC_DATA
47 /* align on 32-byte (256-bit) boundary */
48 x = safe_malloc_add_2op_(bytes, /*+*/31);
51 /* could do *aligned_address = x + ((unsigned) (32 - (((unsigned)x) & 31))) & 31; */
52 *aligned_address = (void*)(((unsigned)x + 31) & -32);
53 #elif SIZEOF_VOIDP == 8
54 *aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
56 # error Unsupported sizeof(void*)
59 /* there's got to be a better way to do this right for all archs */
60 if(sizeof(void*) == sizeof(unsigned))
61 *aligned_address = (void*)(((unsigned)x + 31) & -32);
62 else if(sizeof(void*) == sizeof(FLAC__uint64))
63 *aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
68 x = safe_malloc_(bytes);
74 FLAC__bool FLAC__memory_alloc_aligned_int32_array(size_t elements, FLAC__int32 **unaligned_pointer, FLAC__int32 **aligned_pointer)
76 FLAC__int32 *pu; /* unaligned pointer */
77 union { /* union needed to comply with C99 pointer aliasing rules */
78 FLAC__int32 *pa; /* aligned pointer */
79 void *pv; /* aligned pointer alias */
82 FLAC__ASSERT(elements > 0);
83 FLAC__ASSERT(0 != unaligned_pointer);
84 FLAC__ASSERT(0 != aligned_pointer);
85 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
87 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
90 pu = FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
95 if(*unaligned_pointer != 0)
96 free(*unaligned_pointer);
97 *unaligned_pointer = pu;
98 *aligned_pointer = u.pa;
103 FLAC__bool FLAC__memory_alloc_aligned_uint32_array(size_t elements, FLAC__uint32 **unaligned_pointer, FLAC__uint32 **aligned_pointer)
105 FLAC__uint32 *pu; /* unaligned pointer */
106 union { /* union needed to comply with C99 pointer aliasing rules */
107 FLAC__uint32 *pa; /* aligned pointer */
108 void *pv; /* aligned pointer alias */
111 FLAC__ASSERT(elements > 0);
112 FLAC__ASSERT(0 != unaligned_pointer);
113 FLAC__ASSERT(0 != aligned_pointer);
114 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
116 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
119 pu = FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
124 if(*unaligned_pointer != 0)
125 free(*unaligned_pointer);
126 *unaligned_pointer = pu;
127 *aligned_pointer = u.pa;
132 FLAC__bool FLAC__memory_alloc_aligned_uint64_array(size_t elements, FLAC__uint64 **unaligned_pointer, FLAC__uint64 **aligned_pointer)
134 FLAC__uint64 *pu; /* unaligned pointer */
135 union { /* union needed to comply with C99 pointer aliasing rules */
136 FLAC__uint64 *pa; /* aligned pointer */
137 void *pv; /* aligned pointer alias */
140 FLAC__ASSERT(elements > 0);
141 FLAC__ASSERT(0 != unaligned_pointer);
142 FLAC__ASSERT(0 != aligned_pointer);
143 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
145 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
148 pu = FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
153 if(*unaligned_pointer != 0)
154 free(*unaligned_pointer);
155 *unaligned_pointer = pu;
156 *aligned_pointer = u.pa;
161 FLAC__bool FLAC__memory_alloc_aligned_unsigned_array(size_t elements, unsigned **unaligned_pointer, unsigned **aligned_pointer)
163 unsigned *pu; /* unaligned pointer */
164 union { /* union needed to comply with C99 pointer aliasing rules */
165 unsigned *pa; /* aligned pointer */
166 void *pv; /* aligned pointer alias */
169 FLAC__ASSERT(elements > 0);
170 FLAC__ASSERT(0 != unaligned_pointer);
171 FLAC__ASSERT(0 != aligned_pointer);
172 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
174 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
177 pu = FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
182 if(*unaligned_pointer != 0)
183 free(*unaligned_pointer);
184 *unaligned_pointer = pu;
185 *aligned_pointer = u.pa;
190 #ifndef FLAC__INTEGER_ONLY_LIBRARY
192 FLAC__bool FLAC__memory_alloc_aligned_real_array(size_t elements, FLAC__real **unaligned_pointer, FLAC__real **aligned_pointer)
194 FLAC__real *pu; /* unaligned pointer */
195 union { /* union needed to comply with C99 pointer aliasing rules */
196 FLAC__real *pa; /* aligned pointer */
197 void *pv; /* aligned pointer alias */
200 FLAC__ASSERT(elements > 0);
201 FLAC__ASSERT(0 != unaligned_pointer);
202 FLAC__ASSERT(0 != aligned_pointer);
203 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
205 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
208 pu = FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
213 if(*unaligned_pointer != 0)
214 free(*unaligned_pointer);
215 *unaligned_pointer = pu;
216 *aligned_pointer = u.pa;
223 void *safe_malloc_mul_2op_(size_t size1, size_t size2)
226 return malloc(1); /* malloc(0) is undefined; FLAC src convention is to always allocate */
227 if(size1 > SIZE_MAX / size2)
229 return malloc(size1*size2);