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
28namespace android {
29// ----------------------------------------------------------------------------
30class Parcel;
31
32class BitTube : public RefBase
33{
34public:
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>
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>
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
59private:
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