media/mtransport/rlogringbuffer.cpp@6474c204b198 (annotated)
media/mtransport/rlogringbuffer.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 6 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | /* Original author: bcampen@mozilla.com */ |
| michael@0 | 9 | |
| michael@0 | 10 | #include <cstdarg> |
| michael@0 | 11 | |
| michael@0 | 12 | #include "rlogringbuffer.h" |
| michael@0 | 13 | |
| michael@0 | 14 | #include <deque> |
| michael@0 | 15 | #include <string> |
| michael@0 | 16 | #include "mozilla/Assertions.h" |
| michael@0 | 17 | #include "mozilla/Move.h" // Pinch hitting for <utility> and std::move |
| michael@0 | 18 | #include "mozilla/Mutex.h" |
| michael@0 | 19 | #include "mozilla/NullPtr.h" |
| michael@0 | 20 | #include <vector> |
| michael@0 | 21 | |
| michael@0 | 22 | extern "C" { |
| michael@0 | 23 | #include <csi_platform.h> |
| michael@0 | 24 | #include "r_log.h" |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | /* Matches r_dest_vlog type defined in r_log.h */ |
| michael@0 | 28 | static int ringbuffer_vlog(int facility, |
| michael@0 | 29 | int level, |
| michael@0 | 30 | const char *format, |
| michael@0 | 31 | va_list ap) { |
| michael@0 | 32 | MOZ_ASSERT(mozilla::RLogRingBuffer::GetInstance()); |
| michael@0 | 33 | // I could be evil and printf right into a std::string, but unless this |
| michael@0 | 34 | // shows up in profiling, it is not worth doing. |
| michael@0 | 35 | char temp[4096]; |
| michael@0 | 36 | vsnprintf(temp, sizeof(temp), format, ap); |
| michael@0 | 37 | |
| michael@0 | 38 | mozilla::RLogRingBuffer::GetInstance()->Log(std::string(temp)); |
| michael@0 | 39 | return 0; |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | namespace mozilla { |
| michael@0 | 43 | |
| michael@0 | 44 | RLogRingBuffer* RLogRingBuffer::instance; |
| michael@0 | 45 | |
| michael@0 | 46 | RLogRingBuffer::RLogRingBuffer() |
| michael@0 | 47 | : log_limit_(4096), |
| michael@0 | 48 | mutex_("RLogRingBuffer::mutex_") { |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | RLogRingBuffer::~RLogRingBuffer() { |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | void RLogRingBuffer::SetLogLimit(uint32_t new_limit) { |
| michael@0 | 55 | OffTheBooksMutexAutoLock lock(mutex_); |
| michael@0 | 56 | log_limit_ = new_limit; |
| michael@0 | 57 | RemoveOld(); |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | void RLogRingBuffer::Log(std::string&& log) { |
| michael@0 | 61 | OffTheBooksMutexAutoLock lock(mutex_); |
| michael@0 | 62 | log_messages_.push_front(Move(log)); |
| michael@0 | 63 | RemoveOld(); |
| michael@0 | 64 | } |
| michael@0 | 65 | |
| michael@0 | 66 | inline void RLogRingBuffer::RemoveOld() { |
| michael@0 | 67 | if (log_messages_.size() > log_limit_) { |
| michael@0 | 68 | log_messages_.resize(log_limit_); |
| michael@0 | 69 | } |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | |
| michael@0 | 73 | RLogRingBuffer* RLogRingBuffer::CreateInstance() { |
| michael@0 | 74 | if (!instance) { |
| michael@0 | 75 | instance = new RLogRingBuffer; |
| michael@0 | 76 | r_log_set_extra_destination(LOG_INFO, &ringbuffer_vlog); |
| michael@0 | 77 | } |
| michael@0 | 78 | return instance; |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | RLogRingBuffer* RLogRingBuffer::GetInstance() { |
| michael@0 | 82 | return instance; |
| michael@0 | 83 | } |
| michael@0 | 84 | |
| michael@0 | 85 | void RLogRingBuffer::DestroyInstance() { |
| michael@0 | 86 | // First param is ignored when passing null |
| michael@0 | 87 | r_log_set_extra_destination(LOG_INFO, nullptr); |
| michael@0 | 88 | delete instance; |
| michael@0 | 89 | instance = nullptr; |
| michael@0 | 90 | } |
| michael@0 | 91 | |
| michael@0 | 92 | void RLogRingBuffer::Filter(const std::string& substring, |
| michael@0 | 93 | uint32_t limit, |
| michael@0 | 94 | std::deque<std::string>* matching_logs) { |
| michael@0 | 95 | std::vector<std::string> substrings; |
| michael@0 | 96 | substrings.push_back(substring); |
| michael@0 | 97 | FilterAny(substrings, limit, matching_logs); |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | inline bool AnySubstringMatches(const std::vector<std::string>& substrings, |
| michael@0 | 101 | const std::string& string) { |
| michael@0 | 102 | for (auto sub = substrings.begin(); sub != substrings.end(); ++sub) { |
| michael@0 | 103 | if (string.find(*sub) != std::string::npos) { |
| michael@0 | 104 | return true; |
| michael@0 | 105 | } |
| michael@0 | 106 | } |
| michael@0 | 107 | return false; |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | void RLogRingBuffer::FilterAny(const std::vector<std::string>& substrings, |
| michael@0 | 111 | uint32_t limit, |
| michael@0 | 112 | std::deque<std::string>* matching_logs) { |
| michael@0 | 113 | OffTheBooksMutexAutoLock lock(mutex_); |
| michael@0 | 114 | if (limit == 0) { |
| michael@0 | 115 | // At a max, all of the log messages. |
| michael@0 | 116 | limit = log_limit_; |
| michael@0 | 117 | } |
| michael@0 | 118 | |
| michael@0 | 119 | for (auto log = log_messages_.begin(); |
| michael@0 | 120 | log != log_messages_.end() && matching_logs->size() < limit; |
| michael@0 | 121 | ++log) { |
| michael@0 | 122 | if (AnySubstringMatches(substrings, *log)) { |
| michael@0 | 123 | matching_logs->push_front(*log); |
| michael@0 | 124 | } |
| michael@0 | 125 | } |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | } // namespace mozilla |
| michael@0 | 129 |
