posix: split OS-specific bits out of sys_info_posix
Split into Linux and BSD-specific files.
Review URL: http://codereview.chromium.org/427010
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@32860 0039d316-1c4b-4281-b951-d872f2087c98
CrOS-Libchrome-Original-Commit: 5f5ac6a852057825cb054642785c2b30ab46f1b2
diff --git a/base/sys_info_linux.cc b/base/sys_info_linux.cc
new file mode 100644
index 0000000..67bfe5a
--- /dev/null
+++ b/base/sys_info_linux.cc
@@ -0,0 +1,36 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/sys_info.h"
+
+#include "base/file_util.h"
+#include "base/logging.h"
+
+namespace base {
+
+int64 SysInfo::AmountOfPhysicalMemory() {
+ long pages = sysconf(_SC_PHYS_PAGES);
+ long page_size = sysconf(_SC_PAGE_SIZE);
+ if (pages == -1 || page_size == -1) {
+ NOTREACHED();
+ return 0;
+ }
+
+ return static_cast<int64>(pages) * page_size;
+}
+
+// static
+size_t SysInfo::MaxSharedMemorySize() {
+ static size_t limit;
+ static bool limit_valid = false;
+ if (!limit_valid) {
+ std::string contents;
+ file_util::ReadFileToString(FilePath("/proc/sys/kernel/shmmax"), &contents);
+ limit = strtoul(contents.c_str(), NULL, 0);
+ limit_valid = true;
+ }
+ return limit;
+}
+
+} // namespace base