The Tor Browser / file comparison
comparison: media/mtransport/rlogringbuffer.cpp
media/mtransport/rlogringbuffer.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:a7883e15968e |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=2 et sw=2 tw=80: */ | |
| 3 | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 6 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 /* Original author: bcampen@mozilla.com */ | |
| 9 | |
| 10 #include <cstdarg> | |
| 11 | |
| 12 #include "rlogringbuffer.h" | |
| 13 | |
| 14 #include <deque> | |
| 15 #include <string> | |
| 16 #include "mozilla/Assertions.h" | |
| 17 #include "mozilla/Move.h" // Pinch hitting for <utility> and std::move | |
| 18 #include "mozilla/Mutex.h" | |
| 19 #include "mozilla/NullPtr.h" | |
| 20 #include <vector> | |
| 21 | |
| 22 extern "C" { | |
| 23 #include <csi_platform.h> | |
| 24 #include "r_log.h" | |
| 25 } | |
| 26 | |
| 27 /* Matches r_dest_vlog type defined in r_log.h */ | |
| 28 static int ringbuffer_vlog(int facility, | |
| 29 int level, | |
| 30 const char *format, | |
| 31 va_list ap) { | |
| 32 MOZ_ASSERT(mozilla::RLogRingBuffer::GetInstance()); | |
| 33 // I could be evil and printf right into a std::string, but unless this | |
| 34 // shows up in profiling, it is not worth doing. | |
| 35 char temp[4096]; | |
| 36 vsnprintf(temp, sizeof(temp), format, ap); | |
| 37 | |
| 38 mozilla::RLogRingBuffer::GetInstance()->Log(std::string(temp)); | |
| 39 return 0; | |
| 40 } | |
| 41 | |
| 42 namespace mozilla { | |
| 43 | |
| 44 RLogRingBuffer* RLogRingBuffer::instance; | |
| 45 | |
| 46 RLogRingBuffer::RLogRingBuffer() | |
| 47 : log_limit_(4096), | |
| 48 mutex_("RLogRingBuffer::mutex_") { | |
| 49 } | |
| 50 | |
| 51 RLogRingBuffer::~RLogRingBuffer() { | |
| 52 } | |
| 53 | |
| 54 void RLogRingBuffer::SetLogLimit(uint32_t new_limit) { | |
| 55 OffTheBooksMutexAutoLock lock(mutex_); | |
| 56 log_limit_ = new_limit; | |
| 57 RemoveOld(); | |
| 58 } | |
| 59 | |
| 60 void RLogRingBuffer::Log(std::string&& log) { | |
| 61 OffTheBooksMutexAutoLock lock(mutex_); | |
| 62 log_messages_.push_front(Move(log)); | |
| 63 RemoveOld(); | |
| 64 } | |
| 65 | |
| 66 inline void RLogRingBuffer::RemoveOld() { | |
| 67 if (log_messages_.size() > log_limit_) { | |
| 68 log_messages_.resize(log_limit_); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 | |
| 73 RLogRingBuffer* RLogRingBuffer::CreateInstance() { | |
| 74 if (!instance) { | |
| 75 instance = new RLogRingBuffer; | |
| 76 r_log_set_extra_destination(LOG_INFO, &ringbuffer_vlog); | |
| 77 } | |
| 78 return instance; | |
| 79 } | |
| 80 | |
| 81 RLogRingBuffer* RLogRingBuffer::GetInstance() { | |
| 82 return instance; | |
| 83 } | |
| 84 | |
| 85 void RLogRingBuffer::DestroyInstance() { | |
| 86 // First param is ignored when passing null | |
| 87 r_log_set_extra_destination(LOG_INFO, nullptr); | |
| 88 delete instance; | |
| 89 instance = nullptr; | |
| 90 } | |
| 91 | |
| 92 void RLogRingBuffer::Filter(const std::string& substring, | |
| 93 uint32_t limit, | |
| 94 std::deque<std::string>* matching_logs) { | |
| 95 std::vector<std::string> substrings; | |
| 96 substrings.push_back(substring); | |
| 97 FilterAny(substrings, limit, matching_logs); | |
| 98 } | |
| 99 | |
| 100 inline bool AnySubstringMatches(const std::vector<std::string>& substrings, | |
| 101 const std::string& string) { | |
| 102 for (auto sub = substrings.begin(); sub != substrings.end(); ++sub) { | |
| 103 if (string.find(*sub) != std::string::npos) { | |
| 104 return true; | |
| 105 } | |
| 106 } | |
| 107 return false; | |
| 108 } | |
| 109 | |
| 110 void RLogRingBuffer::FilterAny(const std::vector<std::string>& substrings, | |
| 111 uint32_t limit, | |
| 112 std::deque<std::string>* matching_logs) { | |
| 113 OffTheBooksMutexAutoLock lock(mutex_); | |
| 114 if (limit == 0) { | |
| 115 // At a max, all of the log messages. | |
| 116 limit = log_limit_; | |
| 117 } | |
| 118 | |
| 119 for (auto log = log_messages_.begin(); | |
| 120 log != log_messages_.end() && matching_logs->size() < limit; | |
| 121 ++log) { | |
| 122 if (AnySubstringMatches(substrings, *log)) { | |
| 123 matching_logs->push_front(*log); | |
| 124 } | |
| 125 } | |
| 126 } | |
| 127 | |
| 128 } // namespace mozilla | |
| 129 |
