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74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This file defines the interface for event tracing in WebRTC.
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//
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// Event log handlers are set through SetupEventTracer(). User of this API will
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// provide two function pointers to handle event tracing calls.
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//
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// * GetCategoryEnabledPtr
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// Event tracing system calls this function to determine if a particular
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// event category is enabled.
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//
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// * AddTraceEventPtr
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// Adds a tracing event. It is the user's responsibility to log the data
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// provided.
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//
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// Parameters for the above two functions are described in trace_event.h.
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#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_EVENT_TRACER_H_
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#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_EVENT_TRACER_H_
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#include "webrtc/common_types.h"
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namespace webrtc {
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typedef const unsigned char* (*GetCategoryEnabledPtr)(const char* name);
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typedef void (*AddTraceEventPtr)(char phase,
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const unsigned char* category_enabled,
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const char* name,
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unsigned long long id,
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int num_args,
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const char** arg_names,
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const unsigned char* arg_types,
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const unsigned long long* arg_values,
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unsigned char flags);
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// User of WebRTC can call this method to setup event tracing.
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//
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// This method must be called before any WebRTC methods. Functions
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// provided should be thread-safe.
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WEBRTC_DLLEXPORT void SetupEventTracer(
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GetCategoryEnabledPtr get_category_enabled_ptr,
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AddTraceEventPtr add_trace_event_ptr);
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// This class defines interface for the event tracing system to call
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// internally. Do not call these methods directly.
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class EventTracer {
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public:
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static const unsigned char* GetCategoryEnabled(
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const char* name);
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static void AddTraceEvent(
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char phase,
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const unsigned char* category_enabled,
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const char* name,
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unsigned long long id,
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int num_args,
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const char** arg_names,
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const unsigned char* arg_types,
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const unsigned long long* arg_values,
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unsigned char flags);
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};
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} // namespace webrtc
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#endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_EVENT_TRACER_H_
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