C++ (Cpp) ck_barrier_centralized Examples

Example #1

File: ck_ring_spsc.c Project: jedbrown/ck

static void *
test(void *c)
{
	struct context *context = c;
	struct entry *entry;
	int i, j;
	bool r;
	ck_barrier_centralized_state_t sense =
	    CK_BARRIER_CENTRALIZED_STATE_INITIALIZER;

        if (aff_iterate(&a)) {
                perror("ERROR: Could not affine thread");
                exit(EXIT_FAILURE);
        }

	if (context->tid == 0) {
		struct entry *entries;

		entries = malloc(sizeof(struct entry) * size);
		assert(entries != NULL);

		if (ck_ring_size(ring) != 0) {
			ck_error("More entries than expected: %u > 0\n",
				ck_ring_size(ring));
		}

		for (i = 0; i < size; i++) {
			entries[i].value = i;
			entries[i].tid = 0;

			r = ck_ring_enqueue_spsc(ring, entries + i);
			assert(r != false);
		}

		if (ck_ring_size(ring) != (unsigned int)size) {
			ck_error("Less entries than expected: %u < %d\n",
				ck_ring_size(ring), size);
		}

		if (ck_ring_capacity(ring) != ck_ring_size(ring) + 1) {
			ck_error("Capacity less than expected: %u < %u\n",
				ck_ring_size(ring), ck_ring_capacity(ring));
		}
	}

	ck_barrier_centralized(&barrier, &sense, nthr);

	for (i = 0; i < ITERATIONS; i++) {
		for (j = 0; j < size; j++) {
			while (ck_ring_dequeue_spsc(ring + context->previous, &entry) == false);

			if (context->previous != (unsigned int)entry->tid) {
				ck_error("[%u:%p] %u != %u\n",
					context->tid, (void *)entry, entry->tid, context->previous);
			}

			if (entry->value != j) {
				ck_error("[%u:%p] %u != %u\n",
					context->tid, (void *)entry, entry->tid, context->previous);
			}

			entry->tid = context->tid;
			r = ck_ring_enqueue_spsc(ring + context->tid, entry);
			assert(r == true);
		}
	}

	return NULL;
}

Example #2

File: ck_ring_spmc.c Project: 2trill2spill/nextgen

static void *
test(void *c)
{
	struct context *context = c;
	struct entry *entry;
	unsigned int s;
	int i, j;
	bool r;
	ck_ring_buffer_t *buffer = context->buffer;
	ck_barrier_centralized_state_t sense =
	    CK_BARRIER_CENTRALIZED_STATE_INITIALIZER;

        if (aff_iterate(&a)) {
                perror("ERROR: Could not affine thread");
                exit(EXIT_FAILURE);
        }

	if (context->tid == 0) {
		struct entry *entries;

		entries = malloc(sizeof(struct entry) * size);
		assert(entries != NULL);

		if (ck_ring_size(ring) != 0) {
			ck_error("More entries than expected: %u > 0\n",
				ck_ring_size(ring));
		}

		for (i = 0; i < size; i++) {
			entries[i].value = i;
			entries[i].tid = 0;

			if (i & 1) {
				r = ck_ring_enqueue_spmc(ring, buffer,
				    entries + i);
			} else {
				r = ck_ring_enqueue_spmc_size(ring, buffer,
					entries + i, &s);

				if ((int)s != i) {
					ck_error("Size is %u, expected %d.\n",
					    s, size);
				}
			}

			assert(r != false);
		}

		if (ck_ring_size(ring) != (unsigned int)size) {
			ck_error("Less entries than expected: %u < %d\n",
				ck_ring_size(ring), size);
		}

		if (ck_ring_capacity(ring) != ck_ring_size(ring) + 1) {
			ck_error("Capacity less than expected: %u < %u\n",
				ck_ring_size(ring), ck_ring_capacity(ring));
		}
	}

	/*
	 * Wait for all threads. The idea here is to maximize the contention.
	 */
	ck_barrier_centralized(&barrier, &sense, nthr);

	for (i = 0; i < ITERATIONS; i++) {
		for (j = 0; j < size; j++) {
			buffer = _context[context->previous].buffer;
			while (ck_ring_dequeue_spmc(ring + context->previous,
			    buffer, &entry) == false);

			if (context->previous != (unsigned int)entry->tid) {
				ck_error("[%u:%p] %u != %u\n",
					context->tid, (void *)entry, entry->tid, context->previous);
			}

			if (entry->value < 0 || entry->value >= size) {
				ck_error("[%u:%p] %u </> %u\n",
					context->tid, (void *)entry, entry->tid, context->previous);
			}

			entry->tid = context->tid;
			buffer = context->buffer;

			if (i & 1) {
				r = ck_ring_enqueue_spmc(ring + context->tid,
					buffer, entry);
			} else {
				r = ck_ring_enqueue_spmc_size(ring + context->tid,
					buffer, entry, &s);

				if ((int)s >= size) {
					ck_error("Size %u out of range of %d\n",
					    s, size);
				}
			}
			assert(r == true);
		}
	}

	return NULL;
}