[Live-devel] Use of std::atomic_flag

[Dmitry Bely]

Hi,
Recent versions of live555 use std::atomic_flag array to work with
event triggers. Consider the following code fragment:

 #ifndef NO_STD_LIB
      if (fTriggersAwaitingHandling[i].test()) {
       fTriggersAwaitingHandling[i].clear();
 #else

It is problematic in two ways: 1) it's not atomic: the value can be
changed elsewhere between test() and clear() and 2) it requires
C++>=20. This can be easily fixed by replacing std::atomic_flag with
std::atomic_bool, that needs just C++11. The patch is attached, maybe
you find it useful.

- Dmitry Bely
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