81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
/*
|
|
PIP - Platform Independent Primitives
|
|
PIIODevice that pass write to read
|
|
Ivan Pelipenko peri4ko@yandex.ru
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "pitransparentdevice.h"
|
|
|
|
|
|
/*! \class PITransparentDevice
|
|
* @brief PIIODevice that pass write to read
|
|
*
|
|
* \section PITransparentDevice_sec0 Synopsis
|
|
* This class pass all data from \a write() function to \a read().
|
|
* %PITransparentDevice contains internal queue and works in
|
|
* packets mode. If you write 3 different packets into this device,
|
|
* read will return this 3 packets.
|
|
*/
|
|
|
|
REGISTER_DEVICE(PITransparentDevice)
|
|
|
|
|
|
PITransparentDevice::PITransparentDevice() {
|
|
}
|
|
|
|
|
|
PITransparentDevice::~PITransparentDevice() {
|
|
stop();
|
|
close();
|
|
}
|
|
|
|
|
|
int PITransparentDevice::readDevice(void * read_to, int max_size) {
|
|
if (!canRead()) return -1;
|
|
que_mutex.lock();
|
|
if (que.isEmpty()) {
|
|
que_mutex.unlock();
|
|
return 0;
|
|
}
|
|
PIByteArray ba = que.dequeue();
|
|
que_mutex.unlock();
|
|
int ret = piMini(max_size, ba.size_s());
|
|
memcpy(read_to, ba.data(), ret);
|
|
return ret;
|
|
}
|
|
|
|
|
|
int PITransparentDevice::writeDevice(const void * data, int max_size) {
|
|
if (!canWrite()) return -1;
|
|
que_mutex.lock();
|
|
que.enqueue(PIByteArray(data, max_size));
|
|
que_mutex.unlock();
|
|
return max_size;
|
|
}
|
|
|
|
|
|
bool PITransparentDevice::openDevice() {
|
|
return true;
|
|
}
|
|
|
|
|
|
bool PITransparentDevice::closeDevice() {
|
|
que_mutex.lock();
|
|
que.clear();
|
|
que_mutex.unlock();
|
|
return true;
|
|
}
|