1 // Copyright (c) 2011 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 <sys/sysctl.h> 8 9 #include "base/logging.h" 10 11 namespace base { 12 13 int64 SysInfo::AmountOfPhysicalMemory() { 14 int pages, page_size; 15 size_t size = sizeof(pages); 16 sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0); 17 sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0); 18 if (pages == -1 || page_size == -1) { 19 NOTREACHED(); 20 return 0; 21 } 22 return static_cast<int64>(pages) * page_size; 23 } 24 25 // static 26 size_t SysInfo::MaxSharedMemorySize() { 27 size_t limit; 28 size_t size = sizeof(limit); 29 if (sysctlbyname("kern.ipc.shmmax", &limit, &size, NULL, 0) < 0) { 30 NOTREACHED(); 31 return 0; 32 } 33 return limit; 34 } 35 36 } // namespace base 37
