SG_REQ (Windows Embedded CE 6.0)
1/6/2010
This structure contains information that the FAT file system fills. The read and write IOCTLs use this structure.
Syntax
typedef struct _SG_REQ {
DWORD sr_start;
DWORD sr_num_sec;
DWORD sr_num_sg;
DWORD sr_status;
PFN_REQDONE sr_callback;
SG_BUF sr_sglist[1];
} SG_REQ, *PSG_REQ;
Members
- sr_start
The starting sector number relative to the beginning of the store.
- sr_num_sec
The number of sectors.
- sr_num_sg
Number of scatter or gather buffers, which is typically one. If sr_num_sg is greater than one, the block device driver should complete additional entries in the sr_sglist array.
- sr_status
Request status.
- sr_callback
Callback function for the request completion.
- sr_sglist
The first scatter/gather buffer.
Requirements
| Header | diskio.h |
| Windows Embedded CE | Windows CE 3.0 and later |
See Also
Reference
Block Driver Structures
IOCTL_DISK_READ
IOCTL_DISK_WRITE