mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
31f7072c3b
1) We need to allow the USB callback to free the USB transfer itself. 2) The USB transfer buffer should only be automatically freed when freeing the USB transfer. Fixed by: hselasky Submitted by: Gustau Perez i Querol Approved by: thompsa (mentor)
739 lines
16 KiB
C
739 lines
16 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2009 Sylvestre Gallon. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/queue.h>
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#include <errno.h>
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#include <poll.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#define libusb_device_handle libusb20_device
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#include "libusb20.h"
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#include "libusb20_desc.h"
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#include "libusb20_int.h"
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#include "libusb.h"
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#include "libusb10.h"
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UNEXPORTED void
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libusb10_add_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd,
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struct libusb20_device *pdev, int fd, short events)
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{
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if (ctx == NULL)
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return; /* invalid */
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if (pollfd->entry.tqe_prev != NULL)
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return; /* already queued */
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if (fd < 0)
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return; /* invalid */
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pollfd->pdev = pdev;
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pollfd->pollfd.fd = fd;
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pollfd->pollfd.events = events;
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CTX_LOCK(ctx);
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TAILQ_INSERT_TAIL(&ctx->pollfds, pollfd, entry);
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CTX_UNLOCK(ctx);
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if (ctx->fd_added_cb)
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ctx->fd_added_cb(fd, events, ctx->fd_cb_user_data);
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}
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UNEXPORTED void
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libusb10_remove_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd)
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{
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if (ctx == NULL)
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return; /* invalid */
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if (pollfd->entry.tqe_prev == NULL)
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return; /* already dequeued */
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CTX_LOCK(ctx);
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TAILQ_REMOVE(&ctx->pollfds, pollfd, entry);
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pollfd->entry.tqe_prev = NULL;
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CTX_UNLOCK(ctx);
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if (ctx->fd_removed_cb)
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ctx->fd_removed_cb(pollfd->pollfd.fd, ctx->fd_cb_user_data);
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}
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/* This function must be called locked */
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static int
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libusb10_handle_events_sub(struct libusb_context *ctx, struct timeval *tv)
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{
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struct libusb_device *dev;
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struct libusb20_device **ppdev;
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struct libusb_super_pollfd *pfd;
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struct pollfd *fds;
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struct libusb_super_transfer *sxfer;
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struct libusb_transfer *uxfer;
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nfds_t nfds;
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int timeout;
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int i;
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int err;
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DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb10_handle_events_sub enter");
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nfds = 0;
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i = 0;
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TAILQ_FOREACH(pfd, &ctx->pollfds, entry)
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nfds++;
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fds = alloca(sizeof(*fds) * nfds);
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if (fds == NULL)
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return (LIBUSB_ERROR_NO_MEM);
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ppdev = alloca(sizeof(*ppdev) * nfds);
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if (ppdev == NULL)
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return (LIBUSB_ERROR_NO_MEM);
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TAILQ_FOREACH(pfd, &ctx->pollfds, entry) {
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fds[i].fd = pfd->pollfd.fd;
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fds[i].events = pfd->pollfd.events;
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fds[i].revents = 0;
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ppdev[i] = pfd->pdev;
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if (pfd->pdev != NULL)
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libusb_get_device(pfd->pdev)->refcnt++;
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i++;
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}
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if (tv == NULL)
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timeout = -1;
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else
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timeout = (tv->tv_sec * 1000) + ((tv->tv_usec + 999) / 1000);
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CTX_UNLOCK(ctx);
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err = poll(fds, nfds, timeout);
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CTX_LOCK(ctx);
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if ((err == -1) && (errno == EINTR))
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err = LIBUSB_ERROR_INTERRUPTED;
