mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 03:27:31 +00:00
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
#include "syshdrs.h"
|
|
|
|
void
|
|
SelectSetInit(SelectSetPtr const ssp, const double timeout)
|
|
{
|
|
double i;
|
|
long l;
|
|
|
|
/* Inititalize SelectSet, which will clear the fd_set, the
|
|
* timeval, and the maxfd and numfds to 0.
|
|
*/
|
|
memset(ssp, 0, sizeof(SelectSet));
|
|
l = (long) timeout;
|
|
i = (double) l;
|
|
ssp->timeout.tv_sec = l;
|
|
ssp->timeout.tv_usec = (long) ((timeout - i) * 1000000.0);
|
|
} /* SelectSetInit */
|
|
|
|
|
|
|
|
|
|
void
|
|
SelectSetAdd(SelectSetPtr const ssp, const int fd)
|
|
{
|
|
if (fd >= 0) {
|
|
FD_SET(fd, &ssp->fds);
|
|
if (ssp->maxfd < (fd + 1))
|
|
ssp->maxfd = (fd + 1);
|
|
++ssp->numfds;
|
|
}
|
|
} /* SelectSetAdd */
|
|
|
|
|
|
|
|
|
|
void
|
|
SelectSetRemove(SelectSetPtr const ssp, const int fd)
|
|
{
|
|
if ((fd >= 0) && (FD_ISSET(fd, &ssp->fds))) {
|
|
FD_CLR(fd, &ssp->fds);
|
|
/* Note that maxfd is left alone, even if maxfd was
|
|
* this one. That is okay.
|
|
*/
|
|
--ssp->numfds;
|
|
}
|
|
} /* SelectSetRemove */
|
|
|
|
|
|
|
|
int
|
|
SelectW(SelectSetPtr ssp, SelectSetPtr resultssp)
|
|
{
|
|
int rc;
|
|
|
|
do {
|
|
memcpy(resultssp, ssp, sizeof(SelectSet));
|
|
rc = select(resultssp->maxfd, NULL, SELECT_TYPE_ARG234 &resultssp->fds, NULL, SELECT_TYPE_ARG5 &resultssp->timeout);
|
|
} while ((rc < 0) && (errno == EINTR));
|
|
return (rc);
|
|
} /* SelectW */
|
|
|
|
|
|
|
|
int
|
|
SelectR(SelectSetPtr ssp, SelectSetPtr resultssp)
|
|
{
|
|
int rc;
|
|
|
|
do {
|
|
memcpy(resultssp, ssp, sizeof(SelectSet));
|
|
rc = select(resultssp->maxfd, SELECT_TYPE_ARG234 &resultssp->fds, NULL, NULL, SELECT_TYPE_ARG5 &resultssp->timeout);
|
|
} while ((rc < 0) && (errno == EINTR));
|
|
return (rc);
|
|
} /* SelectR */
|