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来自「Algorithms for Image Processing and Comp」· 代码 · 共 26 行

@c ----------------------------------------------------------------------
@node usleep, process
@heading @code{usleep}
@subheading Syntax

@example
#include <osfcn.h>

unsigned usleep(unsigned usec);
@end example

@subheading Description

This function pauses the program for @var{usec} microseconds. 

@subheading Return Value

The number of unsleept microseconds (i.e. zero).

@subheading Example

@example
usleep(500000);
@end example