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else if (err < 0)
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err = LIBUSB_ERROR_IO;
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if (err < 1) {
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for (i = 0; i != (int)nfds; i++) {
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if (ppdev[i] != NULL) {
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CTX_UNLOCK(ctx);
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libusb_unref_device(libusb_get_device(ppdev[i]));
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CTX_LOCK(ctx);
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}
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}
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goto do_done;
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}
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for (i = 0; i != (int)nfds; i++) {
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if (ppdev[i] != NULL) {
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dev = libusb_get_device(ppdev[i]);
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if (fds[i].revents == 0)
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err = 0; /* nothing to do */
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else
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err = libusb20_dev_process(ppdev[i]);
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if (err) {
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/* cancel all transfers - device is gone */
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libusb10_cancel_all_transfer(dev);
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/* remove USB device from polling loop */
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libusb10_remove_pollfd(dev->ctx, &dev->dev_poll);
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}
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CTX_UNLOCK(ctx);
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libusb_unref_device(dev);
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CTX_LOCK(ctx);
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} else {
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uint8_t dummy;
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while (1) {
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if (read(fds[i].fd, &dummy, 1) != 1)
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break;
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}
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}
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}
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err = 0;
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do_done:
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/* Do all done callbacks */
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while ((sxfer = TAILQ_FIRST(&ctx->tr_done))) {
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uint8_t flags;
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TAILQ_REMOVE(&ctx->tr_done, sxfer, entry);
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sxfer->entry.tqe_prev = NULL;
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ctx->tr_done_ref++;
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CTX_UNLOCK(ctx);
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uxfer = (struct libusb_transfer *)(
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((uint8_t *)sxfer) + sizeof(*sxfer));
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/* Allow the callback to free the transfer itself. */
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flags = uxfer->flags;
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if (uxfer->callback != NULL)
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(uxfer->callback) (uxfer);
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/* Check if the USB transfer should be automatically freed. */
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if (flags & LIBUSB_TRANSFER_FREE_TRANSFER)
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libusb_free_transfer(uxfer);
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CTX_LOCK(ctx);
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ctx->tr_done_ref--;
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ctx->tr_done_gen++;
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}
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/* Wakeup other waiters */
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pthread_cond_broadcast(&ctx->ctx_cond);
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return (err);
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}
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/* Polling and timing */
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int
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libusb_try_lock_events(libusb_context *ctx)
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{
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int err;
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ctx = GET_CONTEXT(ctx);
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if (ctx == NULL)
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return (1);
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err = CTX_TRYLOCK(ctx);
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if (err)
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return (1);
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err = (ctx->ctx_handler != NO_THREAD);
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if (err)
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CTX_UNLOCK(ctx);
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else
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ctx->ctx_handler = pthread_self();
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return (err);
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}
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void
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libusb_lock_events(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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CTX_LOCK(ctx);
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if (ctx->ctx_handler == NO_THREAD)
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ctx->ctx_handler = pthread_self();
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}
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void
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libusb_unlock_events(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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if (ctx->ctx_handler == pthread_self()) {
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ctx->ctx_handler = NO_THREAD;
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pthread_cond_broadcast(&ctx->ctx_cond);
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}
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CTX_UNLOCK(ctx);
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}
