soprintln

(Note: This is only useful when implementing the xgraph dynamic linking model, see https://github.com/bearcove/rubicon)

This crate provides the soprintln! macro, a debug variant of println! that:

• Is disabled if the print feature cargo feature is not enabled
• Is disabled if the SOPRINTLN environment variable isn't set to one
• Prefixes the message with:
• a truncated millisecond timestamp
• a beacon of the shared object ID
• a beacon of the thread name + ID

Beacons are 64-bit integers (can be initialized from pointers) whose color depend on their value. It makes it easier to spot the same value being re-used a bunch.