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/**
* Copyright (C) 2021-2024 Saturneric <[email protected]>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <[email protected]> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#pragma once
#include <cstddef>
#include <queue>
namespace GpgFrontend {
constexpr ssize_t kDataExchangerSize =
static_cast<const ssize_t>(1024 * 1024 * 8); // 8 MB
class GFDataExchanger {
public:
explicit GFDataExchanger(ssize_t size);
auto Write(const std::byte* buffer, size_t size) -> ssize_t;
auto Read(std::byte* buffer, size_t size) -> ssize_t;
void CloseWrite();
private:
std::condition_variable not_full_, not_empty_;
std::queue<std::byte> queue_;
std::mutex mutex_;
const ssize_t queue_max_size_;
std::atomic_bool close_ = false;
};
inline auto CreateStandardGFDataExchanger() -> QSharedPointer<GFDataExchanger> {
return QSharedPointer<GFDataExchanger>::create(kDataExchangerSize);
}
} // namespace GpgFrontend
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