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60 lines
1.8 KiB
Plaintext
60 lines
1.8 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIVisualEventTracerLog;
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/**
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* Interface to control the visual event tracer feature. The result
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* is a log of various events that are monitored by a custom code
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* instrumentation around the mozilla code base.
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*/
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[builtinclass, scriptable, uuid(713ee3ca-95e0-4085-8616-f6d64a9508ad)]
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interface nsIVisualEventTracer : nsISupports
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{
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/**
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* Start the logging now. No affect if already started.
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* Current backlog is deleted by this call otherwise.
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*
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* @param minBacklogSeconds
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* Manimum time to keep the backlog. Entries of the log are discarded
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* when their age is more then value of this argument.
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*/
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void start(in unsigned long minBacklogSeconds);
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/**
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* Stop the logging now. Backlog is kept in memory.
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*/
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void stop();
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/**
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* Obtain the log. This can be called whenever you want.
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*
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* @return
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* Result is an object that keeps snaphot of the log from
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* time this method has been called. You can then access
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* the log using the object. Calling stop() on the tracer
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* doesn't delete this log.
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*/
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nsIVisualEventTracerLog snapshot();
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};
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[builtinclass, scriptable, uuid(8ec6e36d-6cba-400b-bcd6-454679f5f75a)]
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interface nsIVisualEventTracerLog : nsISupports
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{
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/**
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* JSON string of the log. Use JSON.parse to get it as an object.
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*/
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readonly attribute ACString JSONString;
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/**
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* Write the JSON string returned by JSONString to the log defined by
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* the environment variable MOZ_PROFILING_FILE.
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*/
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void writeToProfilingFile();
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};
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