87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*
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* Copyright (C) 2012-2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include "FlushCommand.h"
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#include "LogBufferElement.h"
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#include "LogCommand.h"
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#include "LogReader.h"
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#include "LogTimes.h"
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FlushCommand::FlushCommand(LogReader &reader,
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bool nonBlock,
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unsigned long tail,
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unsigned int logMask,
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pid_t pid,
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log_time start)
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: mReader(reader)
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, mNonBlock(nonBlock)
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, mTail(tail)
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, mLogMask(logMask)
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, mPid(pid)
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, mStart(start)
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{ }
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// runSocketCommand is called once for every open client on the
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// log reader socket. Here we manage and associated the reader
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// client tracking and log region locks LastLogTimes list of
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// LogTimeEntrys, and spawn a transitory per-client thread to
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// work at filing data to the socket.
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//
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// global LogTimeEntry::lock() is used to protect access,
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// reference counts are used to ensure that individual
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// LogTimeEntry lifetime is managed when not protected.
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void FlushCommand::runSocketCommand(SocketClient *client) {
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LogTimeEntry *entry = NULL;
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LastLogTimes × = mReader.logbuf().mTimes;
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LogTimeEntry::lock();
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LastLogTimes::iterator it = times.begin();
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while(it != times.end()) {
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entry = (*it);
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if (entry->mClient == client) {
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entry->triggerReader_Locked();
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if (entry->runningReader_Locked()) {
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LogTimeEntry::unlock();
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return;
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}
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entry->incRef_Locked();
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break;
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}
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it++;
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}
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if (it == times.end()) {
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// Create LogTimeEntry in notifyNewLog() ?
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if (mTail == (unsigned long) -1) {
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LogTimeEntry::unlock();
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return;
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}
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entry = new LogTimeEntry(mReader, client, mNonBlock, mTail, mLogMask, mPid, mStart);
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times.push_back(entry);
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}
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client->incRef();
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// release client and entry reference counts once done
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entry->startReader_Locked();
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LogTimeEntry::unlock();
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}
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bool FlushCommand::hasReadLogs(SocketClient *client) {
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return clientHasLogCredentials(client);
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}
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