Index for Section 9r

Alphabetical listing for D

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DELAY(9r)
NAME
  DELAY - General: Delays the calling routine a specified number of
  microseconds

SYNOPSIS
  void DELAY(
	  int Specifies n );

ARGUMENTS
  Specifies n
      Specifies the number of microseconds for the calling process to spin.

DESCRIPTION
  The DELAY routine delays the calling routine a specified number of
  microseconds.	 DELAY spins, waiting for the specified number of
  microseconds to pass before continuing execution.

  For example, the following code results in a 10000-microsecond (10-
  millisecond) delay:

	.
	.
	.
	DELAY(10000);
	.
	.
	.

  The range of delays is system dependent, due to its relation to the
  granularity of the system clock. The system defines the number of clock
  ticks per second in the hz variable. Specifying any value smaller than 1 Hz
  to the DELAY routine results in an unpredictable delay. For any delay
  value, the actual delay may vary by plus or minus one clock tick.

  Using the DELAY routine is discouraged because the processor will be
  consumed for the specified time interval and therefore is unavailable to
  service other processes. In cases where kernel modules need timing
  mechanisms, you should use the sleep and timeout routines instead of the
  DELAY routine.  The most common usage of the DELAY routine is in the system
  boot path. Using DELAY in the boot path is often acceptable because there
  are no other processes in contention for the processor.

RETURN VALUES
  None

SEE ALSO
  Routines: sleep(9r), timeout(9r)

Index for Section 9r

Alphabetical listing for D

Top of page