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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/sys_info.h" |
| 6 |
| 7 #include "base/file_util.h" |
| 8 #include "base/logging.h" |
| 9 |
| 10 namespace base { |
| 11 |
| 12 int64 SysInfo::AmountOfPhysicalMemory() { |
| 13 long pages = sysconf(_SC_PHYS_PAGES); |
| 14 long page_size = sysconf(_SC_PAGE_SIZE); |
| 15 if (pages == -1 || page_size == -1) { |
| 16 NOTREACHED(); |
| 17 return 0; |
| 18 } |
| 19 |
| 20 return static_cast<int64>(pages) * page_size; |
| 21 } |
| 22 |
| 23 // static |
| 24 size_t SysInfo::MaxSharedMemorySize() { |
| 25 static size_t limit; |
| 26 static bool limit_valid = false; |
| 27 if (!limit_valid) { |
| 28 std::string contents; |
| 29 file_util::ReadFileToString(FilePath("/proc/sys/kernel/shmmax"), &contents); |
| 30 limit = strtoul(contents.c_str(), NULL, 0); |
| 31 limit_valid = true; |
| 32 } |
| 33 return limit; |
| 34 } |
| 35 |
| 36 } // namespace base |
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