51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2015 Giacomo Tesio <giacomo@tesio.it>
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*
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* Jehanne is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <libc.h>
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int
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awakened(int64_t wakeup)
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{
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/* awake returns the ticks of the scheduled wakeup in negative,
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* thus a wakeup is in the past iff (-awake(0)) >= (-wakeup)
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*
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* NOTE: this is not a macro so that we can change the awake()
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* implementation in the future, without affecting the client code.
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*/
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assert(wakeup < 0);
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return wakeup >= awake(0);
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}
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int
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forgivewkp(int64_t wakeup)
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{
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/* awake returns the ticks of the scheduled wakeup in negative,
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* and is able to remove a wakeup provided such value.
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*
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* forgivewkp() is just a wrapper to hide awake()'s details that
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* could change in the future and make client code easier to
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* read.
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*
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* NOTE: this is not a macro so that we can change the awake()
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* implementation in the future, without affecting the client code.
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*/
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assert(wakeup < 0);
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return awake(wakeup);
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}
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