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callback.c
1 /*
2 * $Id: callback.c,v 1.5 2003/12/01 09:10:14 troth Exp $
3 *
4 ****************************************************************************
5 *
6 * simulavr - A simulator for the Atmel AVR family of microcontrollers.
7 * Copyright (C) 2001, 2002, 2003 Theodore A. Roth
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 ****************************************************************************
24 */
25
26 #include <config.h>
27
28 #include <stdio.h>
29 #include <stdlib.h>
30
31 #include "avrerror.h"
32 #include "avrmalloc.h"
33 #include "avrclass.h"
34 #include "utils.h"
35 #include "callback.h"
36
37 /****************************************************************************\
38 *
39 * Clock Call Back methods
40 *
41 \****************************************************************************/
42
43 #ifndef DOXYGEN /* don't expose to doxygen */
44
45 struct _CallBack
46 {
47 AvrClass parent;
48 CallBack_FP func; /* the callback function */
49 AvrClass *data; /* user data to be passed to callback
50 function */
51 };
52
53 #endif /* DOXYGEN */
54
55 CallBack *
56 callback_new (CallBack_FP func, AvrClass *data)
57 {
58 CallBack *cb;
59
60 cb = avr_new (CallBack, 1);
61 callback_construct (cb, func, data);
62 class_overload_destroy ((AvrClass *)cb, callback_destroy);
63
64 return cb;
65 }
66
67 void
68 callback_construct (CallBack *cb, CallBack_FP func, AvrClass *data)
69 {
70 if (cb == NULL)
71 avr_error ("passed null ptr");
72
73 class_construct ((AvrClass *)cb);
74
75 cb->func = func;
76
77 cb->data = data;
78
79 if (data)
80 class_ref (data);
81 }
82
83 void
84 callback_destroy (void *cb)
85 {
86 CallBack *_cb = (CallBack *)cb;
87
88 if (cb == NULL)
89 return;
90
91 if (_cb->data)
92 class_unref (_cb->data);
93
94 class_destroy (cb);
95 }
96
97 DList *
98 callback_list_add (DList *head, CallBack *cb)
99 {
100 return dlist_add (head, (AvrClass *)cb, NULL);
101 }
102
103 static int
104 callback_execute (AvrClass *data, void *user_data)
105 {
106 CallBack *cb = (CallBack *)data;
107 uint64_t time = *(uint64_t *) user_data;
108
109 return cb->func (time, cb->data);
110 }
111
112 DList *
113 callback_list_execute_all (DList *head, uint64_t time)
114 {
115 return dlist_iterator (head, callback_execute, &time);
116 }
avr_new
#define avr_new(type, count)
Macro for allocating memory.
Definition: avrmalloc.c:57
dlist_iterator
DList * dlist_iterator(DList *head, DListFP_Iter func, void *user_data)
Iterate over all elements of the list.
Definition: utils.c:357
class_ref
void class_ref(AvrClass *klass)
Increments the reference count for the klass object.
Definition: avrclass.c:106
dlist_add
DList * dlist_add(DList *head, AvrClass *data, DListFP_Cmp cmp)
Add a new node to the end of the list.
Definition: utils.c:159
class_destroy
void class_destroy(void *klass)
Releases resources allocated by class&#39;s <klass>_new() function.
Definition: avrclass.c:78
class_unref
void class_unref(AvrClass *klass)
Decrements the reference count for the klass object.
Definition: avrclass.c:120
avr_error
#define avr_error(fmt, args...)
Print an error message to stderr and terminate program.
Definition: avrerror.c:50
class_overload_destroy
void class_overload_destroy(AvrClass *klass, AvrClassFP_Destroy destroy)
Overload the default destroy method.
Definition: avrclass.c:92
class_construct
void class_construct(AvrClass *klass)
Initializes the AvrClass data structure.
Definition: avrclass.c:61

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