trace: separate trace event control and query routines from the simple backend
Generalize the 'st_print_trace_events' and 'st_change_trace_event_state' into
backend-specific 'trace_print_events' and 'trace_event_set_state' (respectively)
in the "trace/control.h" file.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
diff --git a/trace/control.h b/trace/control.h
index bb54339..c99b4d5 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -10,7 +10,16 @@
#ifndef TRACE_CONTROL_H
#define TRACE_CONTROL_H
-#include <stdbool.h>
+#include "qemu-common.h"
+
+
+/** Print the state of all events. */
+void trace_print_events(FILE *stream, fprintf_function stream_printf);
+/** Set the state of an event.
+ *
+ * @return Whether the state changed.
+ */
+bool trace_event_set_state(const char *name, bool state);
/** Initialize the tracing backend.
