78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
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// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/threading/scoped_blocking_call.h"
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#include "base/lazy_instance.h"
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#include "base/threading/thread_local.h"
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#include "base/threading/thread_restrictions.h"
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#include "base/time/time.h"
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#include "base/trace_event/trace_event.h"
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#include "build/build_config.h"
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namespace base {
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namespace {
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#if DCHECK_IS_ON()
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// Used to verify that the trace events used in the constructor do not result in
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// instantiating a ScopedBlockingCall themselves (which would cause an infinite
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// reentrancy loop).
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LazyInstance<ThreadLocalBoolean>::Leaky tls_construction_in_progress =
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LAZY_INSTANCE_INITIALIZER;
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#endif
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} // namespace
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ScopedBlockingCall::ScopedBlockingCall(const Location& from_here,
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BlockingType blocking_type)
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: UncheckedScopedBlockingCall(from_here, blocking_type) {
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#if DCHECK_IS_ON()
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DCHECK(!tls_construction_in_progress.Get().Get());
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tls_construction_in_progress.Get().Set(true);
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#endif
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internal::AssertBlockingAllowed();
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TRACE_EVENT_BEGIN2("base", "ScopedBlockingCall", "file_name",
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from_here.file_name(), "function_name",
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from_here.function_name());
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#if DCHECK_IS_ON()
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tls_construction_in_progress.Get().Set(false);
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#endif
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}
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ScopedBlockingCall::~ScopedBlockingCall() {
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TRACE_EVENT_END0("base", "ScopedBlockingCall");
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}
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namespace internal {
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ScopedBlockingCallWithBaseSyncPrimitives::
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ScopedBlockingCallWithBaseSyncPrimitives(const Location& from_here,
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BlockingType blocking_type)
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: UncheckedScopedBlockingCall(from_here, blocking_type) {
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#if DCHECK_IS_ON()
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DCHECK(!tls_construction_in_progress.Get().Get());
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tls_construction_in_progress.Get().Set(true);
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#endif
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internal::AssertBaseSyncPrimitivesAllowed();
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TRACE_EVENT_BEGIN2("base", "ScopedBlockingCallWithBaseSyncPrimitives",
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"file_name", from_here.file_name(), "function_name",
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from_here.function_name());
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#if DCHECK_IS_ON()
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tls_construction_in_progress.Get().Set(false);
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#endif
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}
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ScopedBlockingCallWithBaseSyncPrimitives::
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~ScopedBlockingCallWithBaseSyncPrimitives() {
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TRACE_EVENT_END0("base", "ScopedBlockingCallWithBaseSyncPrimitives");
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}
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} // namespace internal
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} // namespace base
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