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//===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the DeclGroup, DeclGroupRef, and OwningDeclGroup classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclGroup.h"
#include "clang/AST/Decl.h"
#include "clang/AST/ASTContext.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Bitcode/Serialize.h"
#include "llvm/Bitcode/Deserialize.h"
using namespace clang;
DeclGroup* DeclGroup::Create(ASTContext& C, unsigned numdecls, Decl** decls) {
assert (numdecls > 0);
unsigned size = sizeof(DeclGroup) + sizeof(Decl*) * numdecls;
unsigned alignment = llvm::AlignOf<DeclGroup>::Alignment;
void* mem = C.getAllocator().Allocate(size, alignment);
new (mem) DeclGroup(numdecls, decls);
return static_cast<DeclGroup*>(mem);
}
/// Emit - Serialize a DeclGroup to Bitcode.
void DeclGroup::Emit(llvm::Serializer& S) const {
S.EmitInt(NumDecls);
S.BatchEmitOwnedPtrs(NumDecls, &(*this)[0]);
}
/// Read - Deserialize a DeclGroup from Bitcode.
DeclGroup* DeclGroup::Create(llvm::Deserializer& D, ASTContext& C) {
unsigned NumDecls = (unsigned) D.ReadInt();
unsigned size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
unsigned alignment = llvm::AlignOf<DeclGroup>::Alignment;
DeclGroup* DG = (DeclGroup*) C.getAllocator().Allocate(size, alignment);
new (DG) DeclGroup();
DG->NumDecls = NumDecls;
D.BatchReadOwnedPtrs(NumDecls, &(*DG)[0], C);
return DG;
}
DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) : NumDecls(numdecls) {
assert (numdecls > 0);
assert (decls);
memcpy(this+1, decls, numdecls * sizeof(*decls));
}
void DeclGroup::Destroy(ASTContext& C) {
Decl** Decls = (Decl**) (this + 1);
for (unsigned i = 0; i < NumDecls; ++i)
Decls[i]->Destroy(C);
this->~DeclGroup();
C.getAllocator().Deallocate((void*) this);
}
DeclGroupOwningRef::~DeclGroupOwningRef() {
assert (D == 0 && "Destroy method not called.");
}
void DeclGroupOwningRef::Destroy(ASTContext& C) {
if (!D)
return;
if (getKind() == DeclKind)
D->Destroy(C);
else
reinterpret_cast<DeclGroup*>(reinterpret_cast<uintptr_t>(D) &
~Mask)->Destroy(C);
D = 0;
}
void DeclGroupRef::Emit(llvm::Serializer& S) const {
if (getKind() == DeclKind) {
S.EmitBool(false);
S.EmitPtr(D);
}
else {
S.EmitBool(true);
S.EmitPtr(reinterpret_cast<DeclGroup*>(reinterpret_cast<uintptr_t>(D)
& ~Mask));
}
}
DeclGroupRef DeclGroupRef::ReadVal(llvm::Deserializer& D) {
if (D.ReadBool())
return DeclGroupRef(D.ReadPtr<Decl>());
return DeclGroupRef(D.ReadPtr<DeclGroup>());
}
void DeclGroupOwningRef::Emit(llvm::Serializer& S) const {
if (getKind() == DeclKind) {
S.EmitBool(false);
S.EmitOwnedPtr(D);
}
else {
S.EmitBool(true);
S.EmitOwnedPtr(reinterpret_cast<DeclGroup*>(reinterpret_cast<uintptr_t>(D)
& ~Mask));
}
}
DeclGroupOwningRef& DeclGroupOwningRef::Read(llvm::Deserializer& Dezr,
ASTContext& C) {
if (!Dezr.ReadBool())
D = Dezr.ReadOwnedPtr<Decl>(C);
else {
uintptr_t x = reinterpret_cast<uintptr_t>(Dezr.ReadOwnedPtr<DeclGroup>(C));
D = reinterpret_cast<Decl*>(x | DeclGroupKind);
}
return *this;
}
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