C++ (Cpp) agp_find_controller_by_pid示例

示例#1

文件： agpgart_fe.c 项目： GunioRobot/MI424WR_GEN2_Rev_E-F

static int agpioc_acquire_wrap(agp_file_private * priv, unsigned long arg)
{
	agp_controller *controller;
	if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags))) {
		return -EPERM;
	}
	if (agp_fe.current_controller != NULL) {
		return -EBUSY;
	}
	if ((agp_backend_acquire()) == 0) {
		agp_fe.backend_acquired = TRUE;
	} else {
		return -EBUSY;
	}

	controller = agp_find_controller_by_pid(priv->my_pid);

	if (controller != NULL) {
		agp_controller_make_current(controller);
	} else {
		controller = agp_create_controller(priv->my_pid);

		if (controller == NULL) {
			agp_fe.backend_acquired = FALSE;
			agp_backend_release();
			return -ENOMEM;
		}
		agp_insert_controller(controller);
		agp_controller_make_current(controller);
	}

	set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
	set_bit(AGP_FF_IS_VALID, &priv->access_flags);
	return 0;
}

示例#2

文件： frontend.c 项目： FelipeFernandes1988/Alice-1121-Modem

static int agp_release(struct inode *inode, struct file *file)
{
	struct agp_file_private *priv = file->private_data;

	down(&(agp_fe.agp_mutex));

	DBG("priv=%p", priv);

	if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
		struct agp_controller *controller;

		controller = agp_find_controller_by_pid(priv->my_pid);

		if (controller != NULL) {
			if (controller == agp_fe.current_controller)
				agp_controller_release_current(controller, priv);
			agp_remove_controller(controller);
			controller = NULL;
		}
	}

	if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags))
		agp_remove_client(priv->my_pid);

	agp_remove_file_private(priv);
	kfree(priv);
	file->private_data = NULL;
	up(&(agp_fe.agp_mutex));
	return 0;
}

示例#3

文件： agpgart_fe.c 项目： GunioRobot/MI424WR_GEN2_Rev_E-F

static int agp_release(struct inode *inode, struct file *file)
{
	agp_file_private *priv = (agp_file_private *) file->private_data;

	lock_kernel();
	AGP_LOCK();

	if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
		agp_controller *controller;

		controller = agp_find_controller_by_pid(priv->my_pid);

		if (controller != NULL) {
			if (controller == agp_fe.current_controller) {
				agp_controller_release_current(controller,
							       priv);
			}
			agp_remove_controller(controller);
		}
	}
	if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags)) {
		agp_remove_client(priv->my_pid);
	}
	agp_remove_file_private(priv);
	kfree(priv);
	AGP_UNLOCK();
	unlock_kernel();
	return 0;
}

示例#4

文件： frontend.c 项目： FelipeFernandes1988/Alice-1121-Modem

static int agpioc_acquire_wrap(struct agp_file_private *priv)
{
	int ret;
	struct agp_controller *controller;

	DBG("");

	if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags)))
		return -EPERM;

	if (agp_fe.current_controller != NULL)
		return -EBUSY;

	ret = agp_backend_acquire();
	if (ret == 0)
		agp_fe.backend_acquired = TRUE;
	else
		return ret;

	controller = agp_find_controller_by_pid(priv->my_pid);

	if (controller != NULL) {
		agp_controller_make_current(controller);
	} else {
		controller = agp_create_controller(priv->my_pid);

		if (controller == NULL) {
			agp_fe.backend_acquired = FALSE;
			agp_backend_release();
			return -ENOMEM;
		}
		agp_insert_controller(controller);
		agp_controller_make_current(controller);
	}

	set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
	set_bit(AGP_FF_IS_VALID, &priv->access_flags);
	return 0;
}