/* Copyright (C) 2000 Free Software Foundation, Inc.
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/* Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This file is part of the GNU C Library.
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Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
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Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
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The GNU C Library is free software; you can redistribute it and/or
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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The GNU C Library 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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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <errno.h>
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#include <signal.h>
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#include <signal.h>
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#include <pthread.h>
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#include <pthread.h>
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#include <time.h>
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#include <time.h>
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#include <unistd.h>
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#include <unistd.h>
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#include "posix-timer.h"
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#include "posix-timer.h"
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/* Create new per-process timer using CLOCK. */
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/* Create new per-process timer using CLOCK. */
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int
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int
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timer_create (clock_id, evp, timerid)
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timer_create (clock_id, evp, timerid)
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clockid_t clock_id;
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clockid_t clock_id;
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struct sigevent *evp;
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struct sigevent *evp;
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timer_t *timerid;
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timer_t *timerid;
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{
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{
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int retval = -1;
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int retval = -1;
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struct timer_node *newtimer = NULL;
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struct timer_node *newtimer = NULL;
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struct thread_node *thread = NULL;
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struct thread_node *thread = NULL;
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if (clock_id != CLOCK_REALTIME
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if (clock_id != CLOCK_REALTIME
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#ifdef _POSIX_CPUTIME
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#ifdef _POSIX_CPUTIME
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&& clock_id != CLOCK_PROCESS_CPUTIME_ID
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&& clock_id != CLOCK_PROCESS_CPUTIME_ID
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#endif
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#endif
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#ifdef _POSIX_THREAD_CPUTIME
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#ifdef _POSIX_THREAD_CPUTIME
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&& clock_id != CLOCK_THREAD_CPUTIME_ID
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&& clock_id != CLOCK_THREAD_CPUTIME_ID
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#endif
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#endif
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)
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)
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{
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{
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__set_errno (EINVAL);
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__set_errno (EINVAL);
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return -1;
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return -1;
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}
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}
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pthread_once (&__timer_init_once_control, __timer_init_once);
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pthread_once (&__timer_init_once_control, __timer_init_once);
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if (__timer_init_failed)
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if (__timer_init_failed)
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{
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{
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__set_errno (ENOMEM);
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__set_errno (ENOMEM);
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return -1;
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return -1;
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}
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}
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pthread_mutex_lock (&__timer_mutex);
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pthread_mutex_lock (&__timer_mutex);
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newtimer = __timer_alloc ();
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newtimer = __timer_alloc ();
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if (__builtin_expect (newtimer == NULL, 0))
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if (__builtin_expect (newtimer == NULL, 0))
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{
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{
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__set_errno (EAGAIN);
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__set_errno (EAGAIN);
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goto unlock_bail;
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goto unlock_bail;
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}
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}
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if (evp != NULL)
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if (evp != NULL)
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newtimer->event = *evp;
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newtimer->event = *evp;
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else
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else
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{
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{
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newtimer->event.sigev_notify = SIGEV_SIGNAL;
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newtimer->event.sigev_notify = SIGEV_SIGNAL;
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newtimer->event.sigev_signo = SIGALRM;
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newtimer->event.sigev_signo = SIGALRM;
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newtimer->event.sigev_value.sival_int = timer_ptr2id (newtimer);
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newtimer->event.sigev_value.sival_int = timer_ptr2id (newtimer);
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newtimer->event.sigev_notify_function = 0;
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newtimer->event.sigev_notify_function = 0;
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}
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}
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newtimer->event.sigev_notify_attributes = &newtimer->attr;
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newtimer->event.sigev_notify_attributes = &newtimer->attr;
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newtimer->creator_pid = getpid ();
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newtimer->creator_pid = getpid ();
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switch (__builtin_expect (newtimer->event.sigev_notify, SIGEV_SIGNAL))
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switch (__builtin_expect (newtimer->event.sigev_notify, SIGEV_SIGNAL))
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{
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{
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case SIGEV_NONE:
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case SIGEV_NONE:
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/* This is a strange choice! */
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/* This is a strange choice! */
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break;
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break;
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case SIGEV_SIGNAL:
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case SIGEV_SIGNAL:
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/* We have a global thread for delivering timed signals.
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/* We have a global thread for delivering timed signals.
