cvs commit: src/sys/kern uipc_socket.c

[Robert Watson]

rwatson     2008-10-05 21:05:20 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/kern             uipc_socket.c 
  Log:
  SVN rev 183633 on 2008-10-05 21:05:20Z by rwatson
  
  Merge r183512 from head to stable/7:
  
    Various cleanups for soreceive_dgram():
  
    - Update or remove comments that were left over from the original
      soreceive_generic() implementation.  Quite a few were misleading in the
      context of the new code.
    - Since soreceive_dgram() has a simpler structure, replace several gotos
      with a while loop making the invariants more clear.
    - In the blocking while loop, don't try to handle cases incompatible with
      the loop invariant (since m is always NULL, don't check for and handle
      non-NULL).
    - Don't drop and re-acquire the socket buffer lock unnecessarily after
      sbwait() returns, which may help reduce lock contention (etc).
    - Assume PR_ATOMIC since we assert it at the top of the function.
  
  Approved by:    re (gnn)
  
  Revision   Changes    Path
  1.302.2.8  +19 -58    src/sys/kern/uipc_socket.c