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/* Copyright (C) 2014 Daniel Dressler and contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. */
#pragma once
#include <libusb.h>
#include <semaphore.h>
/* In seconds */
#define PRINTER_CRASH_TIMEOUT_RECEIVE (60 * 60 * 6)
#define PRINTER_CRASH_TIMEOUT_ANSWER 5
#define CONN_STALE_THRESHHOLD 5
struct usb_interface {
uint8_t interface_number;
uint8_t libusb_interface_index;
int interface_alt;
uint8_t endpoint_in;
uint8_t endpoint_out;
sem_t lock;
};
struct usb_sock_t {
libusb_context *context;
libusb_device_handle *printer;
char *device_id;
int max_packet_size;
uint32_t num_interfaces;
struct usb_interface *interfaces;
uint32_t num_staled;
sem_t num_staled_lock;
sem_t pool_manage_lock;
uint32_t num_avail;
uint32_t num_taken;
uint32_t *interface_pool;
};
struct usb_conn_t {
struct usb_sock_t *parent;
struct usb_interface *interface;
uint32_t interface_index;
int is_staled;
};
struct usb_sock_t *usb_open(void);
void usb_close(struct usb_sock_t *);
int usb_can_callback(struct usb_sock_t *);
void usb_register_callback(struct usb_sock_t *);
struct usb_conn_t *usb_conn_acquire(struct usb_sock_t *);
void usb_conn_release(struct usb_conn_t *);
int usb_conn_packet_send(struct usb_conn_t *, struct http_packet_t *);
struct http_packet_t *usb_conn_packet_get(struct usb_conn_t *, struct http_message_t *);
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