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authorLeonid Lisovskiy <lly.dev@gmail.com>2016-01-03 21:49:51 +0300
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-01-06 23:54:29 +0100
commitc1b5c59ece6b223f2941769ec484da4d0dc2baa6 (patch)
tree929db231c662b8fd10248aa5ec920113b62b7024
parent16fc66a4faf631fffa518eb7806ec70e03c78f63 (diff)
linuxthreads.old: Implement pthread_tryjoin_np(), pthread_timedjoin_np()
Some applications needs it. Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>
-rw-r--r--libpthread/linuxthreads.old/join.c138
-rw-r--r--libpthread/linuxthreads.old/sysdeps/pthread/pthread.h15
-rw-r--r--test/pthread/tst-join2.c104
-rw-r--r--test/pthread/tst-join3.c123
4 files changed, 380 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/join.c b/libpthread/linuxthreads.old/join.c
index 4a7c0d8ac..c7e547951 100644
--- a/libpthread/linuxthreads.old/join.c
+++ b/libpthread/linuxthreads.old/join.c
@@ -192,6 +192,144 @@ int pthread_join(pthread_t thread_id, void ** thread_return)
return 0;
}
+int pthread_tryjoin_np(pthread_t thread_id, void ** thread_return)
+{
+ volatile pthread_descr self = thread_self();
+ struct pthread_request request;
+ pthread_handle handle = thread_handle(thread_id);
+ pthread_descr th;
+ int result = 0;
+
+ /* Make sure the descriptor is valid. */
+ __pthread_lock(&handle->h_lock, self);
+ if (invalid_handle(handle, thread_id)) {
+ result = ESRCH;
+ goto err;
+ }
+ th = handle->h_descr;
+ /* Is the thread joinable?. */
+ if (th->p_detached || th->p_joining != NULL) {
+ result = EINVAL;
+ goto err;
+ }
+ if (th == self) {
+ result = EDEADLK;
+ goto err;
+ }
+ /* Return right away if the thread hasn't terminated yet. */
+ if (! th->p_terminated) {
+ result = EBUSY;
+ goto err;
+ }
+
+ /* Get return value */
+ if (thread_return != NULL) *thread_return = th->p_retval;
+ __pthread_unlock(&handle->h_lock);
+ /* Send notification to thread manager */
+ if (__pthread_manager_request >= 0) {
+ request.req_thread = self;
+ request.req_kind = REQ_FREE;
+ request.req_args.free.thread_id = thread_id;
+ TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ }
+ return 0;
+
+err:
+ __pthread_unlock(&handle->h_lock);
+ return result;
+}
+
+int pthread_timedjoin_np(pthread_t thread_id, void ** thread_return,
+ const struct timespec *abstime)
+{
+ volatile pthread_descr self = thread_self();
+ struct pthread_request request;
+ pthread_handle handle = thread_handle(thread_id);
+ pthread_descr th;
+ pthread_extricate_if extr;
+ int already_canceled = 0;
+ int result = 0;
+ PDEBUG("\n");
+
+ /* Set up extrication interface */
+ extr.pu_object = handle;
+ extr.pu_extricate_func = join_extricate_func;
+
+ __pthread_lock(&handle->h_lock, self);
+ if (invalid_handle(handle, thread_id)) {
+ result = ESRCH;
+ goto err;
+ }
+ th = handle->h_descr;
+ if (th == self) {
+ result = EDEADLK;
+ goto err;
+ }
+ /* If detached or already joined, error */
+ if (th->p_detached || th->p_joining != NULL) {
+ result = EINVAL;
+ goto err;
+ }
+ /* If not terminated yet, suspend ourselves. */
+ if (! th->p_terminated) {
+ /* Register extrication interface */
+ __pthread_set_own_extricate_if(self, &extr);
+ if (!(THREAD_GETMEM(self, p_canceled)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE))
+ th->p_joining = self;
+ else
+ already_canceled = 1;
+ __pthread_unlock(&handle->h_lock);
+
+ if (already_canceled) {
+ __pthread_set_own_extricate_if(self, 0);
+ __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
+ }
+
+ PDEBUG("before suspend\n");
+ result = (timedsuspend(self, abstime) == 0) ? ETIMEDOUT : 0;
+ PDEBUG("after suspend\n");
+ /* Deregister extrication interface */
+ __pthread_set_own_extricate_if(self, 0);
+
+ /* This is a cancellation point */
+ if (result == 0
+ && THREAD_GETMEM(self, p_woken_by_cancel)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) {
+ THREAD_SETMEM(self, p_woken_by_cancel, 0);
+ __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
+ }
+ __pthread_lock(&handle->h_lock, self);
+ }
+
+ /* We might have timed out. */
+ if (result == 0) {
+ /* Get return value */
+ if (thread_return != NULL) *thread_return = th->p_retval;
+ }
+ else
+ th->p_joining = NULL;
+
+ __pthread_unlock(&handle->h_lock);
+
+ if (result == 0) {
+ /* Send notification to thread manager */
+ if (__pthread_manager_request >= 0) {
+ request.req_thread = self;
+ request.req_kind = REQ_FREE;
+ request.req_args.free.thread_id = thread_id;
+ TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ }
+ }
+ return result;
+
+err:
+ __pthread_unlock(&handle->h_lock);
+ return result;
+}
+
int pthread_detach(pthread_t thread_id)
{
int terminated;
diff --git a/libpthread/linuxthreads.old/sysdeps/pthread/pthread.h b/libpthread/linuxthreads.old/sysdeps/pthread/pthread.h
index 879bcea4e..3c7044d8b 100644
--- a/libpthread/linuxthreads.old/sysdeps/pthread/pthread.h
+++ b/libpthread/linuxthreads.old/sysdeps/pthread/pthread.h
@@ -179,6 +179,21 @@ extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__));
is not NULL. */
extern int pthread_join (pthread_t __th, void **__thread_return);
+#ifdef __USE_GNU
+/* Check whether thread TH has terminated. If yes return the status of
+ the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL. */
+extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW;
+
+/* Make calling thread wait for termination of the thread TH, but only
+ until TIMEOUT. The exit status of the thread is stored in
+ *THREAD_RETURN, if THREAD_RETURN is not NULL.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return,
+ __const struct timespec *__abstime);
+#endif
+
/* Indicate that the thread TH is never to be joined with PTHREAD_JOIN.
