Preliminary User Guide, Rev. 2 | USS-720 |
February 1999 | USB Device Driver |
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4 I/O Control Codes (continued)
4.6 IOCTL_ABORT_PIPE
IOCTL_ABORT_PIPE cancels any pending transfers for the specified pipe. The pipe state and endpoint state are unaffected. Details regarding parameters and error codes follow.
4.6.1 Parameters
lpInBuffer—Points to a buffer that contains a single byte that specifies one of the following values:
Value | Description |
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BULK_OUT_PIPE | Bulk Out pipe. |
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BULK_IN_PIPE | Bulk In pipe. |
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INTERRUPT_PIPE | Interrupt pipe. |
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nInBufferSize—Specifies the size (in bytes) of the buffer pointed to by lpInBuffer. For this operation, this value should be 1.
lpOutBuffer—Points to an output buffer. Not used with this operation. Set to NULL.
nOutBufferSize—Specifies the size (in bytes) of the buffer pointed to by lpOutBuffer. Not used with this operation. Set to zero.
lpBytesReturned—Points to a DWORD that receives the actual size (in bytes) of the data stored into lpOutBuffer. Not used with this operation.
4.6.2 Notes
None.
4.6.3 Error Codes
ERROR_INVALID_PIPE_INDEX—Specified pipe is invalid for this device instance or invalid for the current alter- nate interface setting.
STATUS_INVALID_PARAMETER—nInBufferSize cannot be zero.
STATUS_INSUFFICIENT_RESOURCES—Not enough memory to allocate a request to abort the pipe on this device instance.
Lucent Technologies Inc. | 7-15 |