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If it is not running, try to start it up. */
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If it is not running, try to start it up. */
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switch (clock_id)
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switch (clock_id)
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{
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{
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case CLOCK_REALTIME:
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case CLOCK_REALTIME:
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default:
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default:
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thread = &__timer_signal_thread_rclk;
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thread = &__timer_signal_thread_rclk;
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break;
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break;
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#ifdef _POSIX_CPUTIME
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#ifdef _POSIX_CPUTIME
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case CLOCK_PROCESS_CPUTIME_ID:
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case CLOCK_PROCESS_CPUTIME_ID:
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thread = &__timer_signal_thread_pclk;
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thread = &__timer_signal_thread_pclk;
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break;
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break;
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#endif
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#endif
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#ifdef _POSIX_THREAD_CPUTIME
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#ifdef _POSIX_THREAD_CPUTIME
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case CLOCK_THREAD_CPUTIME_ID:
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case CLOCK_THREAD_CPUTIME_ID:
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thread = &__timer_signal_thread_tclk;
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thread = &__timer_signal_thread_tclk;
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break;
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break;
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#endif
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#endif
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}
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}
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if (! thread->exists)
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if (! thread->exists)
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{
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{
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if (__builtin_expect (__timer_thread_start (thread),
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if (__builtin_expect (__timer_thread_start (thread),
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1) < 0)
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1) < 0)
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{
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{
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__set_errno (EAGAIN);
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__set_errno (EAGAIN);
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goto unlock_bail;
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goto unlock_bail;
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}
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}
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}
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}
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break;
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break;
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case SIGEV_THREAD:
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case SIGEV_THREAD:
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/* Copy over thread attributes or set up default ones. */
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/* Copy over thread attributes or set up default ones. */
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if (evp->sigev_notify_attributes)
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if (evp->sigev_notify_attributes)
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newtimer->attr = *(pthread_attr_t *) evp->sigev_notify_attributes;
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newtimer->attr = *(pthread_attr_t *) evp->sigev_notify_attributes;
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else
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else
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pthread_attr_init (&newtimer->attr);
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pthread_attr_init (&newtimer->attr);
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/* Ensure thread attributes call for deatched thread. */
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/* Ensure thread attributes call for deatched thread. */
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pthread_attr_setdetachstate (&newtimer->attr, PTHREAD_CREATE_DETACHED);
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pthread_attr_setdetachstate (&newtimer->attr, PTHREAD_CREATE_DETACHED);
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/* Try to find existing thread having the right attributes. */
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/* Try to find existing thread having the right attributes. */
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thread = __timer_thread_find_matching (&newtimer->attr, clock_id);
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thread = __timer_thread_find_matching (&newtimer->attr, clock_id);
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/* If no existing thread has these attributes, try to allocate one. */
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/* If no existing thread has these attributes, try to allocate one. */
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if (thread == NULL)
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if (thread == NULL)
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thread = __timer_thread_alloc (&newtimer->attr, clock_id);
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thread = __timer_thread_alloc (&newtimer->attr, clock_id);
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/* Out of luck; no threads are available. */
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/* Out of luck; no threads are available. */
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if (__builtin_expect (thread == NULL, 0))
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if (__builtin_expect (thread == NULL, 0))
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{
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{
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__set_errno (EAGAIN);
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__set_errno (EAGAIN);
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goto unlock_bail;
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goto unlock_bail;
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}
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}
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/* If the thread is not running already, try to start it. */
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/* If the thread is not running already, try to start it. */
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if (! thread->exists
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if (! thread->exists
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&& __builtin_expect (! __timer_thread_start (thread), 0))
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&& __builtin_expect (! __timer_thread_start (thread), 0))
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{
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{
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__set_errno (EAGAIN);
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__set_errno (EAGAIN);
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goto unlock_bail;
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goto unlock_bail;
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}
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}
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break;
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break;
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default:
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default:
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__set_errno (EINVAL);
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__set_errno (EINVAL);
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goto unlock_bail;
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goto unlock_bail;
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}
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}
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newtimer->clock = clock_id;
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newtimer->clock = clock_id;
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newtimer->abstime = 0;
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newtimer->abstime = 0;
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newtimer->armed = 0;
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newtimer->armed = 0;
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newtimer->thread = thread;
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newtimer->thread = thread;
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*timerid = timer_ptr2id (newtimer);
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*timerid = timer_ptr2id (newtimer);
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retval = 0;
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retval = 0;
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if (__builtin_expect (retval, 0) == -1)
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if (__builtin_expect (retval, 0) == -1)
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{
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{
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unlock_bail:
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unlock_bail:
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if (thread != NULL)
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if (thread != NULL)
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__timer_thread_dealloc (thread);
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__timer_thread_dealloc (thread);
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if (newtimer != NULL)
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if (newtimer != NULL)
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__timer_dealloc (newtimer);
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__timer_dealloc (newtimer);
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}
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}
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pthread_mutex_unlock (&__timer_mutex);
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pthread_mutex_unlock (&__timer_mutex);
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return retval;
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return retval;
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}
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}
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