Stores the instant in time that @datetime represents into @tv.
The time contained in a #GTimeVal is always stored in the form of
seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the time
zone associated with @datetime.
On systems where 'long' is 32bit (ie: all 32bit systems and all
Windows systems), a #GTimeVal is incapable of storing the entire
range of values that #GDateTime is capable of expressing. On those
systems, this function returns %FALSE to indicate that the time is
out of range.
On systems where 'long' is 64bit, this function never fails.
Stores the instant in time that @datetime represents into @tv.
The time contained in a #GTimeVal is always stored in the form of seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the time zone associated with @datetime.
On systems where 'long' is 32bit (ie: all 32bit systems and all Windows systems), a #GTimeVal is incapable of storing the entire range of values that #GDateTime is capable of expressing. On those systems, this function returns %FALSE to indicate that the time is out of range.
On systems where 'long' is 64bit, this function never fails.