00001 /* 00002 * Copyright 2006 Intel Corporation 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef __LOGSINK_H__ 00018 #define __LOGSINK_H__ 00019 00020 namespace oasys { 00021 00022 //---------------------------------------------------------------------------- 00028 class LogSink { 00029 public: 00030 virtual ~LogSink() {} 00031 00032 virtual void rotate() = 0; 00033 virtual void log(char* str) = 0; 00034 }; 00035 00036 //---------------------------------------------------------------------------- 00040 class ForkSink : public LogSink { 00041 public: 00042 ForkSink(LogSink* a, LogSink* b) 00043 : a_(a), b_(b) {} 00044 00045 void rotate() { 00046 a->rotate(); 00047 b->rotate(); 00048 } 00049 00050 void log(const char* str) { 00051 a->log(str); 00052 b->log(str); 00053 } 00054 }; 00055 00056 //---------------------------------------------------------------------------- 00060 class FileLogSink : public LogSink { 00061 public: 00066 FileLogSink(const char* filename); 00067 ~FileLogSink(); 00068 00069 void rotate(); 00070 void log(const char* str); 00071 00072 private: 00073 char filename_[256]; 00074 int fd_; 00075 }; 00076 00077 //---------------------------------------------------------------------------- 00078 class RingBufferLogSink : public LogSink { 00079 public: 00080 RingBufferLogSink(); 00081 00082 void rotate() {} 00083 void log(char* str); 00084 00085 static const int NUM_BUFFERS = 32; 00086 static const int BUF_LEN = 512; 00087 00088 private: 00089 int cur_buf_; 00090 char* buf_; 00091 char static_buf_[NUM_BUFFERS * BUF_LEN + 16]; 00092 00093 size_t buf(int i) { 00094 return &buf_[i * BUF_LEN]; 00095 } 00096 }; 00097 00098 } // namespace oasys 00099 00100 #endif /* __LOGSINK_H__ */