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/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2012-2016 Symless Ltd.
* Copyright (C) 2012 Nick Bolton
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ipc/IpcLogOutputter.h"
#include "ipc/IpcServer.h"
#include "ipc/IpcMessage.h"
#include "ipc/Ipc.h"
#include "ipc/IpcClientProxy.h"
#include "mt/Thread.h"
#include "arch/Arch.h"
#include "arch/XArch.h"
#include "base/Event.h"
#include "base/EventQueue.h"
#include "base/TMethodEventJob.h"
enum EIpcLogOutputter {
kBufferMaxSize = 1000,
kMaxSendLines = 100,
kBufferRateWriteLimit = 1000, // writes per kBufferRateTime
kBufferRateTimeLimit = 1 // seconds
};
IpcLogOutputter::IpcLogOutputter(IpcServer& ipcServer, EIpcClientType clientType, bool useThread) :
m_ipcServer(ipcServer),
m_sending(false),
m_bufferThread(nullptr),
m_running(false),
m_notifyCond(ARCH->newCondVar()),
m_notifyMutex(ARCH->newMutex()),
m_bufferWaiting(false),
m_bufferThreadId(0),
m_bufferMaxSize(kBufferMaxSize),
m_bufferRateWriteLimit(kBufferRateWriteLimit),
m_bufferRateTimeLimit(kBufferRateTimeLimit),
m_bufferWriteCount(0),
m_bufferRateStart(ARCH->time()),
m_clientType(clientType)
{
if (useThread) {
m_bufferThread = new Thread([this](){ buffer_thread(); });
}
}
IpcLogOutputter::~IpcLogOutputter()
{
close();
if (m_bufferThread != nullptr) {
m_bufferThread->cancel();
m_bufferThread->wait();
delete m_bufferThread;
}
ARCH->closeCondVar(m_notifyCond);
ARCH->closeMutex(m_notifyMutex);
}
void
IpcLogOutputter::open(const char* title)
{
}
void
IpcLogOutputter::close()
{
if (m_bufferThread != nullptr) {
std::lock_guard<std::mutex> lock(m_runningMutex);
m_running = false;
notifyBuffer();
m_bufferThread->wait(5);
}
}
void
IpcLogOutputter::show(bool showIfEmpty)
{
}
bool
IpcLogOutputter::write(ELevel, const char* text)
{
// ignore events from the buffer thread (would cause recursion).
if (m_bufferThread != nullptr &&
Thread::getCurrentThread().getID() == m_bufferThreadId) {
return true;
}
appendBuffer(text);
notifyBuffer();
return true;
}
void IpcLogOutputter::appendBuffer(const std::string& text)
{
std::lock_guard<std::mutex> lock(m_bufferMutex);
double elapsed = ARCH->time() - m_bufferRateStart;
if (elapsed < m_bufferRateTimeLimit) {
if (m_bufferWriteCount >= m_bufferRateWriteLimit) {
// discard the log line if we've logged too much.
return;
}
}
else {
m_bufferWriteCount = 0;
m_bufferRateStart = ARCH->time();
}
if (m_buffer.size() >= m_bufferMaxSize) {
// if the queue is exceeds size limit,
// throw away the oldest item
m_buffer.pop_front();
}
m_buffer.push_back(text);
m_bufferWriteCount++;
}
bool
IpcLogOutputter::isRunning()
{
std::lock_guard<std::mutex> lock(m_runningMutex);
return m_running;
}
void IpcLogOutputter::buffer_thread()
{
m_bufferThreadId = m_bufferThread->getID();
m_running = true;
try {
while (isRunning()) {
if (m_buffer.empty() || !m_ipcServer.hasClients(m_clientType)) {
ArchMutexLock lock(m_notifyMutex);
ARCH->waitCondVar(m_notifyCond, m_notifyMutex, -1);
}
sendBuffer();
}
}
catch (XArch& e) {
LOG((CLOG_ERR "ipc log buffer thread error, %s", e.what()));
}
LOG((CLOG_DEBUG "ipc log buffer thread finished"));
}
void
IpcLogOutputter::notifyBuffer()
{
ArchMutexLock lock(m_notifyMutex);
ARCH->broadcastCondVar(m_notifyCond);
}
std::string IpcLogOutputter::getChunk(size_t count)
{
std::lock_guard<std::mutex> lock(m_bufferMutex);
if (m_buffer.size() < count) {
count = m_buffer.size();
}
std::string chunk;
for (size_t i = 0; i < count; i++) {
chunk.append(m_buffer.front());
chunk.append("\n");
m_buffer.pop_front();
}
return chunk;
}
void
IpcLogOutputter::sendBuffer()
{
if (m_buffer.empty() || !m_ipcServer.hasClients(m_clientType)) {
return;
}
IpcLogLineMessage message(getChunk(kMaxSendLines));
m_sending = true;
m_ipcServer.send(message, kIpcClientGui);
m_sending = false;
}
void
IpcLogOutputter::bufferMaxSize(UInt16 bufferMaxSize)
{
m_bufferMaxSize = bufferMaxSize;
}
UInt16
IpcLogOutputter::bufferMaxSize() const
{
return m_bufferMaxSize;
}
void
IpcLogOutputter::bufferRateLimit(UInt16 writeLimit, double timeLimit)
{
m_bufferRateWriteLimit = writeLimit;
m_bufferRateTimeLimit = timeLimit;
}
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