forked from Mirrors/freeswitch
105 lines
1.6 KiB
C
105 lines
1.6 KiB
C
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#define FD_SETSIZE 256
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#ifdef __MINGW32__
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#include <winsock2.h>
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#else
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#ifdef __MINGW64__
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#include <winsock2.h>
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#else
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#include <WinSock2.h>
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#endif
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#endif
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#include <stdlib.h>
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#include <errno.h>
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#include "websock-w32.h"
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PFNWSAPOLL poll = NULL;
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INT WSAAPI emulated_poll(LPWSAPOLLFD fdarray, ULONG nfds, INT timeout)
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{
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fd_set readfds;
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fd_set writefds;
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struct timeval tv;
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struct timeval *ptv = &tv;
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SOCKET max_socket = 0;
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ULONG n = 0;
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int waiting;
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int pending = 0;
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WSAPOLLFD * poll_fd = fdarray;
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if (NULL == fdarray) {
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errno = EFAULT;
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return -1;
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}
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FD_ZERO(&readfds);
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FD_ZERO(&writefds);
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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if (timeout < 0)
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ptv = NULL;
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while (n < nfds) {
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poll_fd->revents = 0;
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if (poll_fd->fd < 0 || !poll_fd->events)
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goto skip1;
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if (max_socket < poll_fd->fd)
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max_socket = poll_fd->fd;
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if (poll_fd->events & POLLIN)
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FD_SET(poll_fd->fd, &readfds);
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if (poll_fd->events & POLLOUT)
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FD_SET(poll_fd->fd, &writefds);
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skip1:
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poll_fd++;
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n++;
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}
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waiting = select((int)max_socket + 1, &readfds, &writefds, NULL, ptv);
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if (waiting <= 0)
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return waiting;
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poll_fd = fdarray;
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while (waiting && nfds--) {
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if (!poll_fd->events)
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goto skip2;
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if (poll_fd->fd <= 0) {
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poll_fd->revents = POLLNVAL;
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goto skip2;
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}
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if (FD_ISSET(poll_fd->fd, &readfds)) {
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/* defer POLLHUP / error detect to false read attempt */
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poll_fd->revents |= POLLIN;
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waiting--;
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}
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if (FD_ISSET(poll_fd->fd, &writefds)) {
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poll_fd->revents |= poll_fd->events & POLLOUT;
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waiting--;
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}
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if (poll_fd->revents)
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pending++;
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skip2:
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poll_fd++;
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}
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return pending;
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}
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