From a88d601f7f632a21afe88359d503559fa20d9e40 Mon Sep 17 00:00:00 2001
From: "rvargas@google.com"
 <rvargas@google.com@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Fri, 15 Aug 2008 20:36:21 +0000
Subject: Second pass move the os dependent code apart  on the disk cache.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@960 0039d316-1c4b-4281-b951-d872f2087c98
---
 net/disk_cache/mapped_file_win.cc | 78 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 net/disk_cache/mapped_file_win.cc

(limited to 'net/disk_cache/mapped_file_win.cc')

diff --git a/net/disk_cache/mapped_file_win.cc b/net/disk_cache/mapped_file_win.cc
new file mode 100644
index 0000000..c963063
--- /dev/null
+++ b/net/disk_cache/mapped_file_win.cc
@@ -0,0 +1,78 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "net/disk_cache/mapped_file.h"
+
+#include "net/disk_cache/disk_cache.h"
+
+namespace disk_cache {
+
+void* MappedFile::Init(const std::wstring name, size_t size) {
+  DCHECK(!init_);
+  if (init_ || !File::Init(name))
+    return NULL;
+
+  buffer_ = NULL;
+  init_ = true;
+  section_ = CreateFileMapping(os_file(), NULL, PAGE_READWRITE, 0,
+                               static_cast<DWORD>(size), NULL);
+  if (!section_)
+    return NULL;
+
+  buffer_ = MapViewOfFile(section_, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, size);
+  DCHECK(buffer_);
+  view_size_ = size;
+
+  return buffer_;
+}
+
+MappedFile::~MappedFile() {
+  if (!init_)
+    return;
+
+  if (buffer_) {
+    BOOL ret = UnmapViewOfFile(buffer_);
+    DCHECK(ret);
+  }
+
+  if (section_)
+    CloseHandle(section_);
+}
+
+bool MappedFile::Load(const FileBlock* block) {
+  size_t offset = block->offset() + view_size_;
+  return Read(block->buffer(), block->size(), offset);
+}
+
+bool MappedFile::Store(const FileBlock* block) {
+  size_t offset = block->offset() + view_size_;
+  return Write(block->buffer(), block->size(), offset);
+}
+
+}  // namespace disk_cache
-- 
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