diff options
Diffstat (limited to 'rt/aio_suspend.c')
| -rw-r--r-- | rt/aio_suspend.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/rt/aio_suspend.c b/rt/aio_suspend.c deleted file mode 100644 index 5ac2d23ffb..0000000000 --- a/rt/aio_suspend.c +++ /dev/null @@ -1,151 +0,0 @@ -/* Suspend until termination of a requests. - Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - - -/* We use an UGLY hack to prevent gcc from finding us cheating. The - implementations of aio_suspend and aio_suspend64 are identical and so - we want to avoid code duplication by using aliases. But gcc sees - the different parameter lists and prints a warning. We define here - a function so that aio_suspend64 has no prototype. */ -#define aio_suspend64 XXX -#include <aio.h> -/* And undo the hack. */ -#undef aio_suspend64 - -#include <errno.h> -#include <stdlib.h> -#include <sys/time.h> - -#include "aio_misc.h" - - -int -aio_suspend (list, nent, timeout) - const struct aiocb *const list[]; - int nent; - const struct timespec *timeout; -{ - struct waitlist waitlist[nent]; - struct requestlist *requestlist[nent]; - pthread_cond_t cond = PTHREAD_COND_INITIALIZER; - int cnt; - int result = 0; - int dummy; - int none = 1; - - /* Request the mutex. */ - pthread_mutex_lock (&__aio_requests_mutex); - - /* There is not yet a finished request. Signal the request that - we are working for it. */ - for (cnt = 0; cnt < nent; ++cnt) - if (list[cnt] != NULL && list[cnt]->__error_code == EINPROGRESS) - { - requestlist[cnt] = __aio_find_req ((aiocb_union *) list[cnt]); - - if (requestlist[cnt] != NULL) - { - waitlist[cnt].cond = &cond; - waitlist[cnt].next = requestlist[cnt]->waiting; - waitlist[cnt].counterp = &dummy; - waitlist[cnt].sigevp = NULL; - waitlist[cnt].caller_pid = 0; /* Not needed. */ - requestlist[cnt]->waiting = &waitlist[cnt]; - none = 0; - } - } - - /* If there is a not finished request wait for it. */ - if (!none) - { - int oldstate; - - /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancelation - points we must be careful. We added entries to the waiting lists - which we must remove. So defer cancelation for now. */ - pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate); - - if (timeout == NULL) - result = pthread_cond_wait (&cond, &__aio_requests_mutex); - else - { - /* We have to convert the relative timeout value into an - absolute time value with pthread_cond_timedwait expects. */ - struct timeval now; - struct timespec abstime; - - __gettimeofday (&now, NULL); - abstime.tv_nsec = timeout->tv_nsec + now.tv_usec * 1000; - abstime.tv_sec = timeout->tv_sec + now.tv_sec; - if (abstime.tv_nsec >= 1000000000) - { - abstime.tv_nsec -= 1000000000; - abstime.tv_sec += 1; - } - - result = pthread_cond_timedwait (&cond, &__aio_requests_mutex, - &abstime); - } - - /* Now remove the entry in the waiting list for all requests - which didn't terminate. */ - for (cnt = 0; cnt < nent; ++cnt) - if (list[cnt] != NULL && list[cnt]->__error_code == EINPROGRESS - && requestlist[cnt] != NULL) - { - struct waitlist **listp = &requestlist[cnt]->waiting; - - /* There is the chance that we cannot find our entry anymore. - This could happen if the request terminated and restarted - again. */ - while (*listp != NULL && *listp != &waitlist[cnt]) - listp = &(*listp)->next; - - if (*listp != NULL) - *listp = (*listp)->next; - } - - /* Now it's time to restore the cancelation state. */ - pthread_setcancelstate (oldstate, NULL); - - /* Release the conditional variable. */ - if (pthread_cond_destroy (&cond) != 0) - /* This must never happen. */ - abort (); - - if (result != 0) - { - /* An error occurred. Possibly it's EINTR. We have to translate - the timeout error report of `pthread_cond_timedwait' to the - form expected from `aio_suspend'. */ - if (result == ETIMEDOUT) - __set_errno (EAGAIN); - - result = -1; - } - } - - /* Release the mutex. */ - pthread_mutex_unlock (&__aio_requests_mutex); - - return result; -} - -weak_alias (aio_suspend, aio_suspend64) |