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| 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 uint64 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 static_cast<uint64>(limit); | |
| 34 } | |
| 35 | |
| 36 } // namespace base | |
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