2003-06-17 Ulrich Drepper <drepper@redhat.com>
+ * sysdeps/unix/clock_nanosleep.c (clock_nanosleep): nanosleep
+ takes care of enabling cancellation.
+
+ * sysdeps/pthread/aio_suspend.c (aio_suspend): Make aio_suspend
+ cancelable. It's not correct to disable cancellation. Instead of
+ a cleanup handler.
+
* sysdeps/unix/sysv/linux/sigtimedwait.c: If SIGCANCEL is defined
and part of the incoming set, create a temporary set without this
signal.
tst-cancel1 tst-cancel2 tst-cancel3 tst-cancel4 tst-cancel5 \
tst-cancel6 tst-cancel7 tst-cancel8 tst-cancel9 tst-cancel10 \
tst-cancel11 tst-cancel12 tst-cancel13 tst-cancel14 tst-cancel15 \
- tst-cancel16 \
+ tst-cancel16 tst-cancel17 \
tst-cleanup0 tst-cleanup1 tst-cleanup2 tst-cleanup3 \
tst-flock1 tst-flock2 \
tst-signal1 tst-signal2 tst-signal3 tst-signal4 tst-signal5 \
tests += tst-cancelx2 tst-cancelx3 tst-cancelx4 tst-cancelx5 \
tst-cancelx6 tst-cancelx7 tst-cancelx8 tst-cancelx9 tst-cancelx10 \
tst-cancelx11 tst-cancelx12 tst-cancelx13 tst-cancelx14 tst-cancelx15\
- tst-cancelx16 \
+ tst-cancelx16 tst-cancelx17 \
tst-cleanupx0 tst-cleanupx1 tst-cleanupx2 tst-cleanupx3
endif
ifeq ($(build-shared),yes)
CFLAGS-tst-cancelx14.c += -fexceptions
CFLAGS-tst-cancelx15.c += -fexceptions
CFLAGS-tst-cancelx16.c += -fexceptions
+CFLAGS-tst-cancelx17.c += -fexceptions
CFLAGS-tst-cleanupx0.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-tst-cleanupx1.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-tst-cleanupx2.c += -fexceptions
ifeq (yes,$(build-shared))
$(objpfx)tst-cond11: $(common-objpfx)rt/librt.so
+$(objpfx)tst-cancel17: $(common-objpfx)rt/librt.so
+$(objpfx)tst-cancelx17: $(common-objpfx)rt/librt.so
else
$(objpfx)tst-cond11: $(common-objpfx)rt/librt.a
+$(objpfx)tst-cancel17: $(common-objpfx)rt/librt.a
+$(objpfx)tst-cancelx17: $(common-objpfx)rt/librt.a
endif
extra-B-pthread.so = -B$(common-objpfx)nptl/
--- /dev/null
+#include <nptl/pthreadP.h>
+#include "../../../../../sysdeps/unix/sysv/linux/sigtimedwait.c"
--- /dev/null
+#include <nptl/pthreadP.h>
+#include "../../../../../sysdeps/unix/sysv/linux/sigwait.c"
--- /dev/null
+#include <nptl/pthreadP.h>
+#include "../../../../../sysdeps/unix/sysv/linux/sigwaitinfo.c"
--- /dev/null
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <aio.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static pthread_barrier_t b;
+
+
+/* Cleanup handling test. */
+static int cl_called;
+
+static void
+cl (void *arg)
+{
+ ++cl_called;
+}
+
+
+static void *
+tf (void *arg)
+{
+ int r = pthread_barrier_wait (&b);
+ if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
+ {
+ puts ("barrier_wait failed");
+ exit (1);
+ }
+
+ pthread_cleanup_push (cl, NULL);
+
+ const struct aiocb *l[1] = { arg };
+
+ aio_suspend (l, 1, NULL);
+
+ pthread_cleanup_pop (0);
+
+ puts ("aio_suspend returned");
+
+ exit (1);
+}
+
+
+static int
+do_test (void)
+{
+ int fds[2];
+ if (pipe (fds) != 0)
+ {
+ puts ("pipe failed");
+ return 1;
+ }
+
+ struct aiocb a;
+ char mem[1];
+ memset (&a, '\0', sizeof (a));
+ a.aio_fildes = fds[0];
+ a.aio_buf = mem;
+ a.aio_nbytes = sizeof (mem);
+ if (aio_read (&a) != 0)
+ {
+ puts ("aio_read failed");
+ return 1;
+ }
+
+ if (pthread_barrier_init (&b, NULL, 2) != 0)
+ {
+ puts ("barrier_init failed");
+ return 1;
+ }
+
+ pthread_t th;
+ if (pthread_create (&th, NULL, tf, &a) != 0)
+ {
+ puts ("1st create failed");
+ return 1;
+ }
+
+ int r = pthread_barrier_wait (&b);
+ if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
+ {
+ puts ("barrier_wait failed");
+ exit (1);
+ }
+
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 };
