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/*
* Copyright (C) 2012-2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LOGD_LOG_BUFFER_H__
#define _LOGD_LOG_BUFFER_H__
#include <sys/types.h>
#include <list>
#include <log/log.h>
#include <sysutils/SocketClient.h>
#include <private/android_filesystem_config.h>
#include "LogBufferElement.h"
#include "LogTimes.h"
#include "LogStatistics.h"
#include "LogWhiteBlackList.h"
typedef std::list<LogBufferElement *> LogBufferElementCollection;
class LogBuffer {
LogBufferElementCollection mLogElements;
pthread_mutex_t mLogElementsLock;
LogStatistics stats;
PruneList mPrune;
// watermark of any worst/chatty uid processing
typedef std::unordered_map<uid_t,
LogBufferElementCollection::iterator>
LogBufferIteratorMap;
LogBufferIteratorMap mLastWorstUid[LOG_ID_MAX];
unsigned long mMaxSize[LOG_ID_MAX];
public:
LastLogTimes &mTimes;
LogBuffer(LastLogTimes *times);
void init();
int log(log_id_t log_id, log_time realtime,
uid_t uid, pid_t pid, pid_t tid,
const char *msg, unsigned short len);
uint64_t flushTo(SocketClient *writer, const uint64_t start,
bool privileged,
int (*filter)(const LogBufferElement *element, void *arg) = NULL,
void *arg = NULL);
void clear(log_id_t id, uid_t uid = AID_ROOT);
unsigned long getSize(log_id_t id);
int setSize(log_id_t id, unsigned long size);
unsigned long getSizeUsed(log_id_t id);
// *strp uses malloc, use free to release.
void formatStatistics(char **strp, uid_t uid, unsigned int logMask);
void enableStatistics() {
stats.enableStatistics();
}
int initPrune(char *cp) { return mPrune.init(cp); }
// *strp uses malloc, use free to release.
void formatPrune(char **strp) { mPrune.format(strp); }
// helper must be protected directly or implicitly by lock()/unlock()
char *pidToName(pid_t pid) { return stats.pidToName(pid); }
uid_t pidToUid(pid_t pid) { return stats.pidToUid(pid); }
char *uidToName(uid_t uid) { return stats.uidToName(uid); }
void lock() { pthread_mutex_lock(&mLogElementsLock); }
void unlock() { pthread_mutex_unlock(&mLogElementsLock); }
private:
void maybePrune(log_id_t id);
void prune(log_id_t id, unsigned long pruneRows, uid_t uid = AID_ROOT);
LogBufferElementCollection::iterator erase(
LogBufferElementCollection::iterator it, bool engageStats = true);
};
#endif // _LOGD_LOG_BUFFER_H__
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