Repo created

TMessagesProj/jni/voip/webrtc/base/threading/scoped_blocking_call.cc

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+// Copyright 2017 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/threading/scoped_blocking_call.h"
+
+#include "base/lazy_instance.h"
+#include "base/threading/thread_local.h"
+#include "base/threading/thread_restrictions.h"
+#include "base/time/time.h"
+#include "base/trace_event/trace_event.h"
+#include "build/build_config.h"
+
+namespace base {
+
+namespace {
+
+#if DCHECK_IS_ON()
+// Used to verify that the trace events used in the constructor do not result in
+// instantiating a ScopedBlockingCall themselves (which would cause an infinite
+// reentrancy loop).
+LazyInstance<ThreadLocalBoolean>::Leaky tls_construction_in_progress =
+    LAZY_INSTANCE_INITIALIZER;
+#endif
+
+}  // namespace
+
+ScopedBlockingCall::ScopedBlockingCall(const Location& from_here,
+                                       BlockingType blocking_type)
+    : UncheckedScopedBlockingCall(from_here, blocking_type) {
+#if DCHECK_IS_ON()
+  DCHECK(!tls_construction_in_progress.Get().Get());
+  tls_construction_in_progress.Get().Set(true);
+#endif
+
+  internal::AssertBlockingAllowed();
+  TRACE_EVENT_BEGIN2("base", "ScopedBlockingCall", "file_name",
+                     from_here.file_name(), "function_name",
+                     from_here.function_name());
+#if DCHECK_IS_ON()
+  tls_construction_in_progress.Get().Set(false);
+#endif
+}
+
+ScopedBlockingCall::~ScopedBlockingCall() {
+  TRACE_EVENT_END0("base", "ScopedBlockingCall");
+}
+
+namespace internal {
+
+ScopedBlockingCallWithBaseSyncPrimitives::
+    ScopedBlockingCallWithBaseSyncPrimitives(const Location& from_here,
+                                             BlockingType blocking_type)
+    : UncheckedScopedBlockingCall(from_here, blocking_type) {
+#if DCHECK_IS_ON()
+  DCHECK(!tls_construction_in_progress.Get().Get());
+  tls_construction_in_progress.Get().Set(true);
+#endif
+
+  internal::AssertBaseSyncPrimitivesAllowed();
+  TRACE_EVENT_BEGIN2("base", "ScopedBlockingCallWithBaseSyncPrimitives",
+                     "file_name", from_here.file_name(), "function_name",
+                     from_here.function_name());
+
+#if DCHECK_IS_ON()
+  tls_construction_in_progress.Get().Set(false);
+#endif
+}
+
+ScopedBlockingCallWithBaseSyncPrimitives::
+    ~ScopedBlockingCallWithBaseSyncPrimitives() {
+  TRACE_EVENT_END0("base", "ScopedBlockingCallWithBaseSyncPrimitives");
+}
+
+}  // namespace internal
+
+}  // namespace base