- extended evcontroller

- remote objects
- new ev drivers for oxford IPS,ITC,ILM and LC
M.Z.

fsm.h

@@ -0,0 +1,66 @@
+/* ----------------------------------------------------------------------------
+fsm.h
+
+a finite state machine
+
+M. Zolliker, Aug 2004
+---------------------------------------------------------------------------- */
+
+#ifndef FSM_H
+#define FSM_H
+
+typedef struct Fsm Fsm;
+
+typedef long (*FsmFunc)(long pc, void *obj);
+/* the prototype for a task function
+   a task function body has the following form:
+   
+   int Func(long pc, Object *obj) {
+     <declarations>
+     BEGIN
+       ...
+     RETURN
+   }
+   
+   The ellipsis might be replaced by any code containing fsm macros.
+   Loops and conditional statements containing fsm macros are not
+   allowed, goto statements may be used instead.
+*/
+
+#define FSM_BEGIN switch (pc) { default:
+#define FSM_END fsm_quit: return 0; }
+
+/* fsm macros: */
+
+#define FSM_NEXT return __LINE__; case __LINE__:
+/* waiting for response */
+
+#define FSM_WAIT(DELTA) FsmWait(DELTA); return __LINE__; case __LINE__:
+/* waiting DELTA seconds */
+
+#define FSM_CALL(FUNC) return FsmCall(__LINE__, (FsmFunc)FUNC); case __LINE__:
+/* call a task subfunction */
+
+typedef int (*FsmHandler)(void *obj);
+/* the prototype for the handler. Should return 0 when waiting for an answer
+   or 1 when result is o.k. */
+
+Fsm *FsmStartTask(void *obj, FsmHandler handler, FsmFunc func);
+/* start a task and return a pointer to it */
+
+int FsmTaskHandler(Fsm *task);
+/* this is the task handler.
+   the argument should be the pointer obtained from FsmStartTask
+   returns 0 when finished, 1 when still running */
+
+int FsmStop(Fsm *task, FsmFunc func);
+/* stop a function. returns to the caller next time */
+
+void FsmPause(Fsm *this, int pause);
+/* pause=1: pause task, pause=0: continue task */
+
+long FsmCall(long pc, FsmFunc func);
+void FsmWait(long delay);
+/* these functions are used in fsm macros and must not be called directly */
+
+#endif