libsecurity_utilities/lib/kq++.h

   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
  34 namespace Security {
  35 namespace UnixPlusPlus {
  36
  37
  38 class KEvent;
  39
  40
  41 class KQueue {
  42 public:
  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
  54 private:
  55         int mQueue;
  56 };
  57
  58
  59 class KEvent : public PodWrapper<KEvent, kevent64_s> {
  60 public:
  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
  78 namespace Event {
  79
  80
  81 class Vnode : public KEvent {
  82 public:
  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