1 files changed, 148 insertions, 0 deletions
diff --git a/src/common/fakepoll.c b/src/common/fakepoll.c
new file mode 100644
index 0000000..381ceea
--- /dev/null
+++ b/src/common/fakepoll.c
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+/* $Id: fakepoll.c 2423 2010-03-13 07:09:49Z aturner $ */
+/*
+ * fakepoll.c
+ *
+ * On systems where 'poll' doesn't exist, fake it with 'select'.
+ *
+ * Copyright (c) 2001-2003, Nick Mathewson <[email protected]>
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ *   * Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following disclaimer
+ *   in the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ *   * Neither the names of the copyright owners nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "defines.h"
+#include "common.h"
+
+/* prevents ISO C error */
+static void FAKEPOLL(int stop)
+{ 
+    if (! stop)
+        FAKEPOLL(1); 
+    return;
+
+} 
+
+#ifdef USE_FAKE_POLL
+#include <sys/types.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#if _MSC_VER > 1300
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#elif defined(_MSC_VER)
+#include <winsock.h>
+#endif
+
+/* by default, windows handles only 64 fd's */
+#if defined(MS_WINDOWS) && !defined(FD_SETSIZE)
+#define FD_SETSIZE MAXCONNECTIONS
+#endif
+
+#include "util.h"
+
+/**
+ * custom version of poll() using select() in the backend
+ * only used if you don't actually have poll on your system.
+ */
+int
+poll(struct pollfd *ufds, unsigned int nfds, int timeout)
+{
+    int idx, maxfd, fd;
+    int r;
+#ifdef MS_WINDOWS
+    int any_fds_set = 0;
+#endif
+    fd_set readfds, writefds, exceptfds;
+#ifdef USING_FAKE_TIMEVAL
+#undef timeval
+#undef tv_sec
+#undef tv_usec
+#endif
+    struct timeval _timeout;
+    _timeout.tv_sec = timeout / 1000;
+    _timeout.tv_usec = (timeout % 1000) * 1000;
+    FD_ZERO(&readfds);
+    FD_ZERO(&writefds);
+    FD_ZERO(&exceptfds);
+
+    maxfd = -1;
+    for (idx = 0; idx < nfds; ++idx) {
+        ufds[idx].revents = 0;
+        fd = ufds[idx].fd;
+        if (fd > maxfd) {
+            maxfd = fd;
+#ifdef MS_WINDOWS
+            any_fds_set = 1;
+#endif
+        }
+        if (ufds[idx].events & POLLIN)
+            FD_SET(fd, &readfds);
+        if (ufds[idx].events & POLLOUT)
+            FD_SET(fd, &writefds);
+        FD_SET(fd, &exceptfds);
+    }
+#ifdef MS_WINDOWS
+    if (!any_fds_set) {
+        Sleep(timeout);
+        return 0;
+    }
+#endif
+    r = select(maxfd + 1, &readfds, &writefds, &exceptfds,
+               timeout == -1 ? NULL : &_timeout);
+    if (r <= 0)
+        return r;
+    r = 0;
+    for (idx = 0; idx < nfds; ++idx) {
+        fd = ufds[idx].fd;
+        if (FD_ISSET(fd, &readfds))
+            ufds[idx].revents |= POLLIN;
+        if (FD_ISSET(fd, &writefds))
+            ufds[idx].revents |= POLLOUT;
+        if (FD_ISSET(fd, &exceptfds))
+            ufds[idx].revents |= POLLERR;
+        if (ufds[idx].revents)
+            ++r;
+    }
+    return r;
+}
+#endif
+
+/*
+ Local Variables:
+ mode:c
+ indent-tabs-mode:nil
+ c-basic-offset:4
+ End:
+*/
+
+