register_trace

Feedback.register_trace : (string * int ref * int) -> unit

Registers a new tracing variable.

A call to register_trace(n, r, m) registers the integer reference variable r as a tracing variable associated with name n. The integer m is its maximum value. Its value at the time of registration is considered its default value, which will be restored by a call to reset_trace n or reset_traces.

Failure

Fails if there is already a tracing variable registered under the name given, or if either the maximum value or the value in the reference is less than zero.

See also

Feedback, Feedback.register_btrace, Feedback.register_ftrace, Feedback.reset_trace, Feedback.reset_traces, Feedback.trace, Feedback.traces