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VM: better logic in factor_vm::set_sampling_profiler 

It avoids the double-negation.
locals-and-roots
Björn Lindqvist 2016-05-19 01:25:53 +02:00
parent 05de15bdc1
commit 08c2e3a32d
1 changed files with 3 additions and 6 deletions
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9
vm/sampling_profiler.cpp
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@ -57,13 +57,10 @@ void factor_vm::record_callstack_sample(cell* begin, cell* end, bool prolog_p) {
} }
void factor_vm::set_sampling_profiler(fixnum rate) { void factor_vm::set_sampling_profiler(fixnum rate) {
bool sampling_p = !!rate; bool running_p = (bool)atomic::load(&sampling_profiler_p);
if (sampling_p == !!atomic::load(&sampling_profiler_p)) if (rate > 0 && !running_p)
return;
if (sampling_p)
start_sampling_profiler(rate); start_sampling_profiler(rate);
else else if (rate == 0 && running_p)
end_sampling_profiler(); end_sampling_profiler();
} }