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-rw-r--r--sysdeps/pthread/lio_listio64.c169
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diff --git a/sysdeps/pthread/lio_listio64.c b/sysdeps/pthread/lio_listio64.c
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+/* Enqueue and list of read or write requests, 64bit offset version.
+ Copyright (C) 1997, 1998, 1999 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. */
+
+#include <aio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "aio_misc.h"
+
+
+/* We need this special structure to handle asynchronous I/O. */
+struct async_waitlist
+ {
+ int counter;
+ struct sigevent sigev;
+ struct waitlist list[0];
+ };
+
+
+int
+lio_listio64 (mode, list, nent, sig)
+ int mode;
+ struct aiocb64 *const list[];
+ int nent;
+ struct sigevent *sig;
+{
+ struct requestlist *requests[nent];
+ int cnt;
+ volatile int total = 0;
+ int result = 0;
+
+ /* Check arguments. */
+ if (mode != LIO_WAIT && mode != LIO_NOWAIT)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* Request the mutex. */
+ pthread_mutex_lock (&__aio_requests_mutex);
+
+ /* Now we can enqueue all requests. Since we already acquired the
+ mutex the enqueue function need not do this. */
+ for (cnt = 0; cnt < nent; ++cnt)
+ if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
+ {
+ requests[cnt] = __aio_enqueue_request ((aiocb_union *) list[cnt],
+ (list[cnt]->aio_lio_opcode
+ | 128));
+ if (requests[cnt] != NULL)
+ /* Successfully enqueued. */
+ ++total;
+ else
+ /* Signal that we've seen an error. `errno' and the error code
+ of the aiocb will tell more. */
+ result = -1;
+ }
+
+ if (total == 0)
+ {
+ /* We don't have anything to do except signalling if we work
+ asynchronously. */
+
+ /* Release the mutex. We do this before raising a signal since the
+ signal handler might do a `siglongjmp' and then the mutex is
+ locked forever. */
+ pthread_mutex_unlock (&__aio_requests_mutex);
+
+ if (mode == LIO_NOWAIT)
+ __aio_notify_only (sig,
+ sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0);
+
+ return result;
+ }
+ else if (mode == LIO_WAIT)
+ {
+ pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+ struct waitlist waitlist[nent];
+ int oldstate;
+
+ total = 0;
+ for (cnt = 0; cnt < nent; ++cnt)
+ if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP
+ && requests[cnt] != NULL)
+ {
+ waitlist[cnt].cond = &cond;
+ waitlist[cnt].next = requests[cnt]->waiting;
+ waitlist[cnt].counterp = &total;
+ waitlist[cnt].sigevp = NULL;
+ waitlist[cnt].caller_pid = 0; /* Not needed. */
+ requests[cnt]->waiting = &waitlist[cnt];
+ ++total;
+ }
+
+ /* 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);
+
+ while (total > 0)
+ pthread_cond_wait (&cond, &__aio_requests_mutex);
+
+ /* 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 ();
+ }
+ else
+ {
+ struct async_waitlist *waitlist;
+
+ waitlist = (struct async_waitlist *)
+ malloc (sizeof (struct async_waitlist)
+ + (nent * sizeof (struct waitlist)));
+
+ if (waitlist == NULL)
+ {
+ __set_errno (EAGAIN);
+ result = -1;
+ }
+ else
+ {
+ pid_t caller_pid = sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0;
+ total = 0;
+
+ for (cnt = 0; cnt < nent; ++cnt)
+ if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP
+ && requests[cnt] != NULL)
+ {
+ waitlist->list[cnt].cond = NULL;
+ waitlist->list[cnt].next = requests[cnt]->waiting;
+ waitlist->list[cnt].counterp = &waitlist->counter;
+ waitlist->list[cnt].sigevp = &waitlist->sigev;
+ waitlist->list[cnt].caller_pid = caller_pid;
+ requests[cnt]->waiting = &waitlist->list[cnt];
+ ++total;
+ }
+
+ waitlist->counter = total;
+ waitlist->sigev = *sig;
+ }
+ }
+
+ /* Release the mutex. */
+ pthread_mutex_unlock (&__aio_requests_mutex);
+
+ return result;
+}