The resources of TH will therefore be freed immediately when it
terminates, instead of waiting for another thread to perform PTHREAD_JOIN
diff --git a/test/pthread/tst-join2.c b/test/pthread/tst-join2.c
new file mode 100644
index 000000000..2cfab8b0e
--- /dev/null
+++ b/test/pthread/tst-join2.c
@@ -0,0 +1,104 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+static void *
+tf (void *arg)
+{
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("child: mutex_lock failed");
+ return NULL;
+ }
+
+ return (void *) 42l;
+}
+
+
+static int
+do_test (void)
+{
+ pthread_t th;
+
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("mutex_lock failed");
+ exit (1);
+ }
+
+ if (pthread_create (&th, NULL, tf, NULL) != 0)
+ {
+ puts ("mutex_create failed");
+ exit (1);
+ }
+
+ void *status;
+ int val = pthread_tryjoin_np (th, &status);
+ if (val == 0)
+ {
+ puts ("1st tryjoin succeeded");
+ exit (1);
+ }
+ else if (val != EBUSY)
+ {
+ puts ("1st tryjoin didn't return EBUSY");
+ exit (1);
+ }
+
+ if (pthread_mutex_unlock (&lock) != 0)
+ {
+ puts ("mutex_unlock failed");
+ exit (1);
+ }
+
+ while ((val = pthread_tryjoin_np (th, &status)) != 0)
+ {
+ if (val != EBUSY)
+ {
+ printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",
+ strerror (val), val);
+ exit (1);
+ }
+
+ /* Delay minimally. */
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
+ nanosleep (&ts, NULL);
+ }
+
+ if (status != (void *) 42l)
+ {
+ printf ("return value %p, expected %p\n", status, (void *) 42l);
+ exit (1);
+ }
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/test/pthread/tst-join3.c b/test/pthread/tst-join3.c
new file mode 100644
index 000000000..df1135fb5
--- /dev/null
+++ b/test/pthread/tst-join3.c
@@ -0,0 +1,123 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+static void *
+tf (void *arg)
+{
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("child: mutex_lock failed");
+ return NULL;
+ }
+
+ return (void *) 42l;
+}
+
+
+static int
+do_test (void)
+{
+ pthread_t th;
+
+ if (pthread_mutex_lock (&lock) != 0)
+ {
+ puts ("mutex_lock failed");
+ exit (1);
+ }
+
+ if (pthread_create (&th, NULL, tf, NULL) != 0)
+ {
+ puts ("mutex_create failed");
+ exit (1);
+ }
+
+ void *status;
+ struct timespec ts;
+ struct timeval tv;
+ (void) gettimeofday (&tv, NULL);
+ TIMEVAL_TO_TIMESPEC (&tv, &ts);
+ ts.tv_nsec += 200000000;
+ if (ts.tv_nsec >= 1000000000)
+ {
+ ts.tv_nsec -= 1000000000;
+ ++ts.tv_sec;
+ }
+ int val = pthread_timedjoin_np (th, &status, &ts);
+ if (val == 0)
+ {
+ puts ("1st timedjoin succeeded");
+ exit (1);
+ }
+ else if (val != ETIMEDOUT)
+ {
+ puts ("1st timedjoin didn't return ETIMEDOUT");
+ exit (1);
+ }
+
+ if (pthread_mutex_unlock (&lock) != 0)
+ {
+ puts ("mutex_unlock failed");
+ exit (1);
+ }
+
+ while (1)
+ {
+ (void) gettimeofday (&tv, NULL);
+ TIMEVAL_TO_TIMESPEC (&tv, &ts);
+ ts.tv_nsec += 200000000;
+ if (ts.tv_nsec >= 1000000000)
+ {
+ ts.tv_nsec -= 1000000000;
+ ++ts.tv_sec;
+ }
+
+ val = pthread_timedjoin_np (th, &status, &ts);
+ if (val == 0)
+ break;
+
+ if (val != ETIMEDOUT)
+ {
+ printf ("timedjoin returned %s (%d), expected only 0 or ETIMEDOUT\n",
+ strerror (val), val);
+ exit (1);
+ }
+ }
+
+ if (status != (void *) 42l)
+ {
+ printf ("return value %p, expected %p\n", status, (void *) 42l);
+ exit (1);
+ }
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"