b75cce0389
If a timeout is specified for the reader, then go to sleep with the socket open. If the start time is about to get pruned in the specified log buffers, then wakeup and dump the logs; or wakeup on timeout, whichever comes first. Bug: 25929746 Change-Id: I7d2421c2c5083b33747b84f74d9a560d3ba645df
94 lines
3 KiB
C++
94 lines
3 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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uint64_t start,
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uint64_t timeout) :
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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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mTimeout(timeout) {
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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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if (entry->mTimeout.tv_sec || entry->mTimeout.tv_nsec) {
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LogTimeEntry::unlock();
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return;
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}
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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,
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mPid, mStart, mTimeout);
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times.push_front(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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