gen/FreeBSD/usleep.3.patch

   1 --- usleep.3.orig       2009-11-07 14:51:38.000000000 -0800
   2 +++ usleep.3    2009-11-07 14:51:40.000000000 -0800
   3 @@ -33,30 +33,34 @@
   4  .Os
   5  .Sh NAME
   6  .Nm usleep
   7 -.Nd suspend process execution for an interval measured in microseconds
   8 +.Nd suspend thread execution for an interval measured in microseconds
   9  .Sh LIBRARY
  10  .Lb libc
  11  .Sh SYNOPSIS
  12  .In unistd.h
  13  .Ft int
  14 -.Fn usleep "useconds_t microseconds"
  15 +.Fo usleep
  16 +.Fa "useconds_t useconds"
  17 +.Fc
  18  .Sh DESCRIPTION
  19  The
  20  .Fn usleep
  21 -function suspends execution of the calling process until either
  22 -.Fa microseconds
  23 -microseconds have elapsed or a signal is delivered to the process and its
  24 -action is to invoke a signal-catching function or to terminate the
  25 -process.
  26 -System activity may lengthen the sleep by an indeterminate amount.
  27 +function suspends execution of the calling thread until either
  28 +.Fa useconds
  29 +microseconds have elapsed
  30 +or a signal is delivered to the thread whose action
  31 +is to invoke a signal-catching function
  32 +or to terminate the thread or process.
  33 +The actual time slept may be longer, due to system latencies
  34 +and possible limitations in the timer resolution of the hardware.
  35  .Pp
  36 -This function is implemented using
  37 -.Xr nanosleep 2
  38 +This function is implemented, using
  39 +.Xr nanosleep 2 ,
  40  by pausing for
  41 -.Fa microseconds
  42 +.Fa useconds
  43  microseconds or until a signal occurs.
  44  Consequently, in this implementation,
  45 -sleeping has no effect on the state of process timers,
  46 +sleeping has no effect on the state of process timers
  47  and there is no special handling for SIGALRM.
  48  .Sh RETURN VALUES
  49  .Rv -std usleep