--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/unix/native/libnio/ch/PollArrayWrapper.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jlong.h"
+#include "sun_nio_ch_PollArrayWrapper.h"
+#include <poll.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#define RESTARTABLE(_cmd, _result) do { \
+  do { \
+    _result = _cmd; \
+  } while((_result == -1) && (errno == EINTR)); \
+} while(0)
+
+static int
+ipoll(struct pollfd fds[], unsigned int nfds, int timeout)
+{
+    jlong start, now;
+    int remaining = timeout;
+    struct timeval t;
+    int diff;
+
+    gettimeofday(&t, NULL);
+    start = t.tv_sec * 1000 + t.tv_usec / 1000;
+
+    for (;;) {
+        int res = poll(fds, nfds, remaining);
+        if (res < 0 && errno == EINTR) {
+            if (remaining >= 0) {
+                gettimeofday(&t, NULL);
+                now = t.tv_sec * 1000 + t.tv_usec / 1000;
+                diff = now - start;
+                remaining -= diff;
+                if (diff < 0 || remaining <= 0) {
+                    return 0;
+                }
+                start = now;
+            }
+        } else {
+            return res;
+        }
+    }
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_ch_PollArrayWrapper_poll0(JNIEnv *env, jobject this,
+                                       jlong address, jint numfds,
+                                       jlong timeout)
+{
+    struct pollfd *a;
+    int err = 0;
+
+    a = (struct pollfd *) jlong_to_ptr(address);
+
+    if (timeout <= 0) {           /* Indefinite or no wait */
+        RESTARTABLE (poll(a, numfds, timeout), err);
+    } else {                     /* Bounded wait; bounded restarts */
+        err = ipoll(a, numfds, timeout);
+    }
+
+    if (err < 0) {
+        JNU_ThrowIOExceptionWithLastError(env, "Poll failed");
+    }
+    return (jint)err;
+}
+
+JNIEXPORT void JNICALL
+Java_sun_nio_ch_PollArrayWrapper_interrupt(JNIEnv *env, jobject this, jint fd)
+{
+    int fakebuf[1];
+    fakebuf[0] = 1;
+    if (write(fd, fakebuf, 1) < 0) {
+         JNU_ThrowIOExceptionWithLastError(env,
+                                          "Write to interrupt fd failed");
+    }
+}