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
|
#define EXTUNIX_WANT_WAIT4
#include "config.h"
#if defined(EXTUNIX_HAVE_WAIT4)
static value alloc_wait4_return(int pid, int status, struct rusage *rusage) {
CAMLparam0();
CAMLlocal3(res, st, ru);
if (pid == 0)
status = 0;
if (WIFEXITED(status)) {
st = caml_alloc_small(1, 0);
Store_field(st, 0, Val_int(WEXITSTATUS(status)));
} else if (WIFSTOPPED(status)) {
st = caml_alloc_small(1, 2);
Store_field(st, 0,
Val_int(caml_rev_convert_signal_number(WSTOPSIG(status))));
} else {
st = caml_alloc_small(1, 1);
Store_field(st, 0,
Val_int(caml_rev_convert_signal_number(WTERMSIG(status))));
}
ru = caml_alloc(3, 0);
Store_field(ru, 0,
caml_copy_double((double)rusage->ru_utime.tv_sec +
(double)rusage->ru_utime.tv_usec / 1e6));
Store_field(ru, 1,
caml_copy_double((double)rusage->ru_stime.tv_sec +
(double)rusage->ru_stime.tv_usec / 1e6));
Store_field(ru, 2, caml_copy_int64(rusage->ru_maxrss));
res = caml_alloc_tuple(3);
Store_field(res, 0, Val_int(pid));
Store_field(res, 1, st);
Store_field(res, 2, ru);
CAMLreturn(res);
}
static const int wait_flag_table[] = {WNOHANG, WUNTRACED};
CAMLprim value caml_extunix_wait4(value vwait_flags, value vpid_req) {
CAMLparam2(vwait_flags, vpid_req);
int pid, wstatus, options;
struct rusage rusage;
int pid_req = Int_val(vpid_req);
options = caml_convert_flag_list(vwait_flags, wait_flag_table);
caml_enter_blocking_section();
pid = wait4(pid_req, &wstatus, options, &rusage);
caml_leave_blocking_section();
if (pid == -1)
caml_uerror("wait4", Nothing);
CAMLreturn(alloc_wait4_return(pid, wstatus, &rusage));
}
#endif
|
