add ws

libs/libwebsockets/win32port/win32helpers/websock-w32.c

@@ -0,0 +1,104 @@
+#define FD_SETSIZE 256
+
+#ifdef __MINGW32__
+#include <winsock2.h>
+#else
+#ifdef __MINGW64__
+#include <winsock2.h>
+#else
+#include <WinSock2.h>
+#endif
+#endif
+
+#include <stdlib.h>
+#include <errno.h>
+#include "websock-w32.h"
+
+PFNWSAPOLL poll = NULL;
+
+INT WSAAPI emulated_poll(LPWSAPOLLFD fdarray, ULONG nfds, INT timeout)
+{
+	fd_set readfds;
+	fd_set writefds;
+	struct timeval tv;
+	struct timeval *ptv = &tv;
+	SOCKET max_socket = 0;
+	ULONG n = 0;
+	int waiting;
+	int pending = 0;
+	WSAPOLLFD * poll_fd = fdarray;
+
+	if (NULL == fdarray) {
+		errno = EFAULT;
+		return -1;
+	}
+
+	FD_ZERO(&readfds);
+	FD_ZERO(&writefds);
+
+	tv.tv_sec = timeout / 1000;
+	tv.tv_usec = (timeout % 1000) * 1000;
+
+	if (timeout < 0)
+		ptv = NULL;
+
+	while (n < nfds) {
+
+		poll_fd->revents = 0;
+
+		if (poll_fd->fd < 0 || !poll_fd->events)
+			goto skip1;
+
+		if (max_socket < poll_fd->fd)
+			max_socket = poll_fd->fd;
+
+		if (poll_fd->events & POLLIN)
+			FD_SET(poll_fd->fd, &readfds);
+
+		if (poll_fd->events & POLLOUT)
+			FD_SET(poll_fd->fd, &writefds);
+skip1:
+		poll_fd++;
+		n++;
+	}
+
+	waiting = select((int)max_socket + 1, &readfds, &writefds, NULL, ptv);
+
+	if (waiting <= 0)
+		return waiting;
+
+	poll_fd = fdarray;
+
+	while (waiting && nfds--) {
+
+		if (!poll_fd->events)
+			goto skip2;
+
+		if (poll_fd->fd <= 0) {
+			poll_fd->revents = POLLNVAL;
+			goto skip2;
+		}
+
+		if (FD_ISSET(poll_fd->fd, &readfds)) {
+
+			/* defer POLLHUP / error detect to false read attempt */
+
+			poll_fd->revents |= POLLIN;
+			waiting--;
+		}
+
+		if (FD_ISSET(poll_fd->fd, &writefds)) {
+
+			poll_fd->revents |= poll_fd->events & POLLOUT;
+			waiting--;
+		}
+
+		if (poll_fd->revents)
+			pending++;
+
+skip2:
+		poll_fd++;
+	}
+
+	return pending;
+}