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int
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libusb_event_handling_ok(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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return (ctx->ctx_handler == pthread_self());
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}
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int
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libusb_event_handler_active(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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return (ctx->ctx_handler != NO_THREAD);
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}
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void
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libusb_lock_event_waiters(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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CTX_LOCK(ctx);
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}
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void
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libusb_unlock_event_waiters(libusb_context *ctx)
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{
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ctx = GET_CONTEXT(ctx);
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CTX_UNLOCK(ctx);
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}
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int
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libusb_wait_for_event(libusb_context *ctx, struct timeval *tv)
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{
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struct timespec ts;
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int err;
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ctx = GET_CONTEXT(ctx);
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DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_wait_for_event enter");
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if (tv == NULL) {
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pthread_cond_wait(&ctx->ctx_cond,
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&ctx->ctx_lock);
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return (0);
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}
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err = clock_gettime(CLOCK_REALTIME, &ts);
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if (err < 0)
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return (LIBUSB_ERROR_OTHER);
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ts.tv_sec = tv->tv_sec;
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ts.tv_nsec = tv->tv_usec * 1000;
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if (ts.tv_nsec >= 1000000000) {
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ts.tv_nsec -= 1000000000;
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ts.tv_sec++;
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}
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err = pthread_cond_timedwait(&ctx->ctx_cond,
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&ctx->ctx_lock, &ts);
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if (err == ETIMEDOUT)
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return (1);
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return (0);
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}
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int
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libusb_handle_events_timeout(libusb_context *ctx, struct timeval *tv)
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{
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int err;
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ctx = GET_CONTEXT(ctx);
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DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout enter");
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libusb_lock_events(ctx);
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err = libusb_handle_events_locked(ctx, tv);
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libusb_unlock_events(ctx);
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DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout leave");
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return (err);
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}
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int
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libusb_handle_events(libusb_context *ctx)
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{
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return (libusb_handle_events_timeout(ctx, NULL));
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}
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int
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libusb_handle_events_locked(libusb_context *ctx, struct timeval *tv)
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{
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int err;
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ctx = GET_CONTEXT(ctx);
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if (libusb_event_handling_ok(ctx)) {
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err = libusb10_handle_events_sub(ctx, tv);
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} else {
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libusb_wait_for_event(ctx, tv);
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err = 0;
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}
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return (err);
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}
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int
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libusb_get_next_timeout(libusb_context *ctx, struct timeval *tv)
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{
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/* all timeouts are currently being done by the kernel */
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timerclear(tv);
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return (0);
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}
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void
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libusb_set_pollfd_notifiers(libusb_context *ctx,
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libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb,
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void *user_data)
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{
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ctx = GET_CONTEXT(ctx);
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ctx->fd_added_cb = added_cb;
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ctx->fd_removed_cb = removed_cb;
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ctx->fd_cb_user_data = user_data;
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}
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struct libusb_pollfd **
