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; #ifdef __MINGW32__ if (numfds >= FD_SETSIZE) { errno = EINVAL; return -1; } #endif 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; #ifndef __MINGW32__ if (fds[i].fd >= FD_SETSIZE) { errno = EINVAL; return -1; } #endif 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; }