diff options
author | Mathias Agopian <mathias@google.com> | 2017-03-06 15:05:04 -0800 |
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committer | Mathias Agopian <mathias@google.com> | 2017-03-07 11:21:29 -0800 |
commit | 801ea093b0e923a61b832f2adba698a273479880 (patch) | |
tree | 97edcd253848107bdf1d8d0fabb522426943369a /include/private | |
parent | 9257845ae16aa6aceedec627cec2e1fce912947c (diff) | |
download | native-801ea093b0e923a61b832f2adba698a273479880.tar.gz |
split libsensor our of libgui
Test: compile & run
Bug: treble cleanup
Change-Id: I5b2c2a14f7d3b364d25695cf0901c5b08cfb0fc9
Diffstat (limited to 'include/private')
-rw-r--r-- | include/private/gui/BitTube.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/include/private/gui/BitTube.h b/include/private/gui/BitTube.h new file mode 100644 index 0000000000..9d65fad228 --- /dev/null +++ b/include/private/gui/BitTube.h @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_GUI_SENSOR_CHANNEL_H +#define ANDROID_GUI_SENSOR_CHANNEL_H + +#include <stdint.h> +#include <sys/types.h> + +#include <android/log.h> +#include <utils/Errors.h> +#include <utils/RefBase.h> + +namespace android { +// ---------------------------------------------------------------------------- +class Parcel; + +class BitTube : public RefBase +{ +public: + + // creates a BitTube with a default (4KB) send buffer + BitTube(); + + // creates a BitTube with a a specified send and receive buffer size + explicit BitTube(size_t bufsize); + + explicit BitTube(const Parcel& data); + virtual ~BitTube(); + + // check state after construction + status_t initCheck() const; + + // get receive file-descriptor + int getFd() const; + + // get the send file-descriptor. + int getSendFd() const; + + // send objects (sized blobs). All objects are guaranteed to be written or the call fails. + template <typename T> + static ssize_t sendObjects(const sp<BitTube>& tube, + T const* events, size_t count) { + return sendObjects(tube, events, count, sizeof(T)); + } + + // receive objects (sized blobs). If the receiving buffer isn't large enough, + // excess messages are silently discarded. + template <typename T> + static ssize_t recvObjects(const sp<BitTube>& tube, + T* events, size_t count) { + return recvObjects(tube, events, count, sizeof(T)); + } + + // parcels this BitTube + status_t writeToParcel(Parcel* reply) const; + +private: + void init(size_t rcvbuf, size_t sndbuf); + + // send a message. The write is guaranteed to send the whole message or fail. + ssize_t write(void const* vaddr, size_t size); + + // receive a message. the passed buffer must be at least as large as the + // write call used to send the message, excess data is silently discarded. + ssize_t read(void* vaddr, size_t size); + + int mSendFd; + mutable int mReceiveFd; + + static ssize_t sendObjects(const sp<BitTube>& tube, + void const* events, size_t count, size_t objSize); + + static ssize_t recvObjects(const sp<BitTube>& tube, + void* events, size_t count, size_t objSize); +}; + +// ---------------------------------------------------------------------------- +}; // namespace android + +#endif // ANDROID_GUI_SENSOR_CHANNEL_H |