1 /*
2 * Copyright (c) 2008, 2013, 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
42 * void *ptr;
43 * int fd;
44 * __uint32_t u32;
45 * __uint64_t u64;
46 * } epoll_data_t;
47 *
48 * struct epoll_event {
49 * __uint32_t events;
50 * epoll_data_t data;
51 * }
52 */
53 private static final int SIZEOF_EPOLLEVENT = eventSize();
54 private static final int OFFSETOF_EVENTS = eventsOffset();
55 private static final int OFFSETOF_FD = dataOffset();
56
57 // opcodes
58 static final int EPOLL_CTL_ADD = 1;
59 static final int EPOLL_CTL_DEL = 2;
60 static final int EPOLL_CTL_MOD = 3;
61
62 // flags
63 static final int EPOLLONESHOT = (1 << 30);
64
65 /**
66 * Allocates a poll array to handle up to {@code count} events.
67 */
68 static long allocatePollArray(int count) {
69 return unsafe.allocateMemory(count * SIZEOF_EPOLLEVENT);
70 }
71
72 /**
73 * Free a poll array
74 */
75 static void freePollArray(long address) {
76 unsafe.freeMemory(address);
77 }
78
79 /**
80 * Returns event[i];
81 */
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1 /*
2 * Copyright (c) 2008, 2018, 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
42 * void *ptr;
43 * int fd;
44 * __uint32_t u32;
45 * __uint64_t u64;
46 * } epoll_data_t;
47 *
48 * struct epoll_event {
49 * __uint32_t events;
50 * epoll_data_t data;
51 * }
52 */
53 private static final int SIZEOF_EPOLLEVENT = eventSize();
54 private static final int OFFSETOF_EVENTS = eventsOffset();
55 private static final int OFFSETOF_FD = dataOffset();
56
57 // opcodes
58 static final int EPOLL_CTL_ADD = 1;
59 static final int EPOLL_CTL_DEL = 2;
60 static final int EPOLL_CTL_MOD = 3;
61
62 // events
63 static final int EPOLLIN = 0x1;
64 static final int EPOLLOUT = 0x4;
65
66 // flags
67 static final int EPOLLONESHOT = (1 << 30);
68
69 /**
70 * Allocates a poll array to handle up to {@code count} events.
71 */
72 static long allocatePollArray(int count) {
73 return unsafe.allocateMemory(count * SIZEOF_EPOLLEVENT);
74 }
75
76 /**
77 * Free a poll array
78 */
79 static void freePollArray(long address) {
80 unsafe.freeMemory(address);
81 }
82
83 /**
84 * Returns event[i];
85 */
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