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Diffstat (limited to 'sysdeps/pthread/aio_suspend.c')
-rw-r--r--sysdeps/pthread/aio_suspend.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/sysdeps/pthread/aio_suspend.c b/sysdeps/pthread/aio_suspend.c
deleted file mode 100644
index c739285c6a..0000000000
--- a/sysdeps/pthread/aio_suspend.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/* Suspend until termination of a requests.
- Copyright (C) 1997-2017 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-
-/* 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 <assert.h>
-#include <errno.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <sys/time.h>
-
-#include <libc-lock.h>
-#include <aio_misc.h>
-
-
-struct clparam
-{
- const struct aiocb *const *list;
- struct waitlist *waitlist;
- struct requestlist **requestlist;
-#ifndef DONT_NEED_AIO_MISC_COND
- pthread_cond_t *cond;
-#endif
- int nent;
-};
-
-
-static void
-cleanup (void *arg)
-{
-#ifdef DONT_NEED_AIO_MISC_COND
- /* Acquire the mutex. If pthread_cond_*wait is used this would
- happen implicitly. */
- pthread_mutex_lock (&__aio_requests_mutex);
-#endif
-
- const struct clparam *param = (const struct clparam *) arg;
-
- /* Now remove the entry in the waiting list for all requests
- which didn't terminate. */
- int cnt = param->nent;
- while (cnt-- > 0)
- if (param->list[cnt] != NULL
- && param->list[cnt]->__error_code == EINPROGRESS)
- {
- struct waitlist **listp;
-
- assert (param->requestlist[cnt] != NULL);
-
- /* There is the chance that we cannot find our entry anymore. This
- could happen if the request terminated and restarted again. */
- listp = &param->requestlist[cnt]->waiting;
- while (*listp != NULL && *listp != &param->waitlist[cnt])
- listp = &(*listp)->next;
-
- if (*listp != NULL)
- *listp = (*listp)->next;
- }
-
-#ifndef DONT_NEED_AIO_MISC_COND
- /* Release the conditional variable. */
- (void) pthread_cond_destroy (param->cond);
-#endif
-
- /* Release the mutex. */
- pthread_mutex_unlock (&__aio_requests_mutex);
-}
-
-#ifdef DONT_NEED_AIO_MISC_COND
-static int
-__attribute__ ((noinline))
-do_aio_misc_wait (unsigned int *cntr, const struct timespec *timeout)
-{
- int result = 0;
-
- AIO_MISC_WAIT (result, *cntr, timeout, 1);
-
- return result;
-}
-#endif
-
-int
-aio_suspend (const struct aiocb *const list[], int nent,
- const struct timespec *timeout)
-{
- if (__glibc_unlikely (nent < 0))
- {
- __set_errno (EINVAL);
- return -1;
- }
-
- struct waitlist waitlist[nent];
- struct requestlist *requestlist[nent];
-#ifndef DONT_NEED_AIO_MISC_COND
- pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
-#endif
- int cnt;
- bool any = false;
- int result = 0;
- unsigned int cntr = 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)
- {
- if (list[cnt]->__error_code == EINPROGRESS)
- {
- requestlist[cnt] = __aio_find_req ((aiocb_union *) list[cnt]);
-
- if (requestlist[cnt] != NULL)
- {
-#ifndef DONT_NEED_AIO_MISC_COND
- waitlist[cnt].cond = &cond;
-#endif
- waitlist[cnt].result = NULL;
- waitlist[cnt].next = requestlist[cnt]->waiting;
- waitlist[cnt].counterp = &cntr;
- waitlist[cnt].sigevp = NULL;
-#ifdef BROKEN_THREAD_SIGNALS
- waitlist[cnt].caller_pid = 0; /* Not needed. */
-#endif
- requestlist[cnt]->waiting = &waitlist[cnt];
- any = true;
- }
- else
- /* We will never suspend. */
- break;
- }
- else
- /* We will never suspend. */
- break;
- }
-
-
- /* Only if none of the entries is NULL or finished to be wait. */
- if (cnt == nent && any)
- {
- struct clparam clparam =
- {
- .list = list,
- .waitlist = waitlist,
- .requestlist = requestlist,
-#ifndef DONT_NEED_AIO_MISC_COND
- .cond = &cond,
-#endif
- .nent = nent
- };
-
- pthread_cleanup_push (cleanup, &clparam);
-
-#ifdef DONT_NEED_AIO_MISC_COND
- result = do_aio_misc_wait (&cntr, timeout);
-#else
- 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);
- }
-#endif
-
- pthread_cleanup_pop (0);
- }
-
- /* Now remove the entry in the waiting list for all requests
- which didn't terminate. */
- while (cnt-- > 0)
- if (list[cnt] != NULL && list[cnt]->__error_code == EINPROGRESS)
- {
- struct waitlist **listp;
-
- assert (requestlist[cnt] != NULL);
-
- /* There is the chance that we cannot find our entry anymore. This
- could happen if the request terminated and restarted again. */
- listp = &requestlist[cnt]->waiting;
- while (*listp != NULL && *listp != &waitlist[cnt])
- listp = &(*listp)->next;
-
- if (*listp != NULL)
- *listp = (*listp)->next;
- }
-
-#ifndef DONT_NEED_AIO_MISC_COND
- /* Release the conditional variable. */
- if (__glibc_unlikely (pthread_cond_destroy (&cond) != 0))
- /* This must never happen. */
- abort ();
-#endif
-
- if (result != 0)
- {
-#ifndef DONT_NEED_AIO_MISC_COND
- /* An error occurred. Possibly it's ETIMEDOUT. 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);
- else
-#endif
- __set_errno (result);
-
- result = -1;
- }
-
- /* Release the mutex. */
- pthread_mutex_unlock (&__aio_requests_mutex);
-
- return result;
-}
-
-weak_alias (aio_suspend, aio_suspend64)
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