From f19e83eb2a17d0e87b90a050e7550e1e6985196f Mon Sep 17 00:00:00 2001 From: "Neal H. Walfield" Date: Wed, 4 May 2005 16:04:06 +0000 Subject: libpthread/ 2005-05-04 Neal H. Walfield * Makefile (SRCS): Add pt-thread_dealloc.c. * sysdeps/mach/pt-thread-dealloc.c: New file. * pthread/pt-internal.h (__pthread_thread_dealloc): New declaration. (__pthread_thread_halt): Add parameter NEED_DEALLOC. Update callers. * sysdeps/mach/pt-thread-halt.c (__pthread_thread_halt): Respect new NEED_DEALLOC parameter. Move code which deallocates kernel resources from here ... * sysdeps/mach/pt-thread-dealloc.c (__pthread_thread_dealloc): ...to here. * pthread/pt-create.c (__pthread_create_internal): Call __pthread_thread_dealloc on failure. * pthread/pt-exit.c (pthread_exit): Call __pthread_thread_dealloc. * sysdeps/mach/pt-thread-alloc.c (create_wakeupmsg): Call __mach_port_destroy to deallocate the receive right. __mach_port_deallocate won't do it. * pthread/pt-detach.c (pthread_detach): Don't call __pthread_thread_halt a second time. * sysdeps/mach/hurd/pt-sysdep.c (_cthread_init_routine): Fix declaration. (init_routine): Update declaration and remove gratuitous cast. --- sysdeps/mach/pt-thread-dealloc.c | 41 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 sysdeps/mach/pt-thread-dealloc.c (limited to 'sysdeps/mach/pt-thread-dealloc.c') diff --git a/sysdeps/mach/pt-thread-dealloc.c b/sysdeps/mach/pt-thread-dealloc.c new file mode 100644 index 0000000..55d8c4d --- /dev/null +++ b/sysdeps/mach/pt-thread-dealloc.c @@ -0,0 +1,41 @@ +/* Deallocate the kernel thread resources. Mach version. + Copyright (C) 2005 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, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include +#include +#include + +#include + +/* Deallocate any kernel resources associated with THREAD except don't + halt the thread itself. On return, the thread will be marked as + dead and __pthread_halt will be called. */ +void +__pthread_thread_dealloc (struct __pthread *thread) +{ + /* Why no assert? Easy. When Mach kills a task, it starts by + invalidating the task port and then terminating the threads one + by one. But while it is terminating them, they are still + eligible to be scheduled. Imagine we have two threads, one calls + exit, one calls pthread_exit. The second one may run this after + the mask port can been destroyed thus gratuitously triggering the + assert. */ + __mach_port_destroy (__mach_task_self (), + thread->wakeupmsg.msgh_remote_port); +} -- cgit v1.2.3