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
|
#include <string.h>
#include "midimonster.h"
#include "backend.h"
static size_t nbackends = 0;
static backend* backends = NULL;
static size_t ninstances = 0;
static instance** instances = NULL;
static size_t nchannels = 0;
static channel** channels = NULL;
int backends_handle(size_t nfds, managed_fd* fds){
size_t u, p, n;
int rv = 0;
managed_fd xchg;
for(u = 0; u < nbackends && !rv; u++){
n = 0;
for(p = 0; p < nfds; p++){
if(fds[p].backend == backends + u){
xchg = fds[n];
fds[n] = fds[p];
fds[p] = xchg;
n++;
}
}
rv |= backends[u].process(n, fds);
}
return rv;
}
int backends_notify(size_t nev, channel* c, channel_value* v){
//TODO
return 1;
}
channel* mm_channel(instance* i, uint64_t ident, uint8_t create){
size_t u;
for(u = 0; u < nchannels; u++){
if(channels[u]->instance == i && channels[u]->ident == ident){
return channels[u];
}
}
if(!create){
return NULL;
}
channel** new_chan = realloc(channels, (nchannels + 1) * sizeof(channel*));
if(!new_chan){
fprintf(stderr, "Failed to allocate memory\n");
nchannels = 0;
return NULL;
}
channels = new_chan;
channels[nchannels] = calloc(1, sizeof(channel));
if(!channels[nchannels]){
fprintf(stderr, "Failed to allocate memory\n");
return NULL;
}
channels[nchannels]->instance = i;
channels[nchannels]->ident = ident;
return channels[nchannels++];
}
instance* mm_instance(){
instance** new_inst = realloc(instances, (ninstances + 1) * sizeof(instance*));
if(!new_inst){
//TODO free
fprintf(stderr, "Failed to allocate memory\n");
ninstances = 0;
return NULL;
}
instances = new_inst;
instances[ninstances] = calloc(1, sizeof(instance));
if(!instances[ninstances]){
fprintf(stderr, "Failed to allocate memory\n");
return NULL;
}
return instances[ninstances++];
}
instance* mm_instance_find(char* name, uint64_t ident){
size_t u;
backend* b = backend_match(name);
if(!b){
return NULL;
}
for(u = 0; u < ninstances; u++){
if(instances[u]->backend == b && instances[u]->ident == ident){
return instances[u];
}
}
return NULL;
}
int mm_backend_instances(char* name, size_t* ninst, instance*** inst){
backend* b = backend_match(name);
size_t n = 0, u;
//count number of affected instances
for(u = 0; u < ninstances; u++){
if(instances[u]->backend == b){
n++;
}
}
*ninst = n;
*inst = calloc(n, sizeof(instance*));
if(!*inst){
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
n = 0;
for(u = 0; u < ninstances; u++){
if(instances[u]->backend == b){
(*inst)[n] = instances[u];
n++;
}
}
return 0;
}
void instances_free(){
size_t u;
for(u = 0; u < ninstances; u++){
free(instances[u]->name);
instances[u]->name = NULL;
instances[u]->backend = NULL;
free(instances[u]);
instances[u] = NULL;
}
free(instances);
ninstances = 0;
}
void channels_free(){
size_t u;
for(u = 0; u < nchannels; u++){
if(channels[u]->impl){
channels[u]->instance->backend->channel_free(channels[u]);
}
free(channels[u]);
channels[u] = NULL;
}
free(channels);
nchannels = 0;
}
backend* backend_match(char* name){
size_t u;
for(u = 0; u < nbackends; u++){
if(!strcmp(backends[u].name, name)){
return backends + u;
}
}
return NULL;
}
instance* instance_match(char* name){
size_t u;
for(u = 0; u < ninstances; u++){
if(!strcmp(instances[u]->name, name)){
return instances[u];
}
}
return NULL;
}
struct timeval backend_timeout(){
size_t u;
uint32_t res, secs = 1, msecs = 0;
for(u = 0; u < nbackends; u++){
if(backends[u].interval){
res = backends[u].interval();
if((res / 1000) <= secs){
secs = res / 1000;
if((res % 1000) < msecs){
msecs = res % 1000;
}
}
}
}
struct timeval tv = {
secs,
msecs
};
return tv;
}
int mm_backend_register(backend b){
if(!backend_match(b.name)){
backends = realloc(backends, (nbackends + 1) * sizeof(backend));
if(!backends){
fprintf(stderr, "Failed to allocate memory\n");
nbackends = 0;
return 1;
}
backends[nbackends] = b;
nbackends++;
fprintf(stderr, "Registered backend %s\n", b.name);
return 0;
}
return 1;
}
int backends_start(){
int rv = 0;
size_t u;
for(u = 0; u < nbackends; u++){
rv |= backends[u].start();
}
return rv;
}
int backends_stop(){
size_t u;
for(u = 0; u < nbackends; u++){
backends[u].shutdown();
}
free(backends);
nbackends = 0;
return 0;
}
|
