Disk cache: Use platform_file functions for POSIX.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/7824027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99997 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 11 insertions, 6 deletions

diff --git a/net/disk_cache/file_posix.cc b/net/disk_cache/file_posix.cc
index a80ae6c..b767c17 100644
--- a/net/disk_cache/file_posix.cc
+++ b/net/disk_cache/file_posix.cc
@@ -202,19 +202,24 @@ bool File::IsValid() const {
 
 bool File::Read(void* buffer, size_t buffer_len, size_t offset) {
   DCHECK(init_);
-  if (buffer_len > ULONG_MAX || offset > LONG_MAX)
+  if (buffer_len > static_cast<size_t>(kint32max) ||
+      offset > static_cast<size_t>(kint32max))
     return false;
 
-  int ret = pread(platform_file_, buffer, buffer_len, offset);
+  int ret = base::ReadPlatformFile(platform_file_, offset,
+                                   static_cast<char*>(buffer), buffer_len);
   return (static_cast<size_t>(ret) == buffer_len);
 }
 
 bool File::Write(const void* buffer, size_t buffer_len, size_t offset) {
   DCHECK(init_);
-  if (buffer_len > ULONG_MAX || offset > ULONG_MAX)
+  if (buffer_len > static_cast<size_t>(kint32max) ||
+      offset > static_cast<size_t>(kint32max))
     return false;
 
-  int ret = pwrite(platform_file_, buffer, buffer_len, offset);
+  int ret = base::WritePlatformFile(platform_file_, offset,
+                                    static_cast<const char*>(buffer),
+                                    buffer_len);
   return (static_cast<size_t>(ret) == buffer_len);
 }
 
@@ -256,7 +261,7 @@ bool File::SetLength(size_t length) {
   if (length > ULONG_MAX)
     return false;
 
-  return 0 == ftruncate(platform_file_, length);
+  return base::TruncatePlatformFile(platform_file_, length);
 }
 
 size_t File::GetLength() {
@@ -277,7 +282,7 @@ void File::WaitForPendingIO(int* num_pending_io) {
 
 File::~File() {
   if (IsValid())
-    close(platform_file_);
+    base::ClosePlatformFile(platform_file_);
 }
 
 bool File::AsyncWrite(const void* buffer, size_t buffer_len, size_t offset,