Merged signals-merge branch into trunk with the following changes:

* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
  handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
  support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
  of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
  [set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/util/KernelReferenceable.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2011, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_UTIL_KERNEL_REFERENCEABLE_H
+#define _KERNEL_UTIL_KERNEL_REFERENCEABLE_H
+
+
+#include <Referenceable.h>
+
+#include <heap.h>
+
+
+namespace BKernel {
+
+
+struct KernelReferenceable : BReferenceable, DeferredDeletable {
+protected:
+	virtual	void				LastReferenceReleased();
+};
+
+
+}	// namespace BKernel
+
+
+using BKernel::KernelReferenceable;
+
+
+#endif	/* _KERNEL_UTIL_KERNEL_REFERENCEABLE_H */