1 /***********************************************************************
2  *                                                                      *
3  *               This software is part of the ast package               *
4  *          Copyright (c) 1985-2013 AT&T Intellectual Property          *
5  *                      and is licensed under the                       *
6  *                 Eclipse Public License, Version 1.0                  *
7  *                    by AT&T Intellectual Property                     *
8  *                                                                      *
9  *                A copy of the License is available at                 *
10  *          http://www.eclipse.org/org/documents/epl-v10.html           *
11  *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12  *                                                                      *
13  *              Information and Software Systems Research               *
14  *                            AT&T Research                             *
15  *                           Florham Park NJ                            *
16  *                                                                      *
17  *               Glenn Fowler <glenn.s.fowler@gmail.com>                *
18  *                    David Korn <dgkorn@gmail.com>                     *
19  *                     Phong Vo <phongvo@gmail.com>                     *
20  *                                                                      *
21  ***********************************************************************/
22 #include "config_ast.h"  // IWYU pragma: keep
23 
24 #include <pthread.h>
25 
26 #include "ast_aso.h"
27 #include "cdt.h"
28 #include "cdtlib.h"
29 
30 /* Perform various functions on the user's behalf.
31 **
32 ** Written by Kiem-Phong Vo, phongvo@gmail.com (01/05/2012)
33 */
34 
35 // Lock dt->data->user.lock.
dtuserlock(Dt_t * dt)36 int dtuserlock(Dt_t *dt) { return pthread_mutex_lock(&dt->data->user.lock); }
37 
38 // Unlock dt->data->user.lock.
dtuserunlock(Dt_t * dt)39 int dtuserunlock(Dt_t *dt) { return pthread_mutex_unlock(&dt->data->user.lock); }
40 
41 /* managing the user data slot dt->data->user.data */
dtuserdata(Dt_t * dt,void * data,int set)42 void *dtuserdata(Dt_t *dt, void *data, int set) {
43     if (set == 0) return asogetptr(&dt->data->user.data);  // just return current value
44     while (1) {
45         void *current = dt->data->user.data;
46         if (asocasptr(&dt->data->user.data, current, data) == current) return current;
47     }
48 }
49