1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
|
/*
* fifop: a FIFO (first-in first-out) with priorities
*
* (c) 1999-2011 IOhannes m zmölnig, forum::für::umläute, institute of electronic music and acoustics (iem)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "zexy.h"
#include <string.h>
/* ------------------------- fifop ------------------------------- */
/*
* a FIFO (first-in first-out) with priorities
*
* an incoming list is added to a fifo (based on its priority)
* "bang" outputs the next element of the non-empty fifo with the highest priority
*
* high priority means low numeric value
*/
static t_class *fifop_class;
typedef struct _fifop_list {
int argc;
t_atom *argv;
struct _fifop_list *next;
} t_fifop_list;
typedef struct _fifop_prioritylist {
t_float priority;
t_fifop_list *fifo_start;
t_fifop_list *fifo_end;
struct _fifop_prioritylist *next;
} t_fifop_prioritylist;
typedef struct _fifop
{
t_object x_obj;
t_fifop_prioritylist *fifo_list;
t_float priority; /* current priority */
unsigned long counter;
t_outlet *x_out, *x_infout;
} t_fifop;
static t_fifop_prioritylist*fifop_genprioritylist(t_fifop*x, t_float priority)
{
t_fifop_prioritylist*result=0, *dummy=0;
if(x->fifo_list!=0)
{
/*
* do we already have this priority ?
* if so, just return a pointer to that fifo
* else set the dummy-pointer to the fifo BEFORE the new one
*/
dummy=x->fifo_list;
while(dummy!=0){
t_float prio=dummy->priority;
if(prio==priority)return dummy;
if(prio>priority)break;
result=dummy;
dummy=dummy->next;
}
dummy=result; /* dummy points to the FIFO-before the one we want to insert */
}
/* create a new priority list */
result = (t_fifop_prioritylist*)getbytes(sizeof( t_fifop_prioritylist));
result->priority=priority;
result->fifo_start=0;
result->fifo_end=0;
result->next=0;
/* insert it into the list of priority lists */
if(dummy==0){
/* insert at the beginning */
result->next=x->fifo_list;
x->fifo_list=result;
} else {
/* post insert into the list of FIFOs */
result->next=dummy->next;
dummy->next =result;
}
/* return the result */
return result;
}
static int add2fifo(t_fifop_prioritylist*fifoprio, int argc, t_atom *argv)
{
t_fifop_list*fifo=0;
t_fifop_list*entry=0;
if(fifoprio==0){
error("pfifo: no fifos available");
return -1;
}
/* create an entry for the fifo */
if(!(entry = (t_fifop_list*)getbytes(sizeof(t_fifop_list))))
{
error("pfifo: couldn't add entry to end of fifo");
return -1;
}
if(!(entry->argv=(t_atom*)getbytes(argc*sizeof(t_atom)))){
error("pfifo: couldn't add list to fifo!");
return -1;
}
memcpy(entry->argv, argv, argc*sizeof(t_atom));
entry->argc=argc;
entry->next=0;
/* insert entry into fifo */
if(fifoprio->fifo_end){
/* append to the end of the fifo */
fifo=fifoprio->fifo_end;
/* add new entry to end of fifo */
fifo->next=entry;
fifoprio->fifo_end=entry;
} else {
/* the new entry is the 1st entry of the fifo */
fifoprio->fifo_start=entry;
/* and at the same time, it is the last entry */
fifoprio->fifo_end =entry;
}
return 0;
}
static t_fifop_prioritylist*getFifo(t_fifop_prioritylist*pfifo)
{
if(pfifo==0)return 0;
/* get the highest non-empty fifo */
while(pfifo->fifo_start==0 && pfifo->next!=0)pfifo=pfifo->next;
