fix: InvalidSystemClockException in concurrent

[larrynung]

fix: InvalidSystemClockException in concurrent

Set timestamp outside lock will cause timestamp lower than _lastgen when concurrent run

[RobThree]

Hmm, I don't know what happened here but it was introduced at b582617 ...

Thanks for pointing it out and the PR! 👍

I will publish a new version soon.

[larrynung]

• Thread A, B invoke CreateIdImpl in concurrent
• Thread B set timestamp
• Thread A set timestamp
• Thread A enter lock block, and update _lastgen
• Thread B enter lock block after thread A leave lock block
• Thread B will throw InvalidSystemClockException because timestamp is smaller than _lastgen

[RobThree]

2.4.0