This is my initial working version.

There is a bug in boot in this version: subhurd sometimes cannot boot.

1 files changed, 63 insertions, 0 deletions

diff --git a/libpthread/pthread/pt-dealloc.c b/libpthread/pthread/pt-dealloc.c
new file mode 100644
index 00000000..1fc7a7b3
--- /dev/null
+++ b/libpthread/pthread/pt-dealloc.c
@@ -0,0 +1,63 @@
+/* Deallocate a thread structure.
+   Copyright (C) 2000 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 <assert.h>
+#include <pthread.h>
+#include <stdlib.h>
+
+#include <pt-internal.h>
+
+#include <bits/atomic.h>
+
+/* List of thread structures corresponding to free thread IDs.  */
+extern __atomicptr_t __pthread_free_threads;
+
+/* Deallocate the thread structure for PTHREAD and the resources
+   associated with it.  */
+void
+__pthread_dealloc (struct __pthread *pthread)
+{
+  assert (pthread->state != PTHREAD_TERMINATED);
+
+  /* Withdraw this thread from the thread ID lookup table.  */
+  __pthread_setid (pthread->thread, NULL);
+
+  /* Mark the thread as terminated.  We broadcast the condition
+     here to prevent pthread_join from waiting for this thread to
+     exit where it was never really started.  Such a call to
+     pthread_join is completely bogus, but unfortunately allowed
+     by the standards.  */
+  __pthread_mutex_lock (&pthread->state_lock);
+  pthread->state = PTHREAD_TERMINATED;
+  if (pthread->state != PTHREAD_EXITED)
+    pthread_cond_broadcast (&pthread->state_cond);
+  __pthread_mutex_unlock (&pthread->state_lock);
+
+  /* We do not actually deallocate the thread structure, but add it to
+     a list of re-usable thread structures.  */
+  while (1)
+    {
+      pthread->next = (struct __pthread *)__pthread_free_threads;
+      if (__atomicptr_compare_and_swap (&__pthread_free_threads,
+					pthread->next, pthread))
+	return;
+    }
+
+  /* NOTREACHED */
+}