Apple do not support spinlocks so we must remap to the much slower
mutexes instead if we think we are compiling for apple.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Add an abstraction for mutexts and threads
that handles both pthread api and native win32 api
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
