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cas.cc
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cas.cc
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/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2013 Couchbase, Inc.
*
* 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.
*/
#include "couchbase_impl.h"
#include <sstream>
using namespace Couchnode;
/**
* If we have 64 bit pointers we can stuff the pointer into the field and
* save on having to make a new uint64_t*
*/
#if 0 && defined(_LP64) && !defined(COUCHNODE_NO_CASINTPTR)
// Seems to be broken, so disabling this for now..
Handle<Value> Cas::CreateCas(uint64_t cas)
{
Handle<Value> ret = External::New((void*)(uintptr_t)cas);
return ret;
}
bool Cas::GetCas(Handle<Value> obj, uint64_t *p)
{
if (!obj->IsExternal()) {
return false;
}
*p = (uint64_t)(uintptr_t)(obj.As<External>()->Value());
return true;
}
#else
static void casDtor(Persistent<Value> obj, void *p) {
delete (uint64_t*)p;
obj.Dispose();
obj.Clear();
}
#define CAS_ARRAY_MTYPE kExternalUnsignedIntArray
#define CAS_ARRAY_ELEMENTS 2
Handle<Value> Cas::CreateCas(uint64_t cas) {
Persistent<Object> ret = Persistent<Object>::New(Object::New());
uint64_t *p = new uint64_t(cas);
ret->SetIndexedPropertiesToExternalArrayData(p,
CAS_ARRAY_MTYPE,
CAS_ARRAY_ELEMENTS);
ret.MakeWeak(p, casDtor);
return ret;
}
bool Cas::GetCas(Handle<Value> obj, uint64_t *p) {
Handle<Object> realObj = obj.As<Object>();
if (!realObj->IsObject()) {
return false;
}
if (realObj->GetIndexedPropertiesExternalArrayDataLength()
!= CAS_ARRAY_ELEMENTS) {
return false;
}
*p = *(uint64_t*)realObj->GetIndexedPropertiesExternalArrayData();
return true;
}
#endif