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poll() emulation for BeOS, and maybe MinGW.

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Originally committed as revision 7987 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
François Revol
2007-02-15 07:44:10 +00:00
parent befa3397c5
commit b0c858d834
4 changed files with 103 additions and 0 deletions
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66
libavformat/os_support.c
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@ -35,6 +35,9 @@
#include <sys/time.h>
#endif
#include <time.h>
#ifndef HAVE_SYS_POLL_H
#include <sys/select.h>
#endif
/**
* gets the current time in micro seconds.
@ -94,3 +97,66 @@ done:
return 1;
}
#endif /* !defined(HAVE_INET_ATON) && defined(CONFIG_NETWORK) */
#ifndef HAVE_SYS_POLL_H
int poll(struct pollfd *fds, nfds_t numfds, int timeout)
{
fd_set read_set;
fd_set write_set;
fd_set exception_set;
nfds_t i;
int n;
int rc;
FD_ZERO(&read_set);
FD_ZERO(&write_set);
FD_ZERO(&exception_set);
n = -1;
for(i = 0; i < numfds; i++) {
if (fds[i].fd < 0)
continue;
if (fds[i].fd >= FD_SETSIZE) {
errno = EINVAL;
return -1;
}
if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set);
if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set);
if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set);
if (fds[i].fd > n)
n = fds[i].fd;
};
if (n == -1)
/* Hey!? Nothing to poll, in fact!!! */
return 0;
if (timeout < 0)
rc = select(n+1, &read_set, &write_set, &exception_set, NULL);
else {
struct timeval tv;
tv.tv_sec = timeout / 1000;
tv.tv_usec = 1000 * (timeout % 1000);
rc = select(n+1, &read_set, &write_set, &exception_set, &tv);
};
if (rc < 0)
return rc;
for(i = 0; i < (nfds_t) n; i++) {
fds[i].revents = 0;
if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN;
if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT;
if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR;
};
return rc;
}
#endif /* HAVE_SYS_POLL_H */