zephyr/samples/microkernel/benchmark/app_kernel/src/event_b.c

/* event_b.c */

/*
 * Copyright (c) 1997-2014 Wind River Systems, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "master.h"

#ifdef EVENT_BENCH

/* #define EVENT_CHECK */
#ifdef EVENT_CHECK
static char EventSignalErr[] = "------------ Error signalling event.\n";
static char EventTestErr[] = "------------ Error testing event.\n";
static char EventHandlerErr[] = "------------ Error in event handler.\n";
#endif

/* global Event value */
volatile int nEventValue;

/*
 * Function prototypes.
 */
int example_handler (int event);

/*
 * Function declarations.
 */

/**
 *
 * @brief Event signal speed test
 *
 * @return N/A
 */
void event_test(void)
{
	int nReturn;
	int nCounter;
	uint32_t et; /* elapsed time */

	PRINT_STRING(dashline, output_file);
	et = BENCH_START();
	for (nCounter = 0; nCounter < NR_OF_EVENT_RUNS; nCounter++) {
		nReturn = task_event_send(TEST_EVENT);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventSignalErr, output_file);
			return; /* error */
		}
#endif /* EVENT_CHECK */
	}
	et = TIME_STAMP_DELTA_GET(et);
	check_result();

	PRINT_F(output_file, FORMAT, "Signal enabled event",
			SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_EVENT_RUNS));

	et = BENCH_START();
	for (nCounter = 0; nCounter < NR_OF_EVENT_RUNS; nCounter++) {
		nReturn = task_event_send(TEST_EVENT);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventSignalErr, output_file);
			task_sleep(SLEEP_TIME);
			return; /* error */
		}
#endif /* EVENT_CHECK */
		nReturn = task_event_recv(TEST_EVENT, TICKS_NONE);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventTestErr, output_file);
			task_sleep(SLEEP_TIME);
			return; /* error */
		}
#endif /* EVENT_CHECK */
	}
	et = TIME_STAMP_DELTA_GET(et);
	check_result();

	PRINT_F(output_file, FORMAT, "Signal event & Test event",
			SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_EVENT_RUNS));

	et = BENCH_START();
	for (nCounter = 0; nCounter < NR_OF_EVENT_RUNS; nCounter++) {
		nReturn = task_event_send(TEST_EVENT);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventSignalErr, output_file);
			return; /* error */
		}
#endif /* EVENT_CHECK */
		nReturn = task_event_recv(TEST_EVENT, TICKS_UNLIMITED);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventTestErr, output_file);
			return; /* error */
		}
#endif /* EVENT_CHECK */
	}
	et = TIME_STAMP_DELTA_GET(et);
	check_result();

	PRINT_F(output_file, FORMAT, "Signal event & TestW event",
			SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_EVENT_RUNS));

	PRINT_STRING("| Signal event with installed handler"
				 "                                         |\n", output_file);
	nReturn = task_event_handler_set (TEST_EVENT, example_handler);
	if (nReturn != RC_OK) {
		PRINT_F(output_file, "-------- Error installing event handler.\n");
		task_sleep(SLEEP_TIME);
		return; /* error */
	}

	for (nCounter = 0; nCounter < NR_OF_EVENT_RUNS; nCounter++) {
		nReturn = task_event_send(TEST_EVENT);
#ifdef EVENT_CHECK
		if (nReturn != RC_OK) {
			PRINT_STRING(EventSignalErr, output_file);
			task_sleep(SLEEP_TIME);
			return; /* error */
		}
		if (nEventValue != TEST_EVENT + 1) {
			PRINT_STRING(EventHandlerErr, output_file);
			task_sleep(SLEEP_TIME);
			return; /* error */
		}
#endif /* EVENT_CHECK */
		nEventValue = 0;
	}

	nReturn = task_event_handler_set (TEST_EVENT, NULL);
	if (nReturn != RC_OK) {
		PRINT_F(output_file, "Error removing event handler.\n");
		task_sleep(SLEEP_TIME);
		return; /* error */
	}

	PRINT_STRING("|    Handler responds OK"
				 "                                                      |\n",
				 output_file);

	return; /* success */
}


/**
 *
 * @brief Event handler for the tests
 *
 * The event handler for the test. Sets up nEventValue global variable.
 * This variable is used in the main test.
 *
 * @return 1
 */
int example_handler (int event)
{
	nEventValue = event + 1;

	return 1;
}

#endif /* EVENT_BENCH */