Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_utilities / lib / kq++.cpp

diff --git a/Security/libsecurity_utilities/lib/kq++.cpp b/Security/libsecurity_utilities/lib/kq++.cpp
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+++ b/Security/libsecurity_utilities/lib/kq++.cpp
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+/*
+ * Copyright (c) 2009,2011 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+//
+// kq++ - kqueue/kevent interface
+//
+#include <security_utilities/kq++.h>
+
+namespace Security {
+namespace UnixPlusPlus {
+
+
+KQueue::KQueue()
+{
+       UnixError::check(mQueue = ::kqueue());
+}
+
+KQueue::~KQueue()
+{
+       UnixError::check(::close(mQueue));
+}
+
+
+unsigned KQueue::operator () (const KEvent *updates, unsigned updateCount,
+       KEvent *events, unsigned eventCount, const timespec *timeout)
+{
+       int rc = ::kevent64(mQueue, updates, updateCount, events, eventCount, 0, timeout);
+       UnixError::check(rc);
+       assert(rc >= 0);
+       return rc;
+}
+
+
+void KQueue::update(const KEvent &event, unsigned flags)
+{
+       KEvent ev = event;
+       ev.flags = flags;
+       (*this)(&event, 1, NULL, NULL);
+}
+
+bool KQueue::receive(KEvent &event, const timespec *timeout)
+{
+       return (*this)(&event, 1, timeout) > 0;
+}
+
+
+} // end namespace UnixPlusPlus
+} // end namespace Security