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libusb_get_pollfds(libusb_context *ctx)
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{
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struct libusb_super_pollfd *pollfd;
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libusb_pollfd **ret;
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int i;
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ctx = GET_CONTEXT(ctx);
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CTX_LOCK(ctx);
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i = 0;
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TAILQ_FOREACH(pollfd, &ctx->pollfds, entry)
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i++;
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ret = calloc(i + 1, sizeof(struct libusb_pollfd *));
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if (ret == NULL)
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goto done;
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i = 0;
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TAILQ_FOREACH(pollfd, &ctx->pollfds, entry)
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ret[i++] = &pollfd->pollfd;
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ret[i] = NULL;
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done:
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CTX_UNLOCK(ctx);
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return (ret);
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}
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/* Synchronous device I/O */
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int
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libusb_control_transfer(libusb_device_handle *devh,
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uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
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uint8_t *data, uint16_t wLength, unsigned int timeout)
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{
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struct LIBUSB20_CONTROL_SETUP_DECODED req;
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int err;
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uint16_t actlen;
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if (devh == NULL)
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return (LIBUSB_ERROR_INVALID_PARAM);
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if ((wLength != 0) && (data == NULL))
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return (LIBUSB_ERROR_INVALID_PARAM);
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LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req);
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req.bmRequestType = bmRequestType;
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req.bRequest = bRequest;
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req.wValue = wValue;
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req.wIndex = wIndex;
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req.wLength = wLength;
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err = libusb20_dev_request_sync(devh, &req, data,
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&actlen, timeout, 0);
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if (err == LIBUSB20_ERROR_PIPE)
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return (LIBUSB_ERROR_PIPE);
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else if (err == LIBUSB20_ERROR_TIMEOUT)
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return (LIBUSB_ERROR_TIMEOUT);
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else if (err)
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return (LIBUSB_ERROR_NO_DEVICE);
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return (actlen);
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}
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static void
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libusb10_do_transfer_cb(struct libusb_transfer *transfer)
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{
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libusb_context *ctx;
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int *pdone;
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ctx = GET_CONTEXT(NULL);
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DPRINTF(ctx, LIBUSB_DEBUG_TRANSFER, "sync I/O done");
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pdone = transfer->user_data;
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*pdone = 1;
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}
|
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|
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/*
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|
* TODO: Replace the following function. Allocating and freeing on a
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* per-transfer basis is slow. --HPS
|
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*/
|
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static int
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libusb10_do_transfer(libusb_device_handle *devh,
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uint8_t endpoint, uint8_t *data, int length,
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int *transferred, unsigned int timeout, int type)
|
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{
|
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libusb_context *ctx;
|
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struct libusb_transfer *xfer;
|
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volatile int complet;
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int ret;
|
|
|
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if (devh == NULL)
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return (LIBUSB_ERROR_INVALID_PARAM);
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|
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if ((length != 0) && (data == NULL))
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return (LIBUSB_ERROR_INVALID_PARAM);
|
|
|
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xfer = libusb_alloc_transfer(0);
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if (xfer == NULL)
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return (LIBUSB_ERROR_NO_MEM);
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|
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ctx = libusb_get_device(devh)->ctx;
|
|
|
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xfer->dev_handle = devh;
|
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xfer->endpoint = endpoint;
|
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xfer->type = type;
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xfer->timeout = timeout;
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xfer->buffer = data;
|
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xfer->length = length;
|
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xfer->user_data = (void *)&complet;
