This is a Newlib patch. There are some open questions.
Should we allow nesting?
Which degree of error checks vs. performance do we want?
How do we deal with lock profiling?
Is it all right to forbid blocking calls inside the pthread spinlock
critical section?
Do we want to support trylock (
Turn pthread_spinlock_t into a self-contained object. On uni-processor
configurations, interrupts are disabled in the lock/trylock operations
and the previous interrupt status is restored in the corresponding
unlock operations. On SMP configurations, a ticket lock is a acquired
and released in ad
