DosGetShrSeg

This call accesses a shared memory segment previously allocated by another process.

DosGetShrSeg

(Name, Selector)

Name (PSZ) - input

Address of the name string associated with the shared memory segment to be accessed. The name is an ASCIIZ string in the format of an OS/2 filename in a subdirectory called \SHAREMEM\, for example, \SHAREMEM\PUBLIC.DAT.
Selector (PSEL) - output
Address of the selector for the shared memory segment.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 2
  ERROR_FILE_NOT_FOUND
  4
  ERROR_TOO_MANY_OPEN_FILES
  123
  ERROR_INVALID_NAME
  Remarks

  DosGetShrSeg provides access to a named shared segment allocated by another process with DosAllocShrSeg. The selector returned by DosGetShrSeg is the same as the one returned by the DosAllocShrSeg call.

  A usage count is maintained for a named shared segment. Issuing DosGetShrSeg increments the count, and issuing DosFreeSeg decrements the count. When the usage count equals zero, the named shared segment is deallocated. Once the segment has been deallocated, it must be reinitialized by a call to DosAllocShrSeg.

  To access shared memory that is allocated by another process with DosAllocSeg and DosAllocHuge requests, a process issues DosGetSeg.

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