NAME

clock — determine processor time used

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <time.h>

clock_t
clock(void);

DESCRIPTION

The clock() function determines the amount of processor time used since the invocation of the calling process, measured in CLOCKS_PER_SECs.

RETURN VALUES

The clock() function returns the amount of time used unless an error occurs, in which case the return value is -1.

SEE ALSO

getrusage(2)

STANDARDS

The clock() function conforms to ANSI X3.159-1989 (“ANSI C89”).