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
|
// https://github.com/lewissbaker/cppcoro#taskt
#include <time.h>
#include <stdio.h>
#define i_static
#include <stc/cstr.h>
#include <stc/coroutine.h>
cco_task_struct(file_read,
const char* path;
cstr line;
FILE* fp;
cco_timer tm;
);
int file_read(struct file_read* co, cco_runtime* rt)
{
cco_routine (co) {
co->fp = fopen(co->path, "r");
co->line = cstr_null;
while (true) {
// emulate async io: await 10ms per line
cco_await_timer(&co->tm, 0.010);
if (!cstr_getline(&co->line, co->fp))
break;
cco_yield();
}
cco_final:
fclose(co->fp);
cstr_drop(&co->line);
puts("done file_read");
}
return 0;
}
cco_task_struct(count_line,
cstr path;
struct file_read reader;
int lineCount;
);
int count_line(struct count_line* co, cco_runtime* rt)
{
cco_routine (co) {
co->reader.cco_func = file_read;
co->reader.path = cstr_str(&co->path);
while (true)
{
// await for next CCO_YIELD (or CCO_DONE) in file_read()
cco_await_task(&co->reader, rt, CCO_YIELD);
if (rt->result == CCO_DONE) break;
co->lineCount += 1;
cco_yield();
}
cco_final:
cstr_drop(&co->path);
puts("done count_line");
}
return 0;
}
int main(void)
{
// Creates a new task
struct count_line countTask = {
.cco_func = count_line,
.path = cstr_from(__FILE__),
};
// Execute coroutine as top-level blocking
int loop = 0;
cco_blocking_task(&countTask) { ++loop; }
printf("line count = %d\n", countTask.lineCount);
printf("exec count = %d\n", loop);
}
|
