blob: 0a3468601474e877e3eda96ee570f40330d8488d (
plain) (
blame)
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
|
// Copyright 2022 The TCMalloc Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "tcmalloc/internal/page_size.h"
#include <unistd.h>
#include <cstddef>
#include "absl/base/attributes.h"
#include "absl/base/call_once.h"
#include "tcmalloc/internal/config.h"
GOOGLE_MALLOC_SECTION_BEGIN
namespace tcmalloc {
namespace tcmalloc_internal {
size_t GetPageSize() {
ABSL_CONST_INIT static size_t page_size;
ABSL_CONST_INIT static absl::once_flag flag;
absl::base_internal::LowLevelCallOnce(&flag, [&]() {
#if defined(__wasm__) || defined(__asmjs__)
page_size = static_cast<size_t>(getpagesize());
#else
page_size = static_cast<size_t>(sysconf(_SC_PAGESIZE));
#endif
});
return page_size;
}
} // namespace tcmalloc_internal
} // namespace tcmalloc
GOOGLE_MALLOC_SECTION_END
|
