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 37
