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IntrusiveRefCntPtr: in RefCountedBase and RefCountedBaseVPTR, make

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ref_cnt mutable and Retain/Release const to enable reference counted
pointers to const objects

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128804 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Peter Collingbourne 2011-04-04 00:57:03 +00:00
parent eeb7f4ce2d
commit 10fdd5a0f6
1 changed files with 7 additions and 7 deletions
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14
include/llvm/ADT/IntrusiveRefCntPtr.h
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@ -42,15 +42,15 @@ namespace llvm {
//===----------------------------------------------------------------------===//
template <class Derived>
class RefCountedBase {
unsigned ref_cnt;
mutable unsigned ref_cnt;
public:
RefCountedBase() : ref_cnt(0) {}
void Retain() { ++ref_cnt; }
void Release() {
void Retain() const { ++ref_cnt; }
void Release() const {
assert (ref_cnt > 0 && "Reference count is already zero.");
if (--ref_cnt == 0) delete static_cast<Derived*>(this);
if (--ref_cnt == 0) delete static_cast<const Derived*>(this);
}
};
@ -63,14 +63,14 @@ namespace llvm {
/// attempting to do this will produce a compile error.
//===----------------------------------------------------------------------===//
class RefCountedBaseVPTR {
unsigned ref_cnt;
mutable unsigned ref_cnt;
protected:
RefCountedBaseVPTR() : ref_cnt(0) {}
virtual ~RefCountedBaseVPTR() {}
void Retain() { ++ref_cnt; }
void Release() {
void Retain() const { ++ref_cnt; }
void Release() const {
assert (ref_cnt > 0 && "Reference count is already zero.");
if (--ref_cnt == 0) delete this;
}