cvs commit: src/sys/sys systm.h

[John Birrell]

jb          2006-08-04 23:31:16 UTC

  FreeBSD src repository

  Modified files:
    sys/sys              systm.h 
  Log:
  Add a type definition for the cyclic timer callback function.
  
  The cyclic timer is a high-resolution timer allows timeouts at nanosecond
  intervals where hardware support is available. Typically on i386 there
  is no HPET (high performance event timer) like the one Intel started
  specifying some time in 2004, so the best that tye cyclic timer subsystem
  can do is run at Hz.
  
  The cyclic timer code itself is ported from OpenSolaris and is covered
  by the CDDL, so it is only loaded as a module. This function type definition
  is used in machine-dependent code to provide a hook for the module to
  register it's callback function.
  
  Revision  Changes    Path
  1.242     +6 -0      src/sys/sys/systm.h