1 /* 2 * Copyright (C) 2010 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_GUI_SENSOR_CHANNEL_H 18 #define ANDROID_GUI_SENSOR_CHANNEL_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <utils/Errors.h> 24 #include <utils/RefBase.h> 25 #include <cutils/log.h> 26 27 28 namespace android { 29 // ---------------------------------------------------------------------------- 30 class Parcel; 31 32 class BitTube : public RefBase 33 { 34 public: 35 36 BitTube(); 37 BitTube(const Parcel& data); 38 virtual ~BitTube(); 39 40 status_t initCheck() const; 41 int getFd() const; 42 ssize_t write(void const* vaddr, size_t size); 43 ssize_t read(void* vaddr, size_t size); 44 45 status_t writeToParcel(Parcel* reply) const; 46 47 template <typename T> sendObjects(const sp<BitTube> & tube,T const * events,size_t count)48 static ssize_t sendObjects(const sp<BitTube>& tube, 49 T const* events, size_t count) { 50 return sendObjects(tube, events, count, sizeof(T)); 51 } 52 53 template <typename T> recvObjects(const sp<BitTube> & tube,T * events,size_t count)54 static ssize_t recvObjects(const sp<BitTube>& tube, 55 T* events, size_t count) { 56 return recvObjects(tube, events, count, sizeof(T)); 57 } 58 59 private: 60 int mSendFd; 61 mutable int mReceiveFd; 62 63 static ssize_t sendObjects(const sp<BitTube>& tube, 64 void const* events, size_t count, size_t objSize); 65 66 static ssize_t recvObjects(const sp<BitTube>& tube, 67 void* events, size_t count, size_t objSize); 68 }; 69 70 // ---------------------------------------------------------------------------- 71 }; // namespace android 72 73 #endif // ANDROID_GUI_SENSOR_CHANNEL_H 74