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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "services/tracing/public/cpp/tracing_impl.h" | |
| 6 | |
| 7 #include <utility> | |
| 8 | |
| 9 #include "base/lazy_instance.h" | |
| 10 #include "base/synchronization/lock.h" | |
| 11 #include "base/threading/platform_thread.h" | |
| 12 #include "base/trace_event/trace_event_impl.h" | |
| 13 #include "services/shell/public/cpp/connector.h" | |
| 14 | |
| 15 #ifdef NDEBUG | |
| 16 #include "base/command_line.h" | |
| 17 #include "services/tracing/public/cpp/switches.h" | |
| 18 #endif | |
| 19 | |
| 20 namespace mojo { | |
| 21 namespace { | |
| 22 | |
| 23 // Controls access to |g_tracing_singleton_created|, which can be accessed from | |
| 24 // different threads. | |
| 25 base::LazyInstance<base::Lock>::Leaky g_singleton_lock = | |
| 26 LAZY_INSTANCE_INITIALIZER; | |
| 27 | |
| 28 // Whether we are the first TracingImpl to be created in this mojo | |
| 29 // application. The first TracingImpl in a physical mojo application connects | |
| 30 // to the mojo:tracing service. | |
| 31 // | |
| 32 // If this is a ContentHandler, it will outlive all its served Applications. If | |
| 33 // this is a raw mojo application, it is the only Application served. | |
| 34 bool g_tracing_singleton_created = false; | |
| 35 | |
| 36 } | |
| 37 | |
| 38 TracingImpl::TracingImpl() { | |
| 39 } | |
| 40 | |
| 41 TracingImpl::~TracingImpl() { | |
| 42 } | |
| 43 | |
| 44 void TracingImpl::Initialize(shell::Connector* connector, | |
| 45 const std::string& url) { | |
| 46 { | |
| 47 base::AutoLock lock(g_singleton_lock.Get()); | |
| 48 if (g_tracing_singleton_created) | |
| 49 return; | |
| 50 g_tracing_singleton_created = true; | |
| 51 } | |
| 52 | |
| 53 // This will only set the name for the first app in a loaded mojo file. It's | |
| 54 // up to something like CoreServices to name its own child threads. | |
| 55 base::PlatformThread::SetName(url); | |
| 56 | |
| 57 connection_ = connector->Connect("mojo:tracing"); | |
| 58 connection_->AddInterface(this); | |
| 59 | |
| 60 #ifdef NDEBUG | |
| 61 if (base::CommandLine::ForCurrentProcess()->HasSwitch( | |
| 62 tracing::kEarlyTracing)) { | |
| 63 provider_impl_.ForceEnableTracing(); | |
| 64 } | |
| 65 #else | |
| 66 provider_impl_.ForceEnableTracing(); | |
| 67 #endif | |
| 68 } | |
| 69 | |
| 70 void TracingImpl::Create(const shell::Identity& remote_identity, | |
| 71 tracing::TraceProviderRequest request) { | |
| 72 provider_impl_.Bind(std::move(request)); | |
| 73 } | |
| 74 | |
| 75 } // namespace mojo | |
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Chromium Code Reviews
Issue 2208783002:
Make Tracing Service not use outgoing InterfaceProvider, update conventions (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master