defines that affect compilation
_WIN32
this should be defined for Win32 platforms
DEBUG_MUTEXES
define this to turn on mutex debugging. this will log locks/unlocks.
CHECK_MUTEXES (DEBUG_MUTEXES must also be defined)
checks to make sure mutex operations make sense. ie, multi_mutex is locked
when locking multiple mutexes, etc.
THREAD_DEBUG (define to 1-4)
turns on the thread.log logging