1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
77 int remaining = a.dp_timeout;
78 struct timeval t;
79 int diff;
80
81 gettimeofday(&t, NULL);
82 start = t.tv_sec * 1000 + t.tv_usec / 1000;
83
84 for (;;) {
85 /* poll(7d) ioctl does not return remaining count */
86 int res = ioctl(wfd, dpctl, &a);
87 if (res < 0 && errno == EINTR) {
88 if (remaining >= 0) {
89 gettimeofday(&t, NULL);
90 now = t.tv_sec * 1000 + t.tv_usec / 1000;
91 diff = now - start;
92 remaining -= diff;
93 if (diff < 0 || remaining <= 0) {
94 return 0;
95 }
96 start = now;
97 }
98 } else {
99 return res;
100 }
101 }
102 }
103
104 JNIEXPORT jint JNICALL
105 Java_sun_nio_ch_DevPollArrayWrapper_init(JNIEnv *env, jobject this)
106 {
107 int wfd = open("/dev/poll", O_RDWR);
108 if (wfd < 0) {
109 JNU_ThrowIOExceptionWithLastError(env, "Error opening driver");
110 return -1;
111 }
112 return wfd;
113 }
114
115 JNIEXPORT void JNICALL
116 Java_sun_nio_ch_DevPollArrayWrapper_register(JNIEnv *env, jobject this,
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1 /*
2 * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
77 int remaining = a.dp_timeout;
78 struct timeval t;
79 int diff;
80
81 gettimeofday(&t, NULL);
82 start = t.tv_sec * 1000 + t.tv_usec / 1000;
83
84 for (;;) {
85 /* poll(7d) ioctl does not return remaining count */
86 int res = ioctl(wfd, dpctl, &a);
87 if (res < 0 && errno == EINTR) {
88 if (remaining >= 0) {
89 gettimeofday(&t, NULL);
90 now = t.tv_sec * 1000 + t.tv_usec / 1000;
91 diff = now - start;
92 remaining -= diff;
93 if (diff < 0 || remaining <= 0) {
94 return 0;
95 }
96 start = now;
97 a.dp_timeout = remaining;
98 }
99 } else {
100 return res;
101 }
102 }
103 }
104
105 JNIEXPORT jint JNICALL
106 Java_sun_nio_ch_DevPollArrayWrapper_init(JNIEnv *env, jobject this)
107 {
108 int wfd = open("/dev/poll", O_RDWR);
109 if (wfd < 0) {
110 JNU_ThrowIOExceptionWithLastError(env, "Error opening driver");
111 return -1;
112 }
113 return wfd;
114 }
115
116 JNIEXPORT void JNICALL
117 Java_sun_nio_ch_DevPollArrayWrapper_register(JNIEnv *env, jobject this,
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