portapack-mayhem/firmware/common/thread_wait.cpp

/*
 * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * This program 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 2, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "thread_wait.hpp"

int ThreadWait::sleep() {
    chSysLock();
    thread_to_wake = chThdSelf();
    chSchGoSleepS(THD_STATE_SUSPENDED);
    const auto result = chThdSelf()->p_u.rdymsg;
    chSysUnlock();
    return result;
}

bool ThreadWait::wake_from_interrupt(const int value) {
    if (thread_to_wake) {
        thread_to_wake->p_u.rdymsg = value;
        chSchReadyI(thread_to_wake);
        thread_to_wake = nullptr;
        return true;
    } else {
        return false;
    }
}