Ejemplo n.º 1
0
/**
 * Creates a new process to be executed by one of the kernel pipelines.
 * The structure pointed by attr is defined in rtdal_process_attr.

 *
 * rtdal_process_new() configures the process parameters and loads it into the
 * pipeline. The process won't execute until a success call to rtdal_process_run()
 * is performed.
 *
 * The address pointed by arg will be passed to the process as a parameter.
 *
 * Notes: The shared library must conform with the rtdal_process_t requirements.
 *
 * @param attr Configures the process attributes
 * @param arg Argument to pass to the process each execution cycle
 * @return non-null value on success, zero on error
 */
r_proc_t rtdal_process_new(struct rtdal_process_attr *attr, void *arg) {
	hdebug("binary=%s, proc=%d, pos=%d, finish=0x%x, arg=0x%x\n",attr->binary_path,attr->pipeline_id,
			attr->exec_position,attr->finish_callback,arg);
	assert(context);
	RTDAL_ASSERT_PARAM_P(attr);
	RTDAL_ASSERT_PARAM_P(arg);

	pthread_mutex_lock(&context->mutex);
	int i=0;
	/* find empty space on process db */
	for (i=0;i<MAX(rtdal_process);i++) {
		if (!context->processes[i].pid)
			break;
	}

	if (i == MAX(rtdal_process)) {
		RTDAL_SETERROR(RTDAL_ERROR_NOSPACE);
		goto out;
	}

	if (attr->process_group_id > MAX_PROCESS_GROUP_ID) {
		RTDAL_SETERROR(RTDAL_ERROR_NOSPACE);
		goto out;
	}

	if (attr->process_group_id < 0) {
		RTDAL_SETERROR(RTDAL_ERROR_INVAL);
		goto out;
	}

	pgroup_notified_failure[attr->process_group_id] = 0;
	memset(&context->processes[i],0,sizeof(rtdal_process_t));
	context->processes[i].pid=i+1;

	hdebug("i=%d, pid=%d\n",context->processes[i].pid);

	memcpy(&context->processes[i].attributes, attr,
			sizeof(struct rtdal_process_attr));
	context->processes[i].arg = arg;
	context->processes[i].finish_code = FINISH_OK;

	if (pipeline_add(&context->pipelines[attr->pipeline_id],
			&context->processes[i]) == -1) {
		goto out;
	}

	if (rtdal_process_launch(&context->processes[i])) {
		pipeline_remove(&context->pipelines[attr->pipeline_id],
				&context->processes[i]);
		goto out;
	}

	pthread_mutex_unlock(&context->mutex);
	return (r_proc_t) &context->processes[i];
out:
	pthread_mutex_unlock(&context->mutex);
	return NULL;
}
Ejemplo n.º 2
0
inline static void pipeline_run_thread_run_module(pipeline_t *pipe,
		rtdal_process_t *proc, int idx) {
	hdebug("pipeid=%d, pid=%d, idx=%d, run=%d\n",pipe->id,proc->pid,idx,proc->runnable);
	if (proc->runnable) {
		pipe->running_process = proc;
		pipe->running_process_idx = idx;
		proc->is_running = 1;
		if (proc->run_point(proc->arg)) {
			aerror_msg("Error running module %d:%d\n",
					pipe->id,pipe->running_process_idx);
			pipeline_remove(pipe,proc);
			proc->is_running = 0;
		}
		proc->is_running = 0;
	}
}
Ejemplo n.º 3
0
/**
 * Removes a process from the system, previously loaded using rtdal_process_new().
 * rtdal_process_remove() removes the process from the allocated pipeline and
 * then unloads the program code from memory. After, if a finish_callback function
 * was provided in the process attributes during rtdal_process_new(), it is now
 * called.

 *  @param obj Pointer to the rtdal_process_t object.
 *  @return Zero on success, -1 on error.
 */
int rtdal_process_remove(r_proc_t process) {
	RTDAL_ASSERT_PARAM(process);
	rtdal_process_t *obj = (rtdal_process_t*) process;
	hdebug("pid=%d\n",obj->pid)

	if (pipeline_remove((pipeline_t*) obj->pipeline, obj)) {
		return -1;
	}

	dlclose(obj->dl_handle);

	snprintf(tmp,LSTR_LEN,"/tmp/am_%d.so",obj->pid);
	snprintf(tmp2,LSTR_LEN,"rm %s",tmp);
	if (system(tmp2) == -1) {
		aerror("Error removing file\n");
		return -1;
	}

	obj->pid = 0;

	return 0;
}