haiku.git

/*
 * Copyright 2011, Haiku, Inc. All RightsReserved.
 * Copyright 2002-03, Thomas Kurschel. All rights reserved.
 * Distributed under the terms of the MIT License.
 */


//!	Basic handling of file handles.


#include "scsi_periph_int.h"

#include <stdlib.h>

#include "dl_list.h"


status_t
periph_handle_open(scsi_periph_device_info *device,
	periph_handle_cookie periph_handle, scsi_periph_handle_info **res_handle)
{
	scsi_periph_handle_info *handle;

//	SHOW_FLOW( 3, "device=%p", device );

	handle = (scsi_periph_handle_info *)malloc(sizeof(*handle));
	if (handle == NULL)
		return B_NO_MEMORY;

	handle->periph_handle = periph_handle;
	handle->device = device;
	handle->pending_error = B_OK;

	mutex_lock(&device->mutex);
	ADD_DL_LIST_HEAD(handle, device->handles, );
	mutex_unlock(&device->mutex);

	*res_handle = handle;

//	SHOW_FLOW( 3, "handle=%p", handle );

	return B_OK;
}


status_t
periph_handle_close(scsi_periph_handle_info *handle)
{
//	SHOW_FLOW( 3, "handle=%p", handle );
	return B_OK;
}


status_t
periph_handle_free(scsi_periph_handle_info *handle)
{
	scsi_periph_device_info *device = handle->device;

//	SHOW_FLOW( 3, "handle=%p, device=%p", handle, handle->device );

	mutex_lock(&device->mutex);
	REMOVE_DL_LIST(handle, device->handles, );
	mutex_unlock(&device->mutex);

	free(handle);

//	SHOW_FLOW0( 3, "done" );

	return B_OK;
}