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

5 files changed, 104 insertions, 50 deletions

diff --git a/base/base.gyp b/base/base.gyp
index e7eda09..5ba7d4b 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -297,7 +297,10 @@
         'string_util_win.h',
         'sys_info.h',
         'sys_info_chromeos.cc',
+        'sys_info_freebsd.cc',
+        'sys_info_linux.cc',
         'sys_info_mac.cc',
+        'sys_info_openbsd.cc',
         'sys_info_posix.cc',
         'sys_info_win.cc',
         'sys_string_conversions.h',
@@ -465,6 +468,16 @@
             ],
           },
         ],
+        # For now, just test the *BSD platforms enough to exclude them.
+        # Subsequent changes will include them further.
+        [ 'OS != "freebsd"', {
+            'sources/': [ ['exclude', '_freebsd\\.cc$'] ],
+          },
+        ],
+        [ 'OS != "openbsd"', {
+            'sources/': [ ['exclude', '_openbsd\\.cc$'] ],
+          },
+        ],
         [ 'GENERATOR == "quentin"', {
             # Quentin builds don't have a recent enough glibc to include the
             # inotify headers
diff --git a/base/sys_info_freebsd.cc b/base/sys_info_freebsd.cc
new file mode 100644
index 0000000..4d375a7
--- /dev/null
+++ b/base/sys_info_freebsd.cc
@@ -0,0 +1,31 @@
+// 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/logging.h"
+
+namespace base {
+
+int64 SysInfo::AmountOfPhysicalMemory() {
+  int pages, page_size;
+  size_t size = sizeof(pages);
+  sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
+  sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
+  if (pages == -1 || page_size == -1) {
+    NOTREACHED();
+    return 0;
+  }
+  return static_cast<int64>(pages) * page_size;
+}
+
+// static
+size_t SysInfo::MaxSharedMemorySize() {
+  size_t limit;
+  size_t size = sizeof(limit);
+  sysctlbyname("kern.ipc.shmmax", &limit, &size, NULL, 0);
+  return limit;
+}
+
+}  // namespace base
diff --git a/base/sys_info_linux.cc b/base/sys_info_linux.cc
new file mode 100644
index 0000000..67bfe5a6
--- /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
diff --git a/base/sys_info_openbsd.cc b/base/sys_info_openbsd.cc
new file mode 100644
index 0000000..5f85888
--- /dev/null
+++ b/base/sys_info_openbsd.cc
@@ -0,0 +1,22 @@
+// 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/logging.h"
+
+namespace base {
+
+int SysInfo::NumberOfProcessors() {
+  int mib[] = { CTL_HW, HW_NCPU };
+  int ncpu;
+  size_t size = sizeof(ncpu);
+  if (sysctl(mib, 2, &ncpu, &size, NULL, 0) == -1) {
+    NOTREACHED();
+    return 1;
+  }
+  return ncpu;
+}
+
+}  // namespace base
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc
index 34d9df3..af33331 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -26,19 +26,10 @@
 
 namespace base {
 
+#if !defined(OS_OPENBSD)
 int SysInfo::NumberOfProcessors() {
-#if defined(OS_OPENBSD)
-  int mib[] = { CTL_HW, HW_NCPU };
-  int ncpu;
-  size_t size = sizeof(ncpu);
-  if (sysctl(mib, 2, &ncpu, &size, NULL, 0) == -1) {
-    NOTREACHED();
-    return 1;
-  }
-  return ncpu;
-#else
   // It seems that sysconf returns the number of "logical" processors on both
-  // mac and linux.  So we get the number of "online logical" processors.
+  // Mac and Linux.  So we get the number of "online logical" processors.
   long res = sysconf(_SC_NPROCESSORS_ONLN);
   if (res == -1) {
     NOTREACHED();
@@ -46,28 +37,6 @@ int SysInfo::NumberOfProcessors() {
   }
 
   return static_cast<int>(res);
-#endif
-}
-
-#if !defined(OS_MACOSX)
-// static
-int64 SysInfo::AmountOfPhysicalMemory() {
-#if defined(OS_FREEBSD)
-  // _SC_PHYS_PAGES is not part of POSIX and not available on OS X or
-  // FreeBSD
-  // TODO(benl): I have no idea how to get this
-  NOTIMPLEMENTED();
-  return 0;
-#else
-  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;
-#endif
 }
 #endif
 
@@ -156,21 +125,4 @@ size_t SysInfo::VMAllocationGranularity() {
   return getpagesize();
 }
 
-#if defined(OS_LINUX)
-// 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;
-}
-#endif
-
 }  // namespace base