|
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xfer->callback = libusb10_do_transfer_cb;
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complet = 0;
|
|
|
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if ((ret = libusb_submit_transfer(xfer)) < 0) {
|
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libusb_free_transfer(xfer);
|
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return (ret);
|
|
}
|
|
while (complet == 0) {
|
|
if ((ret = libusb_handle_events(ctx)) < 0) {
|
|
libusb_cancel_transfer(xfer);
|
|
usleep(1000); /* nice it */
|
|
}
|
|
}
|
|
|
|
*transferred = xfer->actual_length;
|
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|
|
switch (xfer->status) {
|
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case LIBUSB_TRANSFER_COMPLETED:
|
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ret = 0;
|
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break;
|
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case LIBUSB_TRANSFER_TIMED_OUT:
|
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ret = LIBUSB_ERROR_TIMEOUT;
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break;
|
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case LIBUSB_TRANSFER_OVERFLOW:
|
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ret = LIBUSB_ERROR_OVERFLOW;
|
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break;
|
|
case LIBUSB_TRANSFER_STALL:
|
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ret = LIBUSB_ERROR_PIPE;
|
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break;
|
|
case LIBUSB_TRANSFER_NO_DEVICE:
|
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ret = LIBUSB_ERROR_NO_DEVICE;
|
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break;
|
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default:
|
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ret = LIBUSB_ERROR_OTHER;
|
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break;
|
|
}
|
|
|
|
libusb_free_transfer(xfer);
|
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return (ret);
|
|
}
|
|
|
|
int
|
|
libusb_bulk_transfer(libusb_device_handle *devh,
|
|
uint8_t endpoint, uint8_t *data, int length,
|
|
int *transferred, unsigned int timeout)
|
|
{
|
|
libusb_context *ctx;
|
|
int ret;
|
|
|
|
ctx = GET_CONTEXT(NULL);
|
|
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer enter");
|
|
|
|
ret = libusb10_do_transfer(devh, endpoint, data, length, transferred,
|
|
timeout, LIBUSB_TRANSFER_TYPE_BULK);
|
|
|
|
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer leave");
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
libusb_interrupt_transfer(libusb_device_handle *devh,
|
|
uint8_t endpoint, uint8_t *data, int length,
|
|
int *transferred, unsigned int timeout)
|
|
{
|
|
libusb_context *ctx;
|
|
int ret;
|
|
|
|
ctx = GET_CONTEXT(NULL);
|
|
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer enter");
|
|
|
|
ret = libusb10_do_transfer(devh, endpoint, data, length, transferred,
|
|
timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT);
|
|
|
|
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer leave");
|
|
return (ret);
|
|
}
|
|
|
|
uint8_t *
|
|
libusb_get_iso_packet_buffer(struct libusb_transfer *transfer, uint32_t index)
|
|
{
|
|
uint8_t *ptr;
|
|
uint32_t n;
|
|
|
|
if (transfer->num_iso_packets < 0)
|
|
return (NULL);
|
|
|
|
if (index >= (uint32_t)transfer->num_iso_packets)
|
|
return (NULL);
|
|
|
|
ptr = transfer->buffer;
|
|
if (ptr == NULL)
|
|
return (NULL);
|
|
|
|
for (n = 0; n != index; n++) {
|
|
ptr += transfer->iso_packet_desc[n].length;
|
|
}
|
|
return (ptr);
|
|
}
|
|
|
|
uint8_t *
|
|
libusb_get_iso_packet_buffer_simple(struct libusb_transfer *transfer, uint32_t index)
|
|
{
|
|
uint8_t *ptr;
|
|
|
|
if (transfer->num_iso_packets < 0)
|
|
return (NULL);
|
|
|
|
if (index >= (uint32_t)transfer->num_iso_packets)
|
|
return (NULL);
|
|
|
|
ptr = transfer->buffer;
|
|
if (ptr == NULL)
|
|
return (NULL);
|
|
|
|
ptr += transfer->iso_packet_desc[0].length * index;
|
|
|
|
return (ptr);
|
|
}
|
|
|
|
void
|
|
libusb_set_iso_packet_lengths(struct libusb_transfer *transfer, uint32_t length)
|
|
{
|
|
int n;
|
|
|
|
if (transfer->num_iso_packets < 0)
|
|
return;
|
|
|
|
for (n = 0; n != transfer->num_iso_packets; n++)
|
|
transfer->iso_packet_desc[n].length = length;
|
|
}
|
|
|
|
uint8_t *
|
|
libusb_control_transfer_get_data(struct libusb_transfer *transfer)
|
|
{
|
|
if (transfer->buffer == NULL)
|
|
return (NULL);
|
|
|
|
return (transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE);
|
|
}
|
|
|
|
struct libusb_control_setup *
|
|
libusb_control_transfer_get_setup(struct libusb_transfer *transfer)
|
|
{
|
|
return ((struct libusb_control_setup *)transfer->buffer);
|
|
}
|
|
|
|
void
|
|
libusb_fill_control_setup(uint8_t *buf, uint8_t bmRequestType,
|
|
uint8_t bRequest, uint16_t wValue,
|
|
uint16_t wIndex, uint16_t wLength)
|
|
{
|
|
struct libusb_control_setup *req = (struct libusb_control_setup *)buf;
|
|
|
|
/* The alignment is OK for all fields below. */
|
|
req->bmRequestType = bmRequestType;
|
|
req->bRequest = bRequest;
|
|
req->wValue = htole16(wValue);
|
|
req->wIndex = htole16(wIndex);
|
|
req->wLength = htole16(wLength);
|
|
}
|
|
|
|
void
|
|
libusb_fill_control_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *devh, uint8_t *buf,
|
|
libusb_transfer_cb_fn callback, void *user_data,
|
|
uint32_t timeout)
|
|
{
|
|
struct libusb_control_setup *setup = (struct libusb_control_setup *)buf;
|
|
|
|
transfer->dev_handle = devh;
|
|
transfer->endpoint = 0;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buf;
|
|
if (setup != NULL)
|
|
transfer->length = LIBUSB_CONTROL_SETUP_SIZE
|
|
+ le16toh(setup->wLength);
|
|
else
|
|
transfer->length = 0;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
|
|
}
|
|
|
|
void
|
|
libusb_fill_bulk_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf,
|
|
int length, libusb_transfer_cb_fn callback, void *user_data,
|
|
uint32_t timeout)
|
|
{
|
|
transfer->dev_handle = devh;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buf;
|
|
transfer->length = length;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
void
|
|
libusb_fill_interrupt_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf,
|
|
int length, libusb_transfer_cb_fn callback, void *user_data,
|
|
uint32_t timeout)
|
|
{
|
|
transfer->dev_handle = devh;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buf;
|
|
transfer->length = length;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|
|
void
|
|
libusb_fill_iso_transfer(struct libusb_transfer *transfer,
|
|
libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf,
|
|
int length, int npacket, libusb_transfer_cb_fn callback,
|
|
void *user_data, uint32_t timeout)
|
|
{
|
|
transfer->dev_handle = devh;
|
|
transfer->endpoint = endpoint;
|
|
transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS;
|
|
transfer->timeout = timeout;
|
|
transfer->buffer = buf;
|
|
transfer->length = length;
|
|
transfer->num_iso_packets = npacket;
|
|
transfer->user_data = user_data;
|
|
transfer->callback = callback;
|
|
}
|
|
|