NAME
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time, nsec – time in seconds and nanoseconds since epoch |
SYNOPSIS
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#include <u.h> #include <libc.h>
long time(long *tp)
vlong nsec(void) |
DESCRIPTION
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Both time and nsec return the time since the epoch 00:00:00 GMT,
Jan. 1, 1970. The return value of the former is in seconds and
the latter in nanoseconds. For time, if tp is not zero then *tp
is also set to the answer. Times from time should be stored in and treated as ulongs; this extends the range of valid times into the year 2106. Time simply calls nsec and returns the value divided by 1000000000.
Nsec is a system call. Previous implementations read /dev/bintime,
opening that file when first called, and maintaining a static
file descriptor; however, the maintenance of file descriptors
in the face of process forks is overly complex and prone to error. |
SOURCE
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/sys/src/libc/9sys/time.c /sys/src/libc/9syscall |
SEE ALSO
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cputime(2), cons(3) |
DIAGNOSTICS
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Sets errstr. |