Semaphores
Overview
The Grasshopper kernel provides synchronisation support via a system of
counting semaphores. These operations are used for the management of
Grasshoppers' counting semaphores.
Signatures
Status sem_create(
Capref sem,
int init_value )
Create
a semaphore.
Status sem_destroy(
Capref sem )
Destroy
a semaphore.
Status sem_wait(
Capref sem )
Wait
on a semaphore.
Status sem_signal(
Capref sem )
Signal
a semaphore.
Status sem_poll(
Capref sem )
Poll
a semaphore.
Status sem_queue_size(
Capref sem,
int *size )
Determine
the length of a semaphore queue.