Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 97 insertions, 0 deletions

diff --git a/base/scoped_cftyperef.h b/base/scoped_cftyperef.h
new file mode 100644
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+++ b/base/scoped_cftyperef.h
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+// 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.
+
+#ifndef BASE_SCOPED_CFTYPEREF_H__
+#define BASE_SCOPED_CFTYPEREF_H__
+
+#include <CoreFoundation/CoreFoundation.h>
+
+// scoped_cftyperef<> is patterned after scoped_ptr<>, but maintains ownership
+// of a CoreFoundation object: any object that can be represented as a
+// CFTypeRef.  Style deviations here are solely for compatibility with
+// scoped_ptr<>'s interface, with which everyone is already familiar.
+template<typename CFT>
+class scoped_cftyperef {
+ public:
+  typedef CFT element_type;
+
+  explicit scoped_cftyperef(CFT object = NULL)
+      : object_(object) {
+  }
+
+  ~scoped_cftyperef() {
+    if (object_)
+      CFRelease(object_);
+  }
+
+  void reset(CFT object = NULL) {
+    if (object_ && object_ != object) {
+      CFRelease(object_);
+      object_ = object;
+    }
+  }
+
+  bool operator==(CFT that) const {
+    return object_ == that;
+  }
+
+  bool operator!=(CFT that) const {
+    return object_ != that;
+  }
+
+  operator CFT() const {
+    return object_;
+  }
+
+  CFT get() const {
+    return object_;
+  }
+
+  void swap(scoped_cftyperef& that) {
+    CFT temp = that.object_;
+    that.object_ = object_;
+    object_ = temp;
+  }
+
+  // scoped_cftyperef<>::release() is like scoped_ptr<>::release.  It is NOT
+  // a wrapper for CFRelease().  To force a scoped_cftyperef<> object to call
+  // CFRelease(), use scoped_cftyperef<>::reset().
+  CFT release() {
+    CFT temp = object_;
+    object_ = NULL;
+    return temp;
+  }
+
+ private:
+  CFT object_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(scoped_cftyperef);
+};
+
+#endif  // BASE_SCOPED_CFTYPEREF_H__