1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef __UTILS_H__ 18 #define __UTILS_H__ 19 20 #include <stdint.h> 21 #include <unistd.h> 22 23 #include <utils/String8.h> 24 #include <utils/threads.h> 25 #include <utils/Timers.h> 26 27 namespace android { 28 29 class Timeout { 30 public: 31 Timeout() : mSystemEndTime(0) { } 32 33 // Set a timeout which should occur msec milliseconds from now. 34 // Negative values will cancel any current timeout; 35 void setTimeout(int msec); 36 37 // Return the number of milliseconds until the timeout occurs, or -1 if 38 // no timeout is scheduled. 39 int msecTillTimeout(nsecs_t nowTime); 40 int msecTillTimeout() { return msecTillTimeout(systemTime()); } 41 42 private: 43 // The systemTime() at which the timeout will be complete, or 0 if no 44 // timeout is currently scheduled. 45 nsecs_t mSystemEndTime; 46 }; 47 48 class LogRing { 49 public: 50 LogRing(const char* header, size_t entries); 51 ~LogRing(); 52 53 // Send a log message to logcat as well as storing it in the ring buffer. 54 void log(int prio, const char* tag, const char* fmt, ...); 55 56 // Add a log message the ring buffer, do not send the message to logcat. 57 void log(const char* fmt, ...); 58 59 // Dump the log to an fd (dumpsys style) 60 void dumpLog(int fd); 61 62 private: 63 class Entry { 64 public: 65 uint32_t count; 66 struct timeval first_ts; 67 struct timeval last_ts; 68 String8 s; 69 }; 70 71 Mutex mLock; 72 Entry* mRingBuffer; 73 size_t mSize; 74 size_t mWr; 75 bool mIsFull; 76 const char* mHeader; 77 78 void internalLog(int prio, const char* tag, const char* fmt, va_list va); 79 }; 80 81 } // namespace android 82 83 #endif // __UTILS_H__ 84