return pfifo;
}
static void fifop_list(t_fifop *x, t_symbol* UNUSED(s), int argc, t_atom *argv)
{
t_fifop_prioritylist*pfifo=0;
if(!(pfifo=fifop_genprioritylist(x, x->priority))) {
error("[fifop]: couldn't get priority fifo");
return;
}
if(!add2fifo(pfifo, argc, argv))
{
x->counter++;
}
}
static void fifop_bang(t_fifop *x)
{
t_fifop_prioritylist*pfifo=0;
t_fifop_list*fifo=0;
t_atom*argv=0;
int argc=0;
if(!(pfifo=getFifo(x->fifo_list))){
outlet_bang(x->x_infout);
return;
}
if(!(fifo=pfifo->fifo_start)){
outlet_bang(x->x_infout);
return;
}
x->counter--;
pfifo->fifo_start=fifo->next;
if(0==pfifo->fifo_start){
pfifo->fifo_end=0;
}
/* get the list from the entry */
argc=fifo->argc;
argv=fifo->argv;
fifo->argc=0;
fifo->argv=0;
fifo->next=0;
/* destroy the fifo-entry (important for recursion! */
freebytes(fifo, sizeof(t_fifop_list));
/* output the list */
outlet_list(x->x_out, gensym("list"), argc, argv);
/* free the list */
freebytes(argv, argc*sizeof(t_atom));
}
static void fifop_query(t_fifop*x)
{
z_verbose(1, "%d elements in fifo", (int)x->counter);
outlet_float(x->x_infout, (t_float)x->counter);
}
static void fifop_clear(t_fifop*x)
{
t_fifop_prioritylist *fifo_list=x->fifo_list;
while(fifo_list){
t_fifop_prioritylist *fifo_list2=fifo_list;
t_fifop_list*fifo=fifo_list2->fifo_start;
fifo_list=fifo_list->next;
while(fifo){
t_fifop_list*fifo2=fifo;
fifo=fifo->next;
if(fifo2->argv)freebytes(fifo2->argv, fifo2->argc*sizeof(t_atom));
fifo2->argv=0;
fifo2->argc=0;
fifo2->next=0;
freebytes(fifo2, sizeof(t_fifop_list));
}
fifo_list2->priority =0;
fifo_list2->fifo_start=0;
fifo_list2->fifo_end =0;
fifo_list2->next =0;
freebytes(fifo_list2, sizeof( t_fifop_prioritylist));
}
x->fifo_list=0;
x->counter=0;
}
/* this is NOT re-entrant! */
static void fifop_dump(t_fifop*x)
{
t_fifop_prioritylist*pfifo=getFifo(x->fifo_list);
if(!pfifo||!pfifo->fifo_start) {
outlet_bang(x->x_infout);
return;
}
while(pfifo) {
t_fifop_list*fifo=pfifo->fifo_start;
while(fifo) {
t_atom*argv=fifo->argv;
int argc=fifo->argc;
/* output the list */
outlet_list(x->x_out, gensym("list"), argc, argv);
fifo=fifo->next;
}
pfifo=pfifo->next;
}
}
static void fifop_help(t_fifop*x)
{
post("\n"HEARTSYMBOL" fifop\t\t:: a First-In-First-Out queue with priorities");
}
static void fifop_free(t_fifop *x)
{
fifop_clear(x);
outlet_free(x->x_out);
outlet_free(x->x_infout);
}
static void *fifop_new(void)
{
t_fifop *x = (t_fifop *)pd_new(fifop_class);
floatinlet_new(&x->x_obj, &x->priority);
x->x_out =outlet_new(&x->x_obj, gensym("list" ));
x->x_infout=outlet_new(&x->x_obj, gensym("float"));
x->fifo_list = 0;
x->priority=0;
return (x);
}
void fifop_setup(void)
{
fifop_class = class_new(gensym("fifop"), (t_newmethod)fifop_new,
(t_method)fifop_free, sizeof(t_fifop), 0, A_NULL);
class_addbang (fifop_class, fifop_bang);
class_addlist (fifop_class, fifop_list);
class_addmethod (fifop_class, (t_method)fifop_clear, gensym("clear"), A_NULL);
class_addmethod (fifop_class, (t_method)fifop_dump, gensym("dump"), A_NULL);
class_addmethod (fifop_class, (t_method)fifop_query, gensym("info"), A_NULL);
class_addmethod (fifop_class, (t_method)fifop_help, gensym("help"), A_NULL);
zexy_register("fifop");
}
|