Index: sql/mojo/mojo_vfs.h |
diff --git a/sql/mojo/mojo_vfs.h b/sql/mojo/mojo_vfs.h |
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+// Copyright 2015 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. |
+ |
+#ifndef SQL_MOJO_MOJO_VFS_H_ |
+#define SQL_MOJO_MOJO_VFS_H_ |
+ |
+#include "base/macros.h" |
+#include "components/filesystem/public/interfaces/directory.mojom.h" |
+ |
+typedef struct sqlite3_vfs sqlite3_vfs; |
+ |
+namespace sql { |
+ |
+// Changes the default sqlite3 vfs to a vfs that uses proxies calls to the |
+// mojo:filesystem service. Instantiating this object transparently changes how |
+// the entire //sql/ subsystem works in the process of the caller; all paths |
+// are treated as relative to |directory|. |
+class ScopedMojoFilesystemVFS { |
+ public: |
+ explicit ScopedMojoFilesystemVFS(filesystem::DirectoryPtr directory); |
+ ~ScopedMojoFilesystemVFS(); |
+ |
+ // Returns the directory of the current VFS. |
+ filesystem::DirectoryPtr& GetDirectory(); |
+ |
+ private: |
+ friend sqlite3_vfs* GetParentVFS(sqlite3_vfs* mojo_vfs); |
+ friend filesystem::DirectoryPtr& GetRootDirectory(sqlite3_vfs* mojo_vfs); |
+ |
+ // The default vfs at the time MojoVFS was installed. We use the to pass |
+ // through things like randomness requests and per-platform sleep calls. |
+ sqlite3_vfs* parent_; |
+ |
+ // When we initialize the subsystem, we are given a filesystem::Directory |
+ // object, which is the root directory of a mojo:filesystem. All access to |
+ // various files are specified from this root directory. |
+ filesystem::DirectoryPtr root_directory_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ScopedMojoFilesystemVFS); |
+}; |
+ |
+} // namespace sql |
+ |
+#endif // SQL_MOJO_MOJO_VFS_H_ |