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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/ref_counted.h"
#include "base/threading/thread_collision_warner.h"
namespace base {
namespace {
#if DCHECK_IS_ON()
std::atomic_int g_cross_thread_ref_count_access_allow_count(0);
#endif
} // namespace
namespace subtle {
bool RefCountedThreadSafeBase::HasOneRef() const {
return ref_count_.IsOne();
}
#if DCHECK_IS_ON()
RefCountedThreadSafeBase::~RefCountedThreadSafeBase() {
DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without "
"calling Release()";
}
#endif
#if defined(ARCH_CPU_64_BIT)
void RefCountedBase::AddRefImpl() const {
// Check if |ref_count_| overflow only on 64 bit archs since the number of
// objects may exceed 2^32.
// To avoid the binary size bloat, use non-inline function here.
CHECK(++ref_count_ > 0);
}
#endif
#if !defined(ARCH_CPU_X86_FAMILY)
bool RefCountedThreadSafeBase::Release() const {
return ReleaseImpl();
}
void RefCountedThreadSafeBase::AddRef() const {
AddRefImpl();
}
#endif
#if DCHECK_IS_ON()
bool RefCountedBase::CalledOnValidSequence() const {
return sequence_checker_.CalledOnValidSequence() ||
g_cross_thread_ref_count_access_allow_count.load() != 0;
}
#endif
} // namespace subtle
#if DCHECK_IS_ON()
ScopedAllowCrossThreadRefCountAccess::ScopedAllowCrossThreadRefCountAccess() {
++g_cross_thread_ref_count_access_allow_count;
}
ScopedAllowCrossThreadRefCountAccess::~ScopedAllowCrossThreadRefCountAccess() {
--g_cross_thread_ref_count_access_allow_count;
}
#endif
} // namespace base
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