+ while (nanosleep (&ts, &ts) != 0)
+ continue;
+
+ puts ("going to cancel in-time");
+ if (pthread_cancel (th) != 0)
+ {
+ puts ("1st cancel failed");
+ return 1;
+ }
+
+ void *status;
+ if (pthread_join (th, &status) != 0)
+ {
+ puts ("1st join failed");
+ return 1;
+ }
+ if (status != PTHREAD_CANCELED)
+ {
+ puts ("1st thread not canceled");
+ return 1;
+ }
+
+ if (cl_called == 0)
+ {
+ puts ("cleanup handler not called");
+ return 1;
+ }
+ if (cl_called > 1)
+ {
+ puts ("cleanup handler called more than once");
+ return 1;
+ }
+
+ puts ("in-time cancellation succeeded");
+ aio_cancel (fds[0], &a);
+
+
+ cl_called = 0;
+
+ memset (&a, '\0', sizeof (a));
+ a.aio_fildes = fds[1];
+ a.aio_buf = mem;
+ a.aio_nbytes = sizeof (mem);
+ if (aio_write (&a) != 0)
+ {
+ puts ("aio_write failed");
+ return 1;
+ }
+
+ if (pthread_create (&th, NULL, tf, &a) != 0)
+ {
+ puts ("2nd create failed");
+ return 1;
+ }
+
+ puts ("going to cancel early");
+ if (pthread_cancel (th) != 0)
+ {
+ puts ("2nd cancel failed");
+ return 1;
+ }
+
+ r = pthread_barrier_wait (&b);
+ if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
+ {
+ puts ("barrier_wait failed");
+ exit (1);
+ }
+
+ if (pthread_join (th, &status) != 0)
+ {
+ puts ("2nd join failed");
+ return 1;
+ }
+ if (status != PTHREAD_CANCELED)
+ {
+ puts ("2nd thread not canceled");
+ return 1;
+ }
+
+ if (cl_called == 0)
+ {
+ printf ("cleanup handler not called\n");
+ return 1;
+ }
+ if (cl_called > 1)
+ {
+ printf ("cleanup handler called more than once\n");
+ return 1;
+ }
+
+ puts ("early cancellation succeeded");
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
--- /dev/null
+#include "tst-cancel17.c"
#include <stdlib.h>
#include <sys/time.h>
+#include <bits/libc-lock.h>
#include "aio_misc.h"
+struct clparam
+{
+ const struct aiocb *const *list;
+ struct waitlist *waitlist;
+ struct requestlist **requestlist;
+ pthread_cond_t *cond;
+ int nent;
+};
+
+
+static void
+cleanup (void *arg)
+{
+ 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 = ¶m->requestlist[cnt]->waiting;
+ while (*listp != NULL && *listp != ¶m->waitlist[cnt])
+ listp = &(*listp)->next;
+
+ if (*listp != NULL)
+ *listp = (*listp)->next;
+ }
+
+ /* Release the conditional variable. */
+ (void) pthread_cond_destroy (param->cond);
+
+ /* Release the mutex. */
+ pthread_mutex_unlock (&__aio_requests_mutex);
+}
+
+
int
aio_suspend (list, nent, timeout)
const struct aiocb *const list[];
/* Only if none of the entries is NULL or finished to be wait. */
if (cnt == nent && any)
{
- int oldstate;
+ struct clparam clparam =
+ {
+ .list = list,
+ .waitlist = waitlist,
+ .requestlist = requestlist,
+ .cond = &cond,
+ .nent = nent
+ };
- /* 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);
+ __libc_cleanup_region_start (1, cleanup, &clparam);
if (timeout == NULL)
result = pthread_cond_wait (&cond, &__aio_requests_mutex);
&abstime);
}
- /* Now it's time to restore the cancellation state. */
- pthread_setcancelstate (oldstate, NULL);
+ __libc_cleanup_region_end (0);
}
/* Now remove the entry in the waiting list for all requests
/* Not supported. */
return ENOTSUP;
- if (SINGLE_THREAD_P)
- return __builtin_expect (nanosleep (req, rem), 0) ? errno : 0;
-
- /* More than one thread running, enable cancellation. */
- int oldstate = LIBC_CANCEL_ASYNC ();
-
- int result = __builtin_expect (nanosleep (req, rem), 0) ? errno : 0;
-
- LIBC_CANCEL_RESET (oldstate);
-
- return result;
+ return __builtin_expect (nanosleep (req, rem), 0) ? errno : 0;
}
git://sourceware.org / glibc.git / commitdiff