OSX/libsecurity_utilities/lib/kq++.cpp

   1 /*
   2  * Copyright (c) 2009,2011 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 #include <security_utilities/kq++.h>
  29
  30 namespace Security {
  31 namespace UnixPlusPlus {
  32
  33
  34 KQueue::KQueue()
  35 {
  36         UnixError::check(mQueue = ::kqueue());
  37 }
  38
  39 KQueue::~KQueue()
  40 {
  41         UnixError::check(::close(mQueue));
  42 }
  43
  44
  45 unsigned KQueue::operator () (const KEvent *updates, unsigned updateCount,
  46         KEvent *events, unsigned eventCount, const timespec *timeout)
  47 {
  48         int rc = ::kevent64(mQueue, updates, updateCount, events, eventCount, 0, timeout);
  49         UnixError::check(rc);
  50         assert(rc >= 0);
  51         return rc;
  52 }
  53
  54
  55 void KQueue::update(const KEvent &event, unsigned flags)
  56 {
  57         KEvent ev = event;
  58         ev.flags = flags;
  59         (*this)(&event, 1, NULL, NULL);
  60 }
  61
  62 bool KQueue::receive(KEvent &event, const timespec *timeout)
  63 {
  64         return (*this)(&event, 1, timeout) > 0;
  65 }
  66
  67
  68 } // end namespace UnixPlusPlus
  69 } // end namespace Security