mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-14 07:56:45 +00:00
146 lines
4 KiB
C++
146 lines
4 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
#include "dmnt2_htcs_receive_buffer.hpp"
|
|
|
|
namespace ams::dmnt {
|
|
|
|
ssize_t HtcsReceiveBuffer::Read(void *dst, size_t size) {
|
|
/* Acquire exclusive access to ourselves. */
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
/* Check that we're readable and valid. */
|
|
if (!(this->IsValid() && this->IsReadable())) {
|
|
return -1;
|
|
}
|
|
|
|
/* Check that we have data to read. */
|
|
const size_t readable = std::min(size, m_readable_size);
|
|
if (readable <= 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* Copy the data. */
|
|
std::memcpy(dst, m_buffer + m_offset, readable);
|
|
|
|
/* Advance our pointers. */
|
|
m_readable_size -= readable;
|
|
m_offset += readable;
|
|
|
|
/* Handle the case where we're done consuming. */
|
|
if (m_readable_size == 0) {
|
|
m_offset = 0;
|
|
m_readable_event.Clear();
|
|
m_writable_event.Signal();
|
|
}
|
|
|
|
return readable;
|
|
}
|
|
|
|
ssize_t HtcsReceiveBuffer::Write(const void *src, size_t size) {
|
|
/* Acquire exclusive access to ourselves. */
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
/* Check that we're readable and valid. */
|
|
if (!(this->IsValid() && this->IsWritable())) {
|
|
return -1;
|
|
}
|
|
|
|
/* Copy the data to our buffer. */
|
|
std::memcpy(m_buffer, src, size);
|
|
|
|
/* Set our fields. */
|
|
m_readable_size = size;
|
|
m_offset = 0;
|
|
m_writable_event.Clear();
|
|
m_readable_event.Signal();
|
|
|
|
return size;
|
|
}
|
|
|
|
bool HtcsReceiveBuffer::WaitToBeReadable() {
|
|
/* Check if we're already readable. */
|
|
{
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
if (this->IsReadable()) {
|
|
return true;
|
|
} else if (!this->IsValid()) {
|
|
return false;
|
|
} else {
|
|
m_readable_event.Clear();
|
|
}
|
|
}
|
|
|
|
/* Wait for us to be readable. */
|
|
m_readable_event.Wait();
|
|
|
|
return this->IsValid();
|
|
}
|
|
|
|
bool HtcsReceiveBuffer::WaitToBeReadable(TimeSpan timeout) {
|
|
/* Check if we're already readable. */
|
|
{
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
if (this->IsReadable()) {
|
|
return true;
|
|
} else if (!this->IsValid()) {
|
|
return false;
|
|
} else {
|
|
m_readable_event.Clear();
|
|
}
|
|
}
|
|
|
|
/* Wait for us to be readable. */
|
|
const bool res = m_readable_event.TimedWait(timeout);
|
|
|
|
return res && this->IsValid();
|
|
}
|
|
|
|
bool HtcsReceiveBuffer::WaitToBeWritable() {
|
|
/* Check if we're already writable. */
|
|
{
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
if (this->IsWritable()) {
|
|
return true;
|
|
} else if (!this->IsValid()) {
|
|
return false;
|
|
} else {
|
|
m_writable_event.Clear();
|
|
}
|
|
}
|
|
|
|
/* Wait for us to be writable. */
|
|
m_writable_event.Wait();
|
|
|
|
return this->IsValid();
|
|
}
|
|
|
|
void HtcsReceiveBuffer::Invalidate() {
|
|
/* Acquire exclusive access to ourselves. */
|
|
std::scoped_lock lk(m_mutex);
|
|
|
|
/* Set ourselves as invalid. */
|
|
m_valid = false;
|
|
|
|
/* Signal our events. */
|
|
m_readable_event.Signal();
|
|
m_writable_event.Signal();
|
|
}
|
|
|
|
}
|