57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrPendingProgramElement_DEFINED
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#define GrPendingProgramElement_DEFINED
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#include "SkRefCnt.h"
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#include "GrTypes.h"
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/**
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* Helper for owning a pending execution on a GrProgramElement. Using this rather than ref allows
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* resources that are owned by the program element to be correctly tracked as having pending reads
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* and writes rather than refs.
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*/
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template <typename T> class GrPendingProgramElement : SkNoncopyable {
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public:
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GrPendingProgramElement() : fObj(NULL) { };
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// Adds a pending execution on obj.
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explicit GrPendingProgramElement(T* obj) : fObj(obj) {
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if (obj) {
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obj->addPendingExecution();
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}
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}
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void reset(T* obj) {
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if (obj) {
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obj->addPendingExecution();
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}
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if (fObj) {
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fObj->completedExecution();
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}
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fObj = obj;
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}
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T* get() const { return fObj; }
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operator T*() { return fObj; }
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T *operator->() const { return fObj; }
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~GrPendingProgramElement() {
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if (fObj) {
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fObj->completedExecution();
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}
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}
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private:
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T* fObj;
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typedef SkNoncopyable INHERITED;
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};
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#endif
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