1028ce923e
The solaris sources use a non-portable create-thread-suspended flag when spawning the update thread; I've thrown together a pthreads portable equivalent. This has not had any real level of testing. These changes include a lock around the underlying brk() call; the lack of lock in earlier revisions of this repo may be the reason that UMEM_OPTIONS=backend=sbrk was flaky.
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/* #pragma ident "@(#)vmem_base.c 1.6 05/06/08 SMI" */
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/* #include "mtlib.h" */
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#include "config.h"
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#include "vmem_base.h"
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#include "umem_base.h"
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uint_t vmem_backend = 0;
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vmem_t *
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vmem_heap_arena(vmem_alloc_t **allocp, vmem_free_t **freep)
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{
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static mutex_t arena_mutex = DEFAULTMUTEX;
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/*
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* Allow the init thread through, block others until the init completes
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*/
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if (umem_ready != UMEM_READY && umem_init_thr != thr_self() &&
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umem_init() == 0)
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return (NULL);
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(void) mutex_lock(&arena_mutex);
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if (vmem_heap == NULL)
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vmem_heap_init();
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(void) mutex_unlock(&arena_mutex);
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if (allocp != NULL)
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*allocp = vmem_heap_alloc;
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if (freep != NULL)
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*freep = vmem_heap_free;
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return (vmem_heap);
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}
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