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cel / foostudio



Commit fdc9644582b3e2b875598b772c5bdda6c74ef9e5

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Initial commit

Charles Lehner committed on 10/14/2016, 5:19:02 AM

Files changed

Makefileadded
studio.cadded
tune.cadded
tune.hadded
MakefileView
@@ -1,0 +1,14 @@
1 …+CFLAGS = -std=c99 -fPIC
2 …+LDLIBS = -ldl -lm
3 …+
4 …+all: studio tune.so
5 …+
6 …+studio: studio.c tune.h
7 …+ $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LDLIBS)
8 …+
9 …+tune.so : tune.c tune.h
10 …+ $(CC) $(CFLAGS) -shared $(LDFLAGS) -o $@ $< $(LDLIBS)
11 …+
12 …+clean:
13 …+ $(RM) *.o *.so studio
14 …+
studio.cView
@@ -1,0 +1,75 @@
1 …+#define _DEFAULT_SOURCE
2 …+#include <dlfcn.h>
3 …+#include <err.h>
4 …+#include <stdbool.h>
5 …+#include <stdio.h>
6 …+#include <sys/stat.h>
7 …+#include <sys/types.h>
8 …+#include <unistd.h>
9 …+#include "tune.h"
10 …+
11 …+struct tune_dl {
12 …+ void *handle;
13 …+ ino_t inode;
14 …+ struct tune *tune;
15 …+};
16 …+
17 …+static int tune_dl_load(struct tune_dl *dl, const char *libfname)
18 …+{
19 …+ struct stat st;
20 …+ if (stat(libfname, &st) < 0) {
21 …+ warn("stat");
22 …+ return -1;
23 …+ }
24 …+ if (dl->inode == st.st_ino) {
25 …+ // file unchanged
26 …+ return 0;
27 …+ }
28 …+ // reload the library
29 …+ if (dl->handle) {
30 …+ dlclose(dl->handle);
31 …+ dl->inode = 0;
32 …+ }
33 …+ dl->handle = dlopen(libfname, RTLD_NOW);
34 …+ if (dl->handle == NULL) {
35 …+ // warnx("dlopen: %s", dlerror());
36 …+ return 0;
37 …+ }
38 …+ dl->tune = dlsym(dl->handle, "TUNE");
39 …+ if (dl->tune == NULL) {
40 …+ warn("dlsym");
41 …+ dlclose(dl->handle);
42 …+ return 0;
43 …+ }
44 …+ dl->inode = st.st_ino;
45 …+ if (dl->tune->reload) {
46 …+ dl->tune->reload(dl->tune);
47 …+ }
48 …+ return 0;
49 …+}
50 …+
51 …+int main(int argc, char *argv[])
52 …+{
53 …+ struct tune_dl dl = {0};
54 …+ const char *fname = "./tune.so";
55 …+ if (tune_dl_load(&dl, fname) < 0) {
56 …+ return 1;
57 …+ }
58 …+ if (dl.tune->init) {
59 …+ dl.tune->init(dl.tune);
60 …+ }
61 …+ int t = 0;
62 …+ while (1) {
63 …+ (void) tune_dl_load(&dl, fname);
64 …+ if (dl.handle && dl.tune->play) {
65 …+ double sample = dl.tune->play(dl.tune, t);
66 …+ printf("%d %f\n", t, sample);
67 …+ }
68 …+ (void) tune_dl_load(&dl, fname);
69 …+ usleep(100000);
70 …+ t++;
71 …+ }
72 …+ if (dl.tune->deinit) {
73 …+ dl.tune->deinit(dl.tune);
74 …+ }
75 …+}
tune.cView
@@ -1,0 +1,26 @@
1 …+#include <math.h>
2 …+#include "tune.h"
3 …+
4 …+static void tune_init(struct tune *tune)
5 …+{
6 …+}
7 …+
8 …+static void tune_reload(struct tune *tune)
9 …+{
10 …+}
11 …+
12 …+static double tune_play(struct tune *tune, int time)
13 …+{
14 …+ return sin(time);
15 …+}
16 …+
17 …+static void tune_deinit(struct tune *tune)
18 …+{
19 …+}
20 …+
21 …+const struct tune TUNE = {
22 …+ .init = tune_init,
23 …+ .reload = tune_reload,
24 …+ .play = tune_play,
25 …+ .deinit = tune_deinit,
26 …+};
tune.hView
@@ -1,0 +1,10 @@
1 …+#pragma once
2 …+
3 …+struct tune {
4 …+ void (*init)(struct tune *);
5 …+ void (*deinit)(struct tune *);
6 …+ void (*reload)(struct tune *);
7 …+ double (*play)(struct tune *, int time);
8 …+};
9 …+
10 …+extern const struct tune TUNE;

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