SCO OpenServer

suspend(D3oddi)

suspend -- delay running processes

Synopsis

void suspend(unsigned int microsecs);

Description

The suspend( ) function delays the running process by microsecs microseconds. It causes the processor to busy-wait until the required time interval has elapsed.

Arguments

microsecs: Number of microseconds to delay execution.

Return values

None.

Usage

suspend( ) implements a timed ``buzz loop'', which can seriously degrade system performance. suspend( ) should be used only when the delay(D3oddi) function cannot be called.

The processor spl level is unchanged so interrupts are serviced as normal. If an interrupt fielded by the spinning processor takes longer than 20 milliseconds to complete, the delay time will be adversely affected.

Context and synchronization

All contexts.

Hardware applicability

All

Version applicability

oddi: 1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp, 6, 6mp

SVR5 DDI compatibility

drv_usecwait(D3) provides similar functionality for DDI drivers.

References

delay(D3oddi), drv_usecwait(D3)

``Delays and busy-waits'' in HDK Technical Reference