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1998-05-04 12:40  Ulrich Drepper  <drepper@cygnus.com>

	* malloc/malloc.c (ptmalloc_init_all): New function.  Similar to
	ptmalloc_unlock_all, but re-initializes the mutexes instead.
	(ptmalloc_init): Use new function in thread_at_fork call.
	(thread_atfork_static): Likewise.
	Suggested by Wolfram Gloger and Xavier Leroy.
This commit is contained in:
Ulrich Drepper
1998-05-04 13:19:20 +00:00
parent 15f32e7b79
commit eb4063467c
12 changed files with 182 additions and 41 deletions
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24
malloc/malloc.c
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@@ -1,5 +1,5 @@
/* Malloc implementation for multiple threads without lock contention.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
and Doug Lea <dl@cs.oswego.edu>, 1996.
@@ -1579,6 +1579,24 @@ ptmalloc_unlock_all __MALLOC_P((void))
(void)mutex_unlock(&list_lock);
}
static void
ptmalloc_init_all __MALLOC_P((void))
{
arena *ar_ptr;
#if defined _LIBC || defined MALLOC_HOOKS
tsd_setspecific(arena_key, save_arena);
__malloc_hook = save_malloc_hook;
__free_hook = save_free_hook;
#endif
for(ar_ptr = &main_arena;;) {
(void)mutex_init(&ar_ptr->mutex);
ar_ptr = ar_ptr->next;
if(ar_ptr == &main_arena) break;
}
(void)mutex_init(&list_lock);
}
/* Initialization routine. */
#if defined(_LIBC)
#if 0
@@ -1617,7 +1635,7 @@ ptmalloc_init __MALLOC_P((void))
mutex_init(&list_lock);
tsd_key_create(&arena_key, NULL);
tsd_setspecific(arena_key, (Void_t *)&main_arena);
thread_atfork(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all);
thread_atfork(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_init_all);
#endif
#if defined _LIBC || defined MALLOC_HOOKS
if((s = getenv("MALLOC_TRIM_THRESHOLD_")))
@@ -1644,7 +1662,7 @@ ptmalloc_init __MALLOC_P((void))
/* There are platforms (e.g. Hurd) with a link-time hook mechanism. */
#ifdef thread_atfork_static
thread_atfork_static(ptmalloc_lock_all, ptmalloc_unlock_all, \
ptmalloc_unlock_all)
ptmalloc_init_all)
#endif
#if defined _LIBC || defined MALLOC_HOOKS