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f5e854388b
* libguile/objprop.c: Add locking around the properties weak hash, to avoid corrupting the whash.
122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/* Copyright (C) 1995,1996, 2000, 2001, 2003, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libguile/_scm.h"
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#include "libguile/async.h"
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#include "libguile/hashtab.h"
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#include "libguile/alist.h"
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#include "libguile/root.h"
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#include "libguile/weaks.h"
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#include "libguile/objprop.h"
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/* {Object Properties}
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*/
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static SCM object_whash;
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static scm_i_pthread_mutex_t whash_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER;
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SCM_DEFINE (scm_object_properties, "object-properties", 1, 0, 0,
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(SCM obj),
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"Return @var{obj}'s property list.")
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#define FUNC_NAME s_scm_object_properties
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{
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SCM ret;
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scm_i_pthread_mutex_lock (&whash_mutex);
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ret = scm_hashq_ref (object_whash, obj, SCM_EOL);
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scm_i_pthread_mutex_unlock (&whash_mutex);
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return ret;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_set_object_properties_x, "set-object-properties!", 2, 0, 0,
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(SCM obj, SCM alist),
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"Set @var{obj}'s property list to @var{alist}.")
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#define FUNC_NAME s_scm_set_object_properties_x
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{
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SCM handle;
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scm_i_pthread_mutex_lock (&whash_mutex);
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handle = scm_hashq_create_handle_x (object_whash, obj, alist);
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SCM_SETCDR (handle, alist);
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scm_i_pthread_mutex_unlock (&whash_mutex);
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return alist;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_object_property, "object-property", 2, 0, 0,
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(SCM obj, SCM key),
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"Return the property of @var{obj} with name @var{key}.")
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#define FUNC_NAME s_scm_object_property
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{
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SCM assoc;
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assoc = scm_assq (key, scm_object_properties (obj));
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return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_set_object_property_x, "set-object-property!", 3, 0, 0,
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(SCM obj, SCM key, SCM value),
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"In @var{obj}'s property list, set the property named @var{key}\n"
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"to @var{value}.")
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#define FUNC_NAME s_scm_set_object_property_x
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{
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SCM h;
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SCM assoc;
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scm_i_pthread_mutex_lock (&whash_mutex);
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h = scm_hashq_create_handle_x (object_whash, obj, SCM_EOL);
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assoc = scm_assq (key, SCM_CDR (h));
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if (SCM_NIMP (assoc))
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SCM_SETCDR (assoc, value);
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else
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{
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assoc = scm_acons (key, value, SCM_CDR (h));
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SCM_SETCDR (h, assoc);
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}
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scm_i_pthread_mutex_unlock (&whash_mutex);
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return value;
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}
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#undef FUNC_NAME
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void
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scm_init_objprop ()
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{
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object_whash = scm_make_weak_key_hash_table (SCM_UNDEFINED);
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#include "libguile/objprop.x"
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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