1/*
2 * Copyright (c) 2009 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24
25//
26// kq++ - kqueue/kevent interface
27//
28#ifndef _H_KQPP
29#define _H_KQPP
30
31#include <security_utilities/unix++.h>
32#include <sys/event.h>
33
34namespace Security {
35namespace UnixPlusPlus {
36
37
38class KEvent;
39
40
41class KQueue {
42public:
43	KQueue();
44	virtual ~KQueue();
45
46	unsigned operator () (const KEvent *updates, unsigned updateCount, KEvent *events, unsigned eventCount,
47		const timespec *timeout = NULL);
48	unsigned operator () (KEvent *events, unsigned eventCount, const timespec *timeout = NULL)
49		{ return operator () (NULL, NULL, events, eventCount, timeout); }
50
51	void update(const KEvent &event, unsigned flags = EV_ADD);
52	bool receive(KEvent &event, const timespec *timeout = NULL);
53
54private:
55	int mQueue;
56};
57
58
59class KEvent : public PodWrapper<KEvent, kevent64_s> {
60public:
61	KEvent() { clearPod(); }
62	KEvent(int16_t filt) { clearPod(); this->filter = filt; }
63	KEvent(int16_t filt, uint64_t id, uint32_t ffl = 0)
64//		{ clearPod(); this->ident = id; this->filter = filt; this->fflags = ffl; }
65		{ EV_SET64(this, id, filt, 0, ffl, 0, 0, 0, 0); }
66
67	void addTo(KQueue &kq, unsigned flags = 0)
68		{ this->flags = EV_ADD | flags; kq.update(*this); }
69	void removeFrom(KQueue &kq, unsigned flags = 0)
70		{ this->flags = EV_DELETE | flags; kq.update(*this); }
71	void enable(KQueue &kq, unsigned flags = 0)
72		{ this->flags = EV_ENABLE | flags; kq.update(*this); }
73	void disable(KQueue &kq, unsigned flags = 0)
74		{ this->flags = EV_DISABLE | flags; kq.update(*this); }
75};
76
77
78namespace Event {
79
80
81class Vnode : public KEvent {
82public:
83	Vnode() : KEvent(EVFILT_VNODE) { }
84	Vnode(int fd, uint32_t flags) : KEvent(EVFILT_VNODE, fd, flags) { }
85
86	int fd() const { return (int)this->ident; }
87};
88
89} // namespace Event
90
91
92} // end namespace UnixPlusPlus
93} // end namespace Security
94
95#endif //_H_KQPP
96