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73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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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namespace Alarm {
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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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static
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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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delay.it_interval = timespec_nul();
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process->alarm_timer.Set(&delay, &odelay, 0, alarm_handler, (void*) 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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void Init()
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{
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Syscall::Register(SYSCALL_ALARMNS, (void*) sys_alarmns);
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}
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} // namespace Alarm
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} // namespace Sortix
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