astar_worker.c

#include <stdbool.h>
#include <stdlib.h>
#include <assert.h>
#include "astar.h"
#include "astar_worker.h"
#include "level.h"
#include "worker.h"

static struct worker s_astar_worker;

struct astar_job
{
	struct level_t *level;
	struct point a;
	struct point b;
	astar_callback callback;
	void *data;
};

static void astar_worker(void *arg)
{
	struct astar_job *job = arg;

	if (job->callback != NULL)
	{
		struct point *path = as_find(job->level, &job->a, &job->b);
		if (job->callback != NULL)
		{
			job->callback(job->level, path, job->data);
		}
		else
		{
			free(path);
		}
	}

	level_inuse(job->level, false);

	free(job);
}

void astar_worker_init(void)
{
	worker_init(&s_astar_worker, "astar", 30000, 5, astar_worker);
}

void astar_worker_deinit(void)
{
	worker_deinit(&s_astar_worker);
}

void *astar_queue(struct level_t *level, const struct point *a, const struct point *b, astar_callback callback, void *data)
{
	assert(level != NULL);
	assert(a != NULL);
	assert(b != NULL);
	assert(callback != NULL);

	if (!level_inuse(level, true)) return NULL;

	struct astar_job *job = malloc(sizeof *job);
	job->level = level;
	job->a = *a;
	job->b = *b;
	job->callback = callback;
	job->data = data;

	worker_queue(&s_astar_worker, job);
	return job;
}

void astar_cancel(void *data)
{
	struct astar_job *job = data;
	if (job != NULL) job->callback = NULL;
}