DosReallocSeg

This call reallocates a segment after discard or changes the size of a segment already allocated.

DosReallocSeg

(Size, Selector)

Size (USHORT) - input

New requested segment size (in bytes). A value of 0 indicates 65536 bytes.
Selector (SEL) - input
Segment to be resized.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 5
  ERROR_ACCESS_DENIED
  8
  ERROR_NOT_ENOUGH_MEMORY
  Remarks

  DosReallocSeg is called to change the size of an unshared or shared segment allocated with a DosAllocSeg request.

  Normally, segments allocated as shared (AllocFlags bits 0 and 1 were set) cannot be decreased in size. However, if AllocFlags bit 3 was also set, the shared segment's size can be decreased.

  DosReallocSeg is also called to reallocate a segment allocated as discardable (AllocFlags bit 2 set) after the segment is discarded by the system. The call to DosReallocSeg automatically locks the segment for access by the caller, the same as if a DosLockSeg had been issued.

  Note: This request may be issued from privilege level 2 or 3, and the segment being resized can be either a privilege level 2 or privilege level 3 segment.

  To change the size of huge memory allocated by DosAllocHuge, see DosReallocHuge.

  
  Family API Considerations

  Some options operate differently in the DOS mode than in the OS/2 mode. Therefore, the following restriction applies to DosReallocSeg when coding for the DOS mode. The requested Size value is rounded up to the next paragraph (16-byte).

  ---

  [Back: DosReallocHuge]
  [Next: DosResumeThread]