[project @ 2003-07-16 17:40:38 by sof]

[project @ 2003-07-16 17:40:38 by sof]
- change prototype of async proc calls to

      typedef int (*DoProcProc)(void *param);

  i.e., have the proc return a result. Turned out that almost all
  uses of the primop ended up encoding a result via their 'param'.

- when adding new I/O requests, shorten the time the IOManager
  lock is held. Helps to keep down the size of the thread pool.