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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "services/tracing/public/cpp/provider.h" | 5 #include "services/tracing/public/cpp/provider.h" |
| 6 | 6 |
| 7 #include <utility> | 7 #include <utility> |
| 8 | 8 |
| 9 #include "base/callback.h" | 9 #include "base/callback.h" |
| 10 #include "base/lazy_instance.h" | 10 #include "base/lazy_instance.h" |
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| 22 #include "services/tracing/public/cpp/switches.h" | 22 #include "services/tracing/public/cpp/switches.h" |
| 23 | 23 |
| 24 namespace tracing { | 24 namespace tracing { |
| 25 namespace { | 25 namespace { |
| 26 | 26 |
| 27 // Controls access to |g_tracing_singleton_created|, which can be accessed from | 27 // Controls access to |g_tracing_singleton_created|, which can be accessed from |
| 28 // different threads. | 28 // different threads. |
| 29 base::LazyInstance<base::Lock>::Leaky g_singleton_lock = | 29 base::LazyInstance<base::Lock>::Leaky g_singleton_lock = |
| 30 LAZY_INSTANCE_INITIALIZER; | 30 LAZY_INSTANCE_INITIALIZER; |
| 31 | 31 |
| 32 // Whether we are the first TracingImpl to be created in this mojo | 32 // Whether we are the first TracingImpl to be created in this service. The first |
| 33 // application. The first TracingImpl in a physical mojo application connects | 33 // TracingImpl in a physical service connects to the tracing service. |
| 34 // to the mojo:tracing service. | |
| 35 // | |
| 36 // If this is a ContentHandler, it will outlive all its served Applications. If | |
| 37 // this is a raw mojo application, it is the only Application served. | |
| 38 bool g_tracing_singleton_created = false; | 34 bool g_tracing_singleton_created = false; |
| 39 | 35 |
| 40 } | 36 } |
| 41 | 37 |
| 42 Provider::Provider() | 38 Provider::Provider() |
| 43 : binding_(this), tracing_forced_(false), weak_factory_(this) {} | 39 : binding_(this), tracing_forced_(false), weak_factory_(this) {} |
| 44 | 40 |
| 45 Provider::~Provider() { | 41 Provider::~Provider() { |
| 46 StopTracing(); | 42 StopTracing(); |
| 47 } | 43 } |
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| 141 // events. Empty string is not a valid chunk to record so skip in this case. | 137 // events. Empty string is not a valid chunk to record so skip in this case. |
| 142 if (!events_str->data().empty()) { | 138 if (!events_str->data().empty()) { |
| 143 recorder_->Record(mojo::String(events_str->data())); | 139 recorder_->Record(mojo::String(events_str->data())); |
| 144 } | 140 } |
| 145 if (!has_more_events) { | 141 if (!has_more_events) { |
| 146 recorder_.reset(); | 142 recorder_.reset(); |
| 147 } | 143 } |
| 148 } | 144 } |
| 149 | 145 |
| 150 } // namespace tracing | 146 } // namespace tracing |
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