1 /* 2 * Copyright (C) 2006 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 ANDROID_HARDWARE_BUFFEREDTEXTOUTPUT_H 18 #define ANDROID_HARDWARE_BUFFEREDTEXTOUTPUT_H 19 20 #include "TextOutput.h" 21 22 #include <utils/threads.h> 23 #include <sys/uio.h> 24 25 // --------------------------------------------------------------------------- 26 namespace android { 27 namespace hardware { 28 29 class BufferedTextOutput : public TextOutput 30 { 31 public: 32 //** Flags for constructor */ 33 enum { 34 MULTITHREADED = 0x0001 35 }; 36 37 explicit BufferedTextOutput(uint32_t flags = 0); 38 virtual ~BufferedTextOutput(); 39 40 virtual status_t print(const char* txt, size_t len); 41 virtual void moveIndent(int delta); 42 43 virtual void pushBundle(); 44 virtual void popBundle(); 45 46 protected: 47 virtual status_t writeLines(const struct iovec& vec, size_t N) = 0; 48 49 private: 50 struct BufferState; 51 struct ThreadState; 52 53 BufferState*getBuffer() const; 54 55 uint32_t mFlags; 56 const int32_t mSeq; 57 const int32_t mIndex; 58 59 Mutex mLock; 60 BufferState* mGlobalState; 61 }; 62 63 // --------------------------------------------------------------------------- 64 } // namespace hardware 65 } // namespace android 66 67 #endif // ANDROID_HARDWARE_BUFFEREDTEXTOUTPUT_H 68