mirror of
https://github.com/reactos/reactos.git
synced 2024-12-27 17:44:45 +00:00
109 lines
1.8 KiB
C
109 lines
1.8 KiB
C
|
#include "syshdrs.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return zero if the operation timed-out or erred-out, otherwise non-zero.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
SWaitUntilReadyForReading(const int sfd, const int tlen)
|
||
|
|
{
|
||
|
|
fd_set ss, ss2;
|
||
|
|
struct timeval tv;
|
||
|
|
int result;
|
||
|
|
int tleft;
|
||
|
|
time_t now, done;
|
||
|
|
|
||
|
|
if (sfd < 0) {
|
||
|
|
errno = EBADF;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
time(&now);
|
||
|
|
done = now + tlen;
|
||
|
|
tleft = tlen;
|
||
|
|
|
||
|
|
forever {
|
||
|
|
FD_ZERO(&ss);
|
||
|
|
FD_SET(sfd, &ss);
|
||
|
|
ss2 = ss;
|
||
|
|
tv.tv_sec = tleft;
|
||
|
|
tv.tv_usec = 0;
|
||
|
|
result = select(sfd + 1, SELECT_TYPE_ARG234 &ss, NULL, SELECT_TYPE_ARG234 &ss2, &tv);
|
||
|
|
if (result == 1) {
|
||
|
|
/* ready */
|
||
|
|
return (1);
|
||
|
|
} else if (result < 0) {
|
||
|
|
if (errno != EINTR) {
|
||
|
|
/* error */
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
/* try again */
|
||
|
|
time(&now);
|
||
|
|
if (now > done) {
|
||
|
|
/* timed-out */
|
||
|
|
errno = ETIMEDOUT;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
tleft = (int) (done - now);
|
||
|
|
} else {
|
||
|
|
/* timed-out */
|
||
|
|
errno = ETIMEDOUT;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} /* SWaitUntilReadyForReading */
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return zero if the operation timed-out or erred-out, otherwise non-zero.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
SWaitUntilReadyForWriting(const int sfd, const int tlen)
|
||
|
|
{
|
||
|
|
fd_set ss, ss2;
|
||
|
|
struct timeval tv;
|
||
|
|
int result;
|
||
|
|
int tleft;
|
||
|
|
time_t now, done;
|
||
|
|
|
||
|
|
if (sfd < 0) {
|
||
|
|
errno = EBADF;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
time(&now);
|
||
|
|
done = now + tlen;
|
||
|
|
tleft = tlen;
|
||
|
|
|
||
|
|
forever {
|
||
|
|
FD_ZERO(&ss);
|
||
|
|
FD_SET(sfd, &ss);
|
||
|
|
ss2 = ss;
|
||
|
|
tv.tv_sec = tleft;
|
||
|
|
tv.tv_usec = 0;
|
||
|
|
result = select(sfd + 1, NULL, SELECT_TYPE_ARG234 &ss, SELECT_TYPE_ARG234 &ss2, &tv);
|
||
|
|
if (result == 1) {
|
||
|
|
/* ready */
|
||
|
|
return (1);
|
||
|
|
} else if (result < 0) {
|
||
|
|
if (errno != EINTR) {
|
||
|
|
/* error */
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
/* try again */
|
||
|
|
time(&now);
|
||
|
|
if (now > done) {
|
||
|
|
/* timed-out */
|
||
|
|
errno = ETIMEDOUT;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
tleft = (int) (done - now);
|
||
|
|
} else {
|
||
|
|
/* timed-out */
|
||
|
|
errno = ETIMEDOUT;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} /* SWaitUntilReadyForWriting */
|