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avoid timing stats calculation with <= values from get_microseconds()

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This commit is contained in:
Paul Davis 2021-06-29 11:13:59 -06:00
parent a9f285b82b
commit a36ab0c562
1 changed files with 4 additions and 5 deletions
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9
libs/pbd/pbd/timing.h
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@ -143,14 +143,13 @@ public:
} else {
Timing::update ();
/* querying the performance counter can fail occasionally (-1).
/* On Windows, querying the performance counter can fail occasionally (-1).
* Also on some multi-core systems, timers are CPU specific and not
* synchronized. We assume they differ more than a few milliseconds
* (4 * nominal cycle time) and simply ignore cases where the
* execution switches cores.
* synchronized. The query can also fail, which will
* result in a value of zero, which is essentially impossible.
*/
if (m_start_val < 0 || m_last_val < 0 || m_start_val > m_last_val) {
if (m_start_val <= 0 || m_last_val <= 0 || m_start_val > m_last_val) {
return;
}