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poll() emulation for BeOS, and maybe MinGW.

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

7
configure vendored
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@ -548,6 +548,7 @@ HAVE_LIST='
sdl
sdl_video_size
soundcard_h
sys_poll_h
sys_soundcard_h
threads
w32threads
@ -1430,6 +1431,12 @@ check_func inet_aton
check_func localtime_r
enabled zlib && check_lib zlib.h zlibVersion -lz || zlib="no"
# ffserver uses poll(),
# if it's not found we can emulate it using select().
if enabled ffserver; then
check_header sys/poll.h
fi
# check for some common methods of building with pthread support
# do this before the optional library checks as some of them require pthreads
if enabled pthreads; then

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@ -25,7 +25,9 @@
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif
#include <errno.h>
#include <sys/time.h>
#undef time //needed because HAVE_AV_CONFIG_H is defined on top

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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 */

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@ -32,6 +32,7 @@
* - floatf() (OS/2)
* - strcasecmp() (OS/2)
* - closesocket()
* - poll() (BeOS)
*/
#if defined(__BEOS__) || defined(__INNOTEK_LIBC__)
@ -78,4 +79,31 @@ static inline int strcasecmp(const char* s1, const char* s2) { return stricmp(s1
#define closesocket close
#endif
#ifndef HAVE_SYS_POLL_H
typedef unsigned long nfds_t;
struct pollfd {
int fd;
short events; /* events to look for */
short revents; /* events that occured */
};
/* events & revents */
#define POLLIN 0x0001 /* any readable data available */
#define POLLOUT 0x0002 /* file descriptor is writeable */
#define POLLRDNORM POLLIN
#define POLLWRNORM POLLOUT
#define POLLRDBAND 0x0008 /* priority readable data */
#define POLLWRBAND 0x0010 /* priority data can be written */
#define POLLPRI 0x0020 /* high priority readable data */
/* revents only */
#define POLLERR 0x0004 /* errors pending */
#define POLLHUP 0x0080 /* disconnected */
#define POLLNVAL 0x1000 /* invalid file descriptor */
extern int poll(struct pollfd *fds, nfds_t numfds, int timeout);
#endif /* HAVE_SYS_POLL_H */
#endif /* _OS_SUPPORT_H */