/** @file
 * USBLIB - USB Support Library.
 * This module implements the basic low-level OS interfaces.
 */

/*
 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 USA or visit http://www.sun.com if you need
 * additional information or have any questions.
 */

#ifndef ___VBox_usblib_h
#define ___VBox_usblib_h

#include <VBox/cdefs.h>
#include <VBox/types.h>
#include <VBox/usb.h>
#include <VBox/usbfilter.h>

#ifdef RT_OS_WINDOWS
# include <VBox/usblib-win.h>
#endif
#ifdef RT_OS_SOLARIS
# include <VBox/usblib-solaris.h>
#endif
#ifdef RT_OS_DARWIN
# include <VBox/usblib-darwin.h>
#endif
/** @todo merge the usblib-win.h interface into the darwin and linux ports where suitable. */

__BEGIN_DECLS
/** @defgroup grp_USBLib    USBLib - USB Support Library
 * This module implements the basic low-level OS interfaces and common USB code.
 * @{
 */

#ifdef IN_RING3
/**
 * Initializes the USBLib component.
 *
 * The USBLib keeps a per process connection to the kernel driver
 * and all USBLib users within a process will share the same
 * connection. USBLib does reference counting to make sure that
 * the connection remains open until all users has called USBLibTerm().
 *
 * @returns VBox status code.
 *
 * @remark  The users within the process are responsible for not calling
 *          this function at the same time (because I'm lazy).
 */
USBLIB_DECL(int) USBLibInit(void);

/**
 * Terminates the USBLib component.
 *
 * Must match successfull USBLibInit calls.
 *
 * @returns VBox status code.
 */
USBLIB_DECL(int) USBLibTerm(void);

/**
 * Adds a filter.
 *
 * This function will validate and transfer the specified filter
 * to the kernel driver and make it start using it. The kernel
 * driver will return a filter id that this function passes on
 * to its caller.
 *
 * The kernel driver will associate the added filter with the
 * calling process and automatically remove all filters when
 * the process terminates the connection to it or dies.
 *
 * @returns Filter id for passing to USBLibRemoveFilter on success.
 * @returns NULL on failure.
 *
 * @param   pFilter     The filter to add.
 */
USBLIB_DECL(void *) USBLibAddFilter(PCUSBFILTER pFilter);

/**
 * Removes a filter.
 *
 * @param   pvId        The ID returned by USBLibAddFilter.
 */
USBLIB_DECL(void) USBLibRemoveFilter(void *pvId);

/**
 * Calculate the hash of the serial string.
 *
 * 64bit FNV1a, chosen because it is designed to hash in to a power of two
 * space, and is much quicker and simpler than, say, a half MD4.
 *
 * @returns the hash.
 * @param   pszSerial       The serial string.
 */
USBLIB_DECL(uint64_t) USBLibHashSerial(const char *pszSerial);

#endif /* IN_RING3 */

/** @} */
__END_DECLS

#endif

