Implement GetFreeDiskSpace for POSIX and GetSystemMemory for Linux.

Patch by Paweł Hajdan jr <phajdan.jr@gmail.com>

http://codereview.chromium.org/1891


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@2007 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 27 insertions, 3 deletions

diff --git a/net/disk_cache/cache_util_posix.cc b/net/disk_cache/cache_util_posix.cc
index 708f378..041b2b5 100644
--- a/net/disk_cache/cache_util_posix.cc
+++ b/net/disk_cache/cache_util_posix.cc
@@ -4,19 +4,43 @@
 
 #include "net/disk_cache/cache_util.h"
 
+#include <errno.h>
+#include <sys/statvfs.h>
+#include <unistd.h>
+
 #include "base/file_util.h"
 #include "base/logging.h"
+#include "base/string_util.h"
 
 namespace disk_cache {
 
 int64 GetFreeDiskSpace(const std::wstring& path) {
-  DLOG(WARNING) << "Not Implemented";
-  return -1;
+  struct statvfs stats;
+  if (statvfs(WideToUTF8(path).c_str(), &stats) != 0) {
+    return -1;
+  }
+  return static_cast<int64>(stats.f_bavail) * stats.f_frsize;
 }
 
 int64 GetSystemMemory() {
-  // TODO(pinkerton): figure this out for mac/linux
+#if defined(OS_LINUX)
+  // _SC_PHYS_PAGES is not part of POSIX and not available on OS X
+  long pages = sysconf(_SC_PHYS_PAGES);
+  if (pages == -1) {
+    return -1;
+  }
+  long page_size = sysconf(_SC_PAGE_SIZE);
+  if (page_size == -1) {
+    return -1;
+  }
+  int64 result = static_cast<int64>(pages) * page_size;
+  DCHECK(result > 0);
+  return result;
+#else
+  // TODO(pinkerton): figure this out for mac
+  NOTIMPLEMENTED();
   return -1;
+#endif
 }
 
 bool MoveCache(const std::wstring& from_path, const std::wstring& to_path) {