cvs commit: src/sys/kern uipc_socket.c

[Robert Watson]

rwatson     2008-10-01 13:26:52 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             uipc_socket.c 
  Log:
  SVN rev 183512 on 2008-10-01 13:26:52Z by rwatson
  
  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.
  
  MFC after:      3 days
  
  Revision  Changes    Path
  1.316     +19 -58    src/sys/kern/uipc_socket.c