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.Dd April 20, 2013
.Dt CK_RING_ENQUEUE_SPMC 3
.Sh NAME
.Nm ck_ring_enqueue_spmc
.Nd enqueue pointer into bounded FIFO
.Sh LIBRARY
Concurrency Kit (libck, \-lck)
.Sh SYNOPSIS
.In ck_ring.h
.Ft bool
.Fn ck_ring_enqueue_spmc "ck_ring_t *ring" "void *entry"
.Sh DESCRIPTION
The
.Fn ck_ring_enqueue_spmc 3
function enqueues the pointer
.Fa entry
into the bounded buffer pointed to by
.Fa ring
in FIFO fashion. 
If you are on non-POSIX platforms or wish for strict
compliance with C, then it is recommended to pass a
pointer of type void ** for
.Fa entry .
This function is safe to call without locking for UINT_MAX
concurrent invocations of
.Fn ck_ring_dequeue_spmc 3
or
.Fn ck_ring_trydequeue_spmc 3 .
This function provides wait-free progress
guarantees for one active invocation.
.Sh EXAMPLE
.Bd -literal -offset indent
#include <ck_ring.h>

/* This ring was previously initialized with ck_ring_init. */
ck_ring_t ring;

void
enqueue(void)
{
	void *entry = some_object;

	/* Attempt to enqueue pointer to some_object into buffer. */
	if (ck_ring_enqueue_spmc(&ring, &entry) == false) {
		/*
		 * The buffer was full and the enqueue operation
		 * has failed.
		 */
		return;
	}

	/* Enqueue operation completed successfully. */
	return; 
}
.Ed
.Sh RETURN VALUES
The function returns true if the value of 
.Fa entry
was successfully enqueued into
.Fa ring .
The function will return false if the value of
.Fa entry
could not be enqueued which only occurs if
.Fa ring
was full.
.Sh SEE ALSO
.Xr ck_ring_init 3 ,
.Xr ck_ring_dequeue_spmc 3 ,
.Xr ck_ring_trydequeue_spmc 3 ,
.Xr ck_ring_enqueue_spmc_size 3 ,
.Xr ck_ring_dequeue_spsc 3 ,
.Xr ck_ring_enqueue_spsc 3 ,
.Xr ck_ring_enqueue_spsc_size 3 ,
.Xr ck_ring_capacity 3 ,
.Xr ck_ring_size 3
.Pp
Additional information available at http://concurrencykit.org/