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
|
/*-------------------------------------------------------------------------
*
* noblock.c
* set a file descriptor as blocking or non-blocking
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/port/noblock.c
*
*-------------------------------------------------------------------------
*/
#include "c.h"
#include <fcntl.h>
/*
* Put socket into nonblock mode.
* Returns true on success, false on failure.
*/
bool
pg_set_noblock(pgsocket sock)
{
#if !defined(WIN32)
int flags;
flags = fcntl(sock, F_GETFL);
if (flags < 0)
return false;
if (fcntl(sock, F_SETFL, (flags | O_NONBLOCK)) == -1)
return false;
return true;
#else
unsigned long ioctlsocket_ret = 1;
/* Returns non-0 on failure, while fcntl() returns -1 on failure */
return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
#endif
}
/*
* Put socket into blocking mode.
* Returns true on success, false on failure.
*/
bool
pg_set_block(pgsocket sock)
{
#if !defined(WIN32)
int flags;
flags = fcntl(sock, F_GETFL);
if (flags < 0)
return false;
if (fcntl(sock, F_SETFL, (flags & ~O_NONBLOCK)) == -1)
return false;
return true;
#else
unsigned long ioctlsocket_ret = 0;
/* Returns non-0 on failure, while fcntl() returns -1 on failure */
return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
#endif
}
|
