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/*
* Copyright 2010, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_OBJECT_REF_COUNT_H_ // NOLINT
#define _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_OBJECT_REF_COUNT_H_
#include <list>
#include <stack>
#include "clang/AST/StmtVisitor.h"
#include "slang_rs_export_type.h"
namespace clang {
class Expr;
}
namespace slang {
class RSObjectRefCount : public clang::StmtVisitor<RSObjectRefCount> {
private:
class Scope {
private:
clang::CompoundStmt *mCS; // Associated compound statement ({ ... })
std::list<clang::VarDecl*> mRSO; // Declared RS objects in this scope
// RSSetObjectFD and RSClearObjectFD holds FunctionDecl of rsSetObject()
// and rsClearObject() in the current ASTContext.
static clang::FunctionDecl *RSSetObjectFD[];
static clang::FunctionDecl *RSClearObjectFD[];
public:
explicit Scope(clang::CompoundStmt *CS) : mCS(CS) {
return;
}
inline void addRSObject(clang::VarDecl* VD) {
mRSO.push_back(VD);
return;
}
// Initialize RSSetObjectFD and RSClearObjectFD.
static void GetRSRefCountingFunctions(clang::ASTContext &C);
void InsertLocalVarDestructors();
static clang::Expr *ClearRSObject(clang::VarDecl *VD);
};
std::stack<Scope*> mScopeStack;
bool RSInitFD;
inline Scope *getCurrentScope() {
return mScopeStack.top();
}
// TODO(srhines): Composite types and arrays based on RS object types need
// to be handled for both zero-initialization + clearing.
// Return false if the type of variable declared in VD is not an RS object
// type.
static bool InitializeRSObject(clang::VarDecl *VD);
// Return a zero-initializer expr of the type DT. This processes both
// RS matrix type and RS object type.
static clang::Expr *CreateZeroInitializerForRSSpecificType(
RSExportPrimitiveType::DataType DT,
clang::ASTContext &C,
const clang::SourceLocation &Loc);
public:
RSObjectRefCount()
: RSInitFD(false) {
return;
}
void Init(clang::ASTContext &C) {
if (!RSInitFD) {
Scope::GetRSRefCountingFunctions(C);
RSInitFD = true;
}
return;
}
void VisitStmt(clang::Stmt *S);
void VisitDeclStmt(clang::DeclStmt *DS);
void VisitCompoundStmt(clang::CompoundStmt *CS);
void VisitBinAssign(clang::BinaryOperator *AS);
// We believe that RS objects are never involved in CompoundAssignOperator.
// I.e., rs_allocation foo; foo += bar;
};
} // namespace slang
#endif // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_OBJECT_REF_COUNT_H_ NOLINT
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