skia2/include/core/SkTScopedPtr.h
epoger@google.com ec3ed6a5eb Automatic update of all copyright notices to reflect new license terms.
I have manually examined all of these diffs and restored a few files that
seem to require manual adjustment.

The following files still need to be modified manually, in a separate CL:

android_sample/SampleApp/AndroidManifest.xml
android_sample/SampleApp/res/layout/layout.xml
android_sample/SampleApp/res/menu/sample.xml
android_sample/SampleApp/res/values/strings.xml
android_sample/SampleApp/src/com/skia/sampleapp/SampleApp.java
android_sample/SampleApp/src/com/skia/sampleapp/SampleView.java
experimental/CiCarbonSampleMain.c
experimental/CocoaDebugger/main.m
experimental/FileReaderApp/main.m
experimental/SimpleCocoaApp/main.m
experimental/iOSSampleApp/Shared/SkAlertPrompt.h
experimental/iOSSampleApp/Shared/SkAlertPrompt.m
experimental/iOSSampleApp/SkiOSSampleApp-Base.xcconfig
experimental/iOSSampleApp/SkiOSSampleApp-Debug.xcconfig
experimental/iOSSampleApp/SkiOSSampleApp-Release.xcconfig
gpu/src/android/GrGLDefaultInterface_android.cpp
gyp/common.gypi
gyp_skia
include/ports/SkHarfBuzzFont.h
include/views/SkOSWindow_wxwidgets.h
make.bat
make.py
src/opts/memset.arm.S
src/opts/memset16_neon.S
src/opts/memset32_neon.S
src/opts/opts_check_arm.cpp
src/ports/SkDebug_brew.cpp
src/ports/SkMemory_brew.cpp
src/ports/SkOSFile_brew.cpp
src/ports/SkXMLParser_empty.cpp
src/utils/ios/SkImageDecoder_iOS.mm
src/utils/ios/SkOSFile_iOS.mm
src/utils/ios/SkStream_NSData.mm
tests/FillPathTest.cpp
Review URL: http://codereview.appspot.com/4816058

git-svn-id: http://skia.googlecode.com/svn/trunk@1982 2bbb7eff-a529-9590-31e7-b0007b416f81
2011-07-28 14:26:00 +00:00

77 lines
2.2 KiB
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkTScopedPtr_DEFINED
#define SkTScopedPtr_DEFINED
#include "SkTypes.h"
/** \class SkTScopedPtr
A SkTScopedPtr<T> is like a T*, except that the destructor of SkTScopedPtr<T>
automatically deletes the pointer it holds (if any). That is, SkTScopedPtr<T>
owns the T object that it points to. Like a T*, a SkTScopedPtr<T> may hold
either NULL or a pointer to a T object. Also like T*, SkTScopedPtr<T> is
thread-compatible, and once you dereference it, you get the threadsafety
guarantees of T.
The size of a SkTScopedPtr is small: sizeof(SkTScopedPtr<T>) == sizeof(T*)
*/
template <typename T> class SkTScopedPtr : SkNoncopyable {
public:
explicit SkTScopedPtr(T* o = NULL) : fObj(o) {}
~SkTScopedPtr() {
enum { kTypeMustBeComplete = sizeof(T) };
delete fObj;
}
/** Delete the current object, if any. Then take ownership of the
passed object.
*/
void reset(T* o = NULL) {
if (o != fObj) {
enum { kTypeMustBeComplete = sizeof(T) };
delete fObj;
fObj = o;
}
}
/** Without deleting the current object, return it and forget about it.
Similar to calling get() and reset(), but the object is not deleted.
*/
T* release() {
T* retVal = fObj;
fObj = NULL;
return retVal;
}
T& operator*() const {
SkASSERT(fObj != NULL);
return *fObj;
}
T* operator->() const {
SkASSERT(fObj != NULL);
return fObj;
}
T* get() const { return fObj; }
bool operator==(T* o) const { return fObj == o; }
bool operator!=(T* o) const { return fObj != o; }
private:
T* fObj;
// Forbid comparison of SkTScopedPtr types. If T2 != T, it doesn't make
// sense, and if T2 == T, it still doesn't make sense because the same
// object can't be owned by two different scoped_ptrs.
template <class T2> bool operator==(SkTScopedPtr<T2> const& o2) const;
template <class T2> bool operator!=(SkTScopedPtr<T2> const& o2) const;
};
#endif