blob: a0697f80f6888ef72ad4150106eb9d570e0ef83b (
plain) (
blame)
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
|
#include "signal.h"
#include <sys/eventfd.h>
#include <poll.h>
#include <inttypes.h>
#include <errno.h>
#include <unistd.h>
int signal_new()
{
return eventfd( 0, EFD_NONBLOCK );
}
int signal_newBlocking()
{
return eventfd( 0, 0 );
}
int signal_call(int signalFd)
{
if ( signalFd < 0 ) return 0;
static uint64_t one = 1;
return write( signalFd, &one, sizeof one ) == sizeof one;
}
int signal_wait(int signalFd, int timeoutMs)
{
struct pollfd ps = {
.fd = signalFd,
.events = POLLIN
};
int ret = poll( &ps, 1, timeoutMs );
if ( ret == 0 ) return SIGNAL_TIMEOUT;
if ( ret == -1 ) return SIGNAL_ERROR;
if ( ps.revents & ( POLLERR | POLLNVAL ) ) return SIGNAL_ERROR;
return signal_clear( signalFd );
}
int signal_clear(int signalFd)
{
uint64_t ret;
if ( read( signalFd, &ret, sizeof ret ) != sizeof ret ) {
if ( errno == EAGAIN ) return 0;
return SIGNAL_ERROR;
}
return (int)ret;
}
void signal_close(int signalFd)
{
close( signalFd );
}
|