/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2009 Sylvestre Gallon. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef __LIBUSB10_H__
#define __LIBUSB10_H__

#ifndef LIBUSB_GLOBAL_INCLUDE_FILE
#include <sys/cdefs.h>
#include <sys/queue.h>
#include <netlink/netlink.h>
#include <netlink/netlink_generic.h>
#include <netlink/netlink_snl.h>
#include <netlink/netlink_snl_generic.h>
#include <netlink/netlink_sysevent.h>

#endif

#define GET_CONTEXT(ctx) (((ctx) == NULL) ? usbi_default_context : (ctx))
#define UNEXPORTED __attribute__((__visibility__("hidden")))
#define CTX_LOCK(ctx) pthread_mutex_lock(&(ctx)->ctx_lock)
#define CTX_TRYLOCK(ctx) pthread_mutex_trylock(&(ctx)->ctx_lock)
#define CTX_UNLOCK(ctx) pthread_mutex_unlock(&(ctx)->ctx_lock)
#define HOTPLUG_LOCK(ctx) pthread_mutex_lock(&(ctx)->hotplug_lock)
#define HOTPLUG_UNLOCK(ctx) pthread_mutex_unlock(&(ctx)->hotplug_lock)

void libusb_log_va_args(struct libusb_context *ctx, enum libusb_log_level level,
    const char *fmt, ...) __printflike(3, 4);

#define DPRINTF(ctx, dbg, format, ...) \
        libusb_log_va_args(ctx, dbg, format, ##__VA_ARGS__)

/* internal structures */

struct libusb_super_pollfd {
        TAILQ_ENTRY(libusb_super_pollfd) entry;
        struct libusb20_device *pdev;
        struct libusb_pollfd pollfd;
};

struct libusb_super_transfer {
        TAILQ_ENTRY(libusb_super_transfer) entry;
        uint8_t *curr_data;
        uint32_t rem_len;
        uint32_t last_len;
        uint32_t stream_id;
        uint8_t state;
#define LIBUSB_SUPER_XFER_ST_NONE 0
#define LIBUSB_SUPER_XFER_ST_PEND 1
};

struct libusb_hotplug_callback_handle_struct {
        TAILQ_ENTRY(libusb_hotplug_callback_handle_struct) entry;
        int events;
        int vendor;
        int product;
        int devclass;
        libusb_hotplug_callback_fn fn;
        void *user_data;
};

TAILQ_HEAD(libusb_device_head, libusb_device);

typedef enum {
        usb_event_none,
        usb_event_scan,
        usb_event_devd,
        usb_event_netlink
} usb_event_mode_t;

struct libusb_context {
        int     debug;
        int     debug_fixed;
        int     event;
        int     tr_done_ref;
        int     tr_done_gen;
        usb_event_mode_t usb_event_mode;
        int     devd_pipe;
        struct  snl_state ss;

        pthread_mutex_t ctx_lock;
        pthread_mutex_t hotplug_lock;
        pthread_cond_t ctx_cond;
        pthread_t hotplug_handler;
        pthread_t ctx_handler;
#define NO_THREAD ((pthread_t)-1)

        TAILQ_HEAD(, libusb_super_pollfd) pollfds;
        TAILQ_HEAD(, libusb_super_transfer) tr_done;
        TAILQ_HEAD(, libusb_hotplug_callback_handle_struct) hotplug_cbh;
        struct libusb_device_head hotplug_devs;

        struct libusb_super_pollfd ctx_poll;

        libusb_pollfd_added_cb fd_added_cb;
        libusb_pollfd_removed_cb fd_removed_cb;
        void   *fd_cb_user_data;
};

struct libusb_device {
        int     refcnt;

        int     device_is_gone;

        uint32_t claimed_interfaces;

        struct libusb_super_pollfd dev_poll;

        struct libusb_context *ctx;
        struct libusb_device *parent_dev;

        TAILQ_ENTRY(libusb_device) hotplug_entry;

        TAILQ_HEAD(, libusb_super_transfer) tr_head;

        struct libusb20_device *os_priv;
};

struct libusb_language_context {
        const char *lang_name;
        /* All error Plus 1 UNKNOWN */
        const char *err_strs[LIBUSB_ERROR_COUNT + 1];
};

extern struct libusb_context *usbi_default_context;

void    libusb10_add_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd, struct libusb20_device *pdev, int fd, short events);
void    libusb10_remove_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd);
void    libusb10_cancel_all_transfer(libusb_device *dev);
void    libusb10_cancel_all_transfer_locked(struct libusb20_device *pdev, struct libusb_device *dev);

#endif                                  /* __LIBUSB10_H__ */