HelenOS sources

irq_spinlock_trylock  200 kernel/generic/include/synch/spinlock.h extern bool irq_spinlock_trylock(irq_spinlock_t *);
irq_spinlock_trylock  253 kernel/generic/src/console/console.c 	if (!irq_spinlock_trylock(&flush_lock)) {
HelenOS homepage, sources at GitHub