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125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Some of this code is cut-and-pasted from nICEr. Copyright is:
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/*
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Copyright (c) 2007, Adobe Systems, Incorporated
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Adobe Systems, Network Resonance nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Original author: bcampen@mozilla.com */
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/*
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This file defines an r_dest_vlog that can be used to accumulate log messages
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for later inspection/filtering. The intent is to use this for interactive
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debug purposes on an about:webrtc page or similar.
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*/
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#ifndef rlogringbuffer_h__
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#define rlogringbuffer_h__
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#include <stdint.h>
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#include <deque>
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#include <string>
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#include <vector>
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#include "mozilla/Mutex.h"
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#include "m_cpp_utils.h"
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namespace mozilla {
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class RLogRingBuffer {
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public:
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/*
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NB: These are not threadsafe, nor are they safe to call during static
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init/deinit.
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*/
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static RLogRingBuffer* CreateInstance();
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static RLogRingBuffer* GetInstance();
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static void DestroyInstance();
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/*
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Retrieves log statements that match a given substring, subject to a
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limit. |matching_logs| will be filled in chronological order (front()
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is oldest, back() is newest). |limit| == 0 will be interpreted as no
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limit.
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*/
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void Filter(const std::string& substring,
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uint32_t limit,
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std::deque<std::string>* matching_logs);
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void FilterAny(const std::vector<std::string>& substrings,
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uint32_t limit,
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std::deque<std::string>* matching_logs);
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inline void GetAny(uint32_t limit,
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std::deque<std::string>* matching_logs) {
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Filter("", limit, matching_logs);
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}
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void SetLogLimit(uint32_t new_limit);
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void Log(std::string&& log);
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private:
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RLogRingBuffer();
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~RLogRingBuffer();
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void RemoveOld();
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static RLogRingBuffer* instance;
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/*
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* Might be worthwhile making this a circular buffer, but I think it is
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* preferable to take up as little space as possible if no logging is
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* happening/the ringbuffer is not being used.
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*/
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std::deque<std::string> log_messages_;
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/* Max size of log buffer (should we use time-depth instead/also?) */
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uint32_t log_limit_;
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OffTheBooksMutex mutex_;
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DISALLOW_COPY_ASSIGN(RLogRingBuffer);
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}; // class RLogRingBuffer
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} // namespace mozilla
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#endif // rlogringbuffer_h__
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