67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* alarm.cpp
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* Sends a signal after a certain amount of time has passed.
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*/
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#include <errno.h>
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#include <timespec.h>
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#include <sortix/itimerspec.h>
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#include <sortix/signal.h>
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#include <sortix/kernel/clock.h>
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#include <sortix/kernel/copy.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/process.h>
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#include <sortix/kernel/syscall.h>
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#include <sortix/kernel/timer.h>
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namespace Sortix {
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static void alarm_handler(Clock* /*clock*/, Timer* /*timer*/, void* user)
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{
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Process* process = (Process*) user;
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ScopedLock lock(&process->user_timers_lock);
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process->DeliverSignal(SIGALRM);
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}
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int sys_alarmns(const struct timespec* user_delay, struct timespec* user_odelay)
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{
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Process* process = CurrentProcess();
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ScopedLock lock(&process->user_timers_lock);
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struct itimerspec delay, odelay;
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if ( !CopyFromUser(&delay.it_value, user_delay, sizeof(*user_delay)) )
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return -1;
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if ( !timespec_is_canonical(delay.it_value) )
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return errno = EINVAL, -1;
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delay.it_interval = timespec_nul();
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int flags = 0;
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if ( !delay.it_value.tv_sec && !delay.it_value.tv_nsec )
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flags |= TIMER_DISARM;
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process->alarm_timer.Set(&delay, &odelay, flags, alarm_handler, process);
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if ( !CopyToUser(user_odelay, &odelay.it_value, sizeof(*user_odelay)) )
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return -1;
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return 0;
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}
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} // namespace Sortix
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