Module parallel_trace 

Optional stderr tracing for mysync mutations under trace { ... } and fan.

Functions

emit_scalar_mutation

Emit one line for a scalar mutation (mysync / atomic scalar).

fan_worker_set_index

Set the current worker index for fan [N] { } (typically $_ as integer).

is_enabled

trace_enter

Begin a trace { ... } region (all threads see the same flag).

trace_leave