jemalloc_wrapper.cpp revision 03eebcb6e8762e668a0d3af6bb303cccb88c5b81 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <sys/param.h>
18#include <unistd.h>
19
20#include "jemalloc.h"
21#include "private/bionic_macros.h"
22
23void* je_pvalloc(size_t bytes) {
24  size_t pagesize = sysconf(_SC_PAGESIZE);
25  size_t size = BIONIC_ALIGN(bytes, pagesize);
26  if (size < bytes) {
27    return NULL;
28  }
29  return je_memalign(pagesize, size);
30}
31
32#ifdef je_memalign
33#undef je_memalign
34#endif
35
36// The man page for memalign says it fails if boundary is not a power of 2,
37// but this is not true. Both glibc and dlmalloc round up to the next power
38// of 2, so we'll do the same.
39void* je_memalign_round_up_boundary(size_t boundary, size_t size) {
40  if (boundary != 0) {
41    if (!powerof2(boundary)) {
42      boundary = BIONIC_ROUND_UP_POWER_OF_2(boundary);
43    }
44  } else {
45    boundary = 1;
46  }
47  return je_memalign(boundary, size);
48}
49