DosReallocSeg

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

Syntax
DosReallocSeg (Size, Selector)

Parameters

 * Size (USHORT) - input: New requested segment size (in bytes). A value of 0 indicates 65536 bytes.
 * Selector (SEL) - input: Segment to be resized.

Return Code

 * rc (USHORT) - return:Return code descriptions are:
 * 0 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).

C

 * 1) define INCL_DOSMEMMGR

USHORT rc = DosReallocSeg(Size, Selector);

USHORT Size;          /* New size requested in bytes */ SEL    Selector;      /* Selector */

USHORT rc;            /* return code */ 

MASM
 EXTRN DosReallocSeg:FAR INCL_DOSMEMMGR     EQU 1

PUSH  WORD    Size          ;New size requested in bytes PUSH  WORD    Selector      ;Selector CALL  DosReallocSeg

Returns WORD 