samples/event_flag/host.c

/*
 * Copyright 2008 Sony Corporation of America
 *
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <unistd.h>
#include <libspe2.h>
#include <mars/task.h>

#define INFO	\
"\
MARS Task Event Flag Sample					\n\
---------------------------					\n\
This program shows the basic usage of the MARS task event	\n\
flag synchronization between the host program and multiple	\n\
MPU programs.							\n\
								\n\
This program creates 2 tasks and creates 3 event flags.		\n\
								\n\
The first event flag is used to synchronize between the		\n\
host program and task 1. Task 1 can only begin processing	\n\
after the host program has waited 1 second and sets the event	\n\
flag for task 1 to begin.					\n\
								\n\
The second event flag is used to synchronize between the 2	\n\
tasks. Task 2 can only begin processing after task 1 has	\n\
completed its processing and sets the event flag for task 2	\n\
to begin.							\n\
								\n\
The third event flag is used to synchronize between task 2	\n\
and the host program. The host program waits until task 2	\n\
has completed its processing and sets the event flag for the	\n\
host program to continue and finish execution.			\n\
\n"

extern struct spe_program_handle mpu_task1_prog;
extern struct spe_program_handle mpu_task2_prog;

static struct mars_context *mars_ctx;
static struct mars_task_id task1_id;
static struct mars_task_id task2_id;
static struct mars_task_args task_args;
static uint64_t host_to_mpu_ea;
static uint64_t mpu_to_host_ea;
static uint64_t mpu_to_mpu_ea;

int main(void)
{
	int ret;

	printf(INFO);

	ret = mars_context_create(&mars_ctx, 0, 0);
	if (ret) {
		printf("MARS context create failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_create(mars_ctx, &host_to_mpu_ea,
					MARS_TASK_EVENT_FLAG_HOST_TO_MPU,
					MARS_TASK_EVENT_FLAG_CLEAR_AUTO);
	if (ret) {
		printf("MARS task event flag create failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_create(mars_ctx, &mpu_to_host_ea,
					MARS_TASK_EVENT_FLAG_MPU_TO_HOST,
					MARS_TASK_EVENT_FLAG_CLEAR_AUTO);
	if (ret) {
		printf("MARS task event flag create failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_create(mars_ctx, &mpu_to_mpu_ea,
					MARS_TASK_EVENT_FLAG_MPU_TO_MPU,
					MARS_TASK_EVENT_FLAG_CLEAR_AUTO);
	if (ret) {
		printf("MARS task event flag create failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_create(mars_ctx, &task1_id, "Task 1",
		mpu_task1_prog.elf_image, MARS_TASK_CONTEXT_SAVE_SIZE_MAX);
	if (ret) {
		printf("MARS task 1 create failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_create(mars_ctx, &task2_id, "Task 2",
		mpu_task2_prog.elf_image, MARS_TASK_CONTEXT_SAVE_SIZE_MAX);
	if (ret) {
		printf("MARS task 1 create failed! (%d)\n", ret);
		return 1;
	}

	task_args.type.u64[0] = host_to_mpu_ea;
	task_args.type.u64[1] = mpu_to_mpu_ea;
	ret = mars_task_schedule(&task1_id, &task_args, 0);
	if (ret) {
		printf("MARS task 1 schedule failed! (%d)\n", ret);
		return 1;
	}

	task_args.type.u64[0] = mpu_to_mpu_ea;
	task_args.type.u64[1] = mpu_to_host_ea;
	ret = mars_task_schedule(&task2_id, &task_args, 0);
	if (ret) {
		printf("MARS task 2 schedule failed! (%d)\n", ret);
		return 1;
	}

	printf("HOST  : Main() - Wait 1 sec to set HOST to MPU event\n");
	sleep(1);

	printf("HOST  : Main() - Set HOST to MPU event\n");

	ret = mars_task_event_flag_set(host_to_mpu_ea, 0x1);
	if (ret) {
		printf("MARS task event flag set failed! (%d)\n", ret);
		return 1;
	}

	printf("HOST  : Main() - Wait for MPU to HOST event\n");

	ret = mars_task_event_flag_wait(mpu_to_host_ea, 0x1,
				MARS_TASK_EVENT_FLAG_MASK_AND, NULL);
	if (ret) {
		printf("MARS task event flag wait failed! (%d)\n", ret);
		return 1;
	}

	printf("HOST  : Main() - Received MPU to HOST event\n");

	ret = mars_task_wait(&task1_id, NULL);
	if (ret) {
		printf("MARS task 1 wait failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_wait(&task2_id, NULL);
	if (ret) {
		printf("MARS task 2 wait failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_destroy(&task1_id);
	if (ret) {
		printf("MARS task 1 destroy failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_destroy(&task2_id);
	if (ret) {
		printf("MARS task 2 destroy failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_destroy(host_to_mpu_ea);
	if (ret) {
		printf("MARS task event flag destroy failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_destroy(mpu_to_host_ea);
	if (ret) {
		printf("MARS task event flag destroy failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_task_event_flag_destroy(mpu_to_mpu_ea);
	if (ret) {
		printf("MARS task event flag destroy failed! (%d)\n", ret);
		return 1;
	}

	ret = mars_context_destroy(mars_ctx);
	if (ret) {
		printf("MARS context destroy failed! (%d)\n", ret);
		return 1;
	}

	return 0;
}