From c7f5f8508d98d5952d42ed7648c2a8f30a4da156 Mon Sep 17 00:00:00 2001
From: Patrick Scott <phanna@android.com>
Date: Thu, 4 Feb 2010 10:37:17 -0500
Subject: Initial source checkin.

The source files were determined by building net_unittests in chromium's source
tree. Some of the obvious libraries were left out (v8, gmock, gtest).

The Android.mk file has all the sources (minus unittests and tools) that were
used during net_unittests compilation. Nothing builds yet because of STL but
that is the next task. The .cpp files will most likely not compile anyways
because of the LOCAL_CPP_EXTENSION mod. I will have to break this into multiple
projects to get around that limitation.
---
 net/disk_cache/mapped_file_posix.cc | 55 +++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 net/disk_cache/mapped_file_posix.cc

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

diff --git a/net/disk_cache/mapped_file_posix.cc b/net/disk_cache/mapped_file_posix.cc
new file mode 100644
index 00000000..f9a361b7
--- /dev/null
+++ b/net/disk_cache/mapped_file_posix.cc
@@ -0,0 +1,55 @@
+// Copyright (c) 2006-2008 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 "net/disk_cache/mapped_file.h"
+
+#include <errno.h>
+#include <sys/mman.h>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "net/disk_cache/disk_cache.h"
+
+namespace disk_cache {
+
+void* MappedFile::Init(const FilePath& name, size_t size) {
+  DCHECK(!init_);
+  if (init_ || !File::Init(name))
+    return NULL;
+
+  if (!size)
+    size = GetLength();
+
+  buffer_ = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
+                 platform_file(), 0);
+  init_ = true;
+  DCHECK(reinterpret_cast<intptr_t>(buffer_) != -1);
+  if (reinterpret_cast<intptr_t>(buffer_) == -1)
+    buffer_ = 0;
+
+  view_size_ = size;
+  return buffer_;
+}
+
+MappedFile::~MappedFile() {
+  if (!init_)
+    return;
+
+  if (buffer_) {
+    int ret = munmap(buffer_, view_size_);
+    DCHECK(0 == ret);
+  }
+}
+
+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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