1589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian/* 2589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Copyright (C) 2010 The Android Open Source Project 3589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 4589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Licensed under the Apache License, Version 2.0 (the "License"); 5589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * you may not use this file except in compliance with the License. 6589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * You may obtain a copy of the License at 7589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 8589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * http://www.apache.org/licenses/LICENSE-2.0 9589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 10589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Unless required by applicable law or agreed to in writing, software 11589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * distributed under the License is distributed on an "AS IS" BASIS, 12589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * See the License for the specific language governing permissions and 14589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * limitations under the License. 15589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian */ 16589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 17589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#ifndef ANDROID_GUI_SENSOR_CHANNEL_H 18589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#define ANDROID_GUI_SENSOR_CHANNEL_H 19589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 20589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <stdint.h> 21589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <sys/types.h> 22589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 23589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/Errors.h> 24589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/RefBase.h> 257b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian#include <cutils/log.h> 26589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 27589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 28589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopiannamespace android { 29589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 30589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianclass Parcel; 31589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 325cae0d0699a169e468fff3e21165f35db12f2cdeMathias Agopianclass BitTube : public RefBase 33589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 34589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianpublic: 35589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 3690ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // creates a BitTube with a default (4KB) send buffer 3790ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian BitTube(); 3890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 3990ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // creates a BitTube with a a specified send and receive buffer size 4090ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian explicit BitTube(size_t bufsize); 4190ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 4290ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian explicit BitTube(const Parcel& data); 435cae0d0699a169e468fff3e21165f35db12f2cdeMathias Agopian virtual ~BitTube(); 44589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 4590ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // check state after construction 465cae0d0699a169e468fff3e21165f35db12f2cdeMathias Agopian status_t initCheck() const; 47589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 4890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // get receive file-descriptor 4990ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian int getFd() const; 50589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 5190ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // send objects (sized blobs). All objects are guaranteed to be written or the call fails. 527b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian template <typename T> 537b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian static ssize_t sendObjects(const sp<BitTube>& tube, 547b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian T const* events, size_t count) { 557b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian return sendObjects(tube, events, count, sizeof(T)); 567b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian } 577b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian 5890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // receive objects (sized blobs). If the receiving buffer isn't large enough, 5990ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // excess messages are silently discarded. 607b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian template <typename T> 617b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian static ssize_t recvObjects(const sp<BitTube>& tube, 627b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian T* events, size_t count) { 637b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian return recvObjects(tube, events, count, sizeof(T)); 647b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian } 657b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian 6690ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // parcels this BitTube 6790ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian status_t writeToParcel(Parcel* reply) const; 6890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 69589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianprivate: 7090ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian void init(size_t rcvbuf, size_t sndbuf); 7190ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 7290ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // send a message. The write is guaranteed to send the whole message or fail. 7390ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian ssize_t write(void const* vaddr, size_t size); 7490ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 7590ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // receive a message. the passed buffer must be at least as large as the 7690ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian // write call used to send the message, excess data is silently discarded. 7790ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian ssize_t read(void* vaddr, size_t size); 7890ed3e8d7883d9c80fb8bf11b1c593bd8b2b39d0Mathias Agopian 79589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian int mSendFd; 80589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian mutable int mReceiveFd; 817b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian 827b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian static ssize_t sendObjects(const sp<BitTube>& tube, 837b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian void const* events, size_t count, size_t objSize); 847b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian 857b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian static ssize_t recvObjects(const sp<BitTube>& tube, 867b5be95cb3903087742f1079fe89cddd8abe3696Mathias Agopian void* events, size_t count, size_t objSize); 87589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian}; 88589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 89589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 90589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian}; // namespace android 91589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 92589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#endif // ANDROID_GUI_SENSOR_CHANNEL_H 93