PENDING_INTERRUPT_MASK 2013 thread.c       	pending_interrupt = interrupt & PENDING_INTERRUPT_MASK;
PENDING_INTERRUPT_MASK 1136 vm_core.h      #define RUBY_VM_SET_INTERRUPT(th)		ATOMIC_OR((th)->interrupt_flag, PENDING_INTERRUPT_MASK)
PENDING_INTERRUPT_MASK 1139 vm_core.h      #define RUBY_VM_INTERRUPTED(th) ((th)->interrupt_flag & ~(th)->interrupt_mask & (PENDING_INTERRUPT_MASK|TRAP_INTERRUPT_MASK))