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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2018-04-02 01:43:22 +0200
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2018-04-02 01:44:14 +0200
commit33574c17eefcf326c1cd30eb9f915ad26d3d9ef2 (patch)
tree2c1b143f2b7a0ceba9fba000b70dd2889d56e60f /htl/pt-join.c
parent03e2aa50fd512449025bba8c244d16338d8526a4 (diff)
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hurd: Add hurd thread library
Contributed by Agustina Arzille <avarzille@riseup.net> Amos Jeffries <squid3@treenet.co.nz> David Michael <fedora.dm0@gmail.com> Marco Gerards <marco@gnu.org> Marcus Brinkmann <marcus@gnu.org> Neal H. Walfield <neal@gnu.org> Pino Toscano <toscano.pino@tiscali.it> Richard Braun <rbraun@sceen.net> Roland McGrath <roland@gnu.org> Samuel Thibault <samuel.thibault@ens-lyon.org> Thomas DiModica <ricinwich@yahoo.com> Thomas Schwinge <tschwinge@gnu.org> * htl: New directory. * sysdeps/htl: New directory. * sysdeps/hurd/htl: New directory. * sysdeps/i386/htl: New directory. * sysdeps/mach/htl: New directory. * sysdeps/mach/hurd/htl: New directory. * sysdeps/mach/hurd/i386/htl: New directory. * nscd/Depend, resolv/Depend, rt/Depend: Add htl dependency. * sysdeps/mach/hurd/i386/Implies: Add mach/hurd/i386/htl imply. * sysdeps/mach/hurd/i386/libpthread.abilist: New file.
Diffstat (limited to 'htl/pt-join.c')
-rw-r--r--htl/pt-join.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/htl/pt-join.c b/htl/pt-join.c
new file mode 100644
index 0000000000..329163d514
--- /dev/null
+++ b/htl/pt-join.c
@@ -0,0 +1,75 @@
+/* Wait for thread termination.
+ Copyright (C) 2000-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, see <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stddef.h>
+
+#include <pt-internal.h>
+
+/* Make calling thread wait for termination of thread THREAD. Return
+ the exit status of the thread in *STATUS. */
+int
+pthread_join (pthread_t thread, void **status)
+{
+ struct __pthread *pthread;
+ int err = 0;
+
+ /* Lookup the thread structure for THREAD. */
+ pthread = __pthread_getid (thread);
+ if (pthread == NULL)
+ return ESRCH;
+
+ __pthread_mutex_lock (&pthread->state_lock);
+ pthread_cleanup_push ((void (*)(void *)) __pthread_mutex_unlock,
+ &pthread->state_lock);
+
+ /* Rely on pthread_cond_wait being a cancellation point to make
+ pthread_join one too. */
+ while (pthread->state == PTHREAD_JOINABLE)
+ __pthread_cond_wait (&pthread->state_cond, &pthread->state_lock);
+
+ pthread_cleanup_pop (0);
+
+ switch (pthread->state)
+ {
+ case PTHREAD_EXITED:
+ /* THREAD has already exited. Salvage its exit status. */
+ if (status != NULL)
+ *status = pthread->status;
+
+ __pthread_mutex_unlock (&pthread->state_lock);
+
+ __pthread_dealloc (pthread);
+ break;
+
+ case PTHREAD_TERMINATED:
+ /* Pretend THREAD wasn't there in the first place. */
+ __pthread_mutex_unlock (&pthread->state_lock);
+ err = ESRCH;
+ break;
+
+ default:
+ /* Thou shalt not join non-joinable threads! */
+ __pthread_mutex_unlock (&pthread->state_lock);
+ err = EINVAL;
+ break;
+ }
+
+ return err;
+}