132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* $NetBSD: subr_lwp_specificdata.c,v 1.2 2010/04/12 23:09:28 christos Exp $ */
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/*-
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* Copyright (c) 2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define _LWP_API_PRIVATE
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: subr_lwp_specificdata.c,v 1.2 2010/04/12 23:09:28 christos Exp $");
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#include <sys/param.h>
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#include <sys/lwp.h>
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#include <sys/specificdata.h>
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static specificdata_domain_t lwp_specificdata_domain;
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void
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lwpinit_specificdata(void)
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{
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lwp_specificdata_domain = specificdata_domain_create();
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KASSERT(lwp_specificdata_domain != NULL);
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}
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/*
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* lwp_specific_key_create --
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* Create a key for subsystem lwp-specific data.
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*/
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int
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lwp_specific_key_create(specificdata_key_t *keyp, specificdata_dtor_t dtor)
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{
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return (specificdata_key_create(lwp_specificdata_domain, keyp, dtor));
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}
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/*
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* lwp_specific_key_delete --
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* Delete a key for subsystem lwp-specific data.
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*/
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void
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lwp_specific_key_delete(specificdata_key_t key)
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{
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specificdata_key_delete(lwp_specificdata_domain, key);
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}
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/*
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* lwp_initspecific --
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* Initialize an LWP's specificdata container.
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*/
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void
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lwp_initspecific(struct lwp *l)
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{
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int error;
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error = specificdata_init(lwp_specificdata_domain, &l->l_specdataref);
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KASSERT(error == 0);
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}
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/*
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* lwp_finispecific --
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* Finalize an LWP's specificdata container.
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*/
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void
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lwp_finispecific(struct lwp *l)
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{
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specificdata_fini(lwp_specificdata_domain, &l->l_specdataref);
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}
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/*
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* lwp_getspecific --
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* Return lwp-specific data corresponding to the specified key.
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*
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* Note: LWP specific data is NOT INTERLOCKED. An LWP should access
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* only its OWN SPECIFIC DATA. If it is necessary to access another
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* LWP's specifc data, care must be taken to ensure that doing so
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* would not cause internal data structure inconsistency (i.e. caller
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* can guarantee that the target LWP is not inside an lwp_getspecific()
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* or lwp_setspecific() call).
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*/
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void *
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lwp_getspecific(specificdata_key_t key)
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{
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return (specificdata_getspecific_unlocked(lwp_specificdata_domain,
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&curlwp->l_specdataref, key));
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}
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void *
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_lwp_getspecific_by_lwp(struct lwp *l, specificdata_key_t key)
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{
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return (specificdata_getspecific_unlocked(lwp_specificdata_domain,
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&l->l_specdataref, key));
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}
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/*
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* lwp_setspecific --
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* Set lwp-specific data corresponding to the specified key.
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*/
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void
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lwp_setspecific(specificdata_key_t key, void *data)
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{
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specificdata_setspecific(lwp_specificdata_domain,
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&curlwp->l_specdataref, key, data);
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}
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