Cleaned up ANSTO code to merge with sinqdev.sics

This is our new RELEASE-4_0 branch which was taken from ansto/93d9a7c
Conflicts:
	.gitignore
	SICSmain.c
	asynnet.c
	confvirtualmot.c
	counter.c
	devexec.c
	drive.c
	event.h
	exebuf.c
	exeman.c
	histmem.c
	interface.h
	motor.c
	motorlist.c
	motorsec.c
	multicounter.c
	napi.c
	napi.h
	napi4.c
	network.c
	nwatch.c
	nxscript.c
	nxxml.c
	nxxml.h
	ofac.c
	reflist.c
	scan.c
	sicshipadaba.c
	sicsobj.c
	site_ansto/docs/Copyright.txt
	site_ansto/instrument/lyrebird/config/tasmad/sicscommon/nxsupport.tcl
	site_ansto/instrument/lyrebird/config/tasmad/taspub_sics/tasscript.tcl
	statusfile.c
	tasdrive.c
	tasub.c
	tasub.h
	tasublib.c
	tasublib.h

messagepipe.h

@@ -0,0 +1,82 @@
+/**
+ * An implementation for a message pipe system as described in
+ * 
+ * http://eventuallyconsistent.net/2013/08/14/messaging-as-a-programming-model-part-2/
+ *
+ * A message is passed through a series of filter routines which do things.
+ *
+ * copyright: GPL Copyleft
+ *
+ * Mark Koennecke, November 2013
+ */
+#ifndef __MESSAGEPIPE
+#define __MESSAGEPIPE
+
+#define MPCONTINUE 1
+#define MPSTOP 0 
+
+/**
+ * The messagePipe data structure defined in messagepipe.c
+ */
+typedef struct __MessagePipe *pMP;
+
+/**
+ * Protoype of the message filter function.
+ * @param message The message to process
+ * @param Optional private data for this message filter function
+ * @return MPSTOP for stopping further processing of the filter pipe 
+ * or MPCONTINUE to continue processing
+ */
+typedef int (*mpFilterFunc)(void *message, void *userData);
+
+/**
+ * A function to free the userData when it is used
+ * @param userData The data structure passed in for userData to a filter function.
+ */ 
+typedef void (*mpUserKill)(void *userData);
+
+
+/**
+ * Create an empty message pipe
+ * @return A message pipe structure or NULL when out of memory
+ */
+pMP MakeMP();
+
+/**
+ * Delete a message pipe 
+ * @param self The message pipe to delete
+ */
+void KillMP(pMP self);
+
+/**
+ * Append a filter function to the list of message filters to process
+ * @param self The message queue to append too
+ * @param func The filter function to append
+ * @param Optional userData to pass through to the filter function
+ * @param usKill An optional function to free the userData when the message pipe gets deleted
+ * @return 0 on success, 1 when out of memory
+ */ 
+int AppendMPFilter(pMP self, mpFilterFunc func, void *userData, mpUserKill usKill);
+
+/**
+ * Preppend a filter function to the list of message filters to process
+ * @param self The message queue to append too
+ * @param func The filter function to append
+ * @param Optional userData to pass through to the filter function
+ * @param usKill An optional function to free the userData when the message pipe gets deleted
+ * @return An updated pointer to the message pipe.
+ */ 
+pMP PrependMPFilter(pMP self, mpFilterFunc func, void *userData, mpUserKill usKill);
+
+
+/**
+ * Process the message pipe with the given message
+ * @param self The messae pipe to process
+ * @param message The message to process.
+ * @return MPCONTINUE on successfull completion, MPABORT when the chain was 
+ * aborted for some reason.
+ */
+int MPprocess(pMP self, void *message);
+
+
+#endif