54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// Copyright 2013 Google Inc. All rights reserved.
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// Copyright 2016 the gousb Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package usb
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/*
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#include <libusb-1.0/libusb.h>
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*/
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import "C"
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import (
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"log"
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"time"
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"unsafe"
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)
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//export iso_callback
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func iso_callback(cptr unsafe.Pointer) {
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ch := *(*chan struct{})(cptr)
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close(ch)
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}
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func isochronous_xfer(e *endpoint, buf []byte, timeout time.Duration) (int, error) {
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t, err := e.newUSBTransfer(TRANSFER_TYPE_ISOCHRONOUS, buf)
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if err != nil {
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return 0, err
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}
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defer t.free()
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if err := t.submit(timeout); err != nil {
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log.Printf("iso: xfer failed to submit: %s", err)
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return 0, err
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}
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n, err := t.wait(buf)
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if err != nil {
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log.Printf("iso: xfer failed: %s", err)
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return 0, err
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}
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return n, err
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}
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