Proposed resolution:

This is resolved by n3191.

[ 2010-11-13 Batavia meeting: ]

This is resolved by adopting n3191. The original resolution is preserved for reference:

Make monotonic clocks mandatory.

Strike [time.clock.monotonic] p.2

2 The class monotonic_clock is conditionally supported.

Change [thread.req.timing] p.2 accordingly

The member functions whose names end in _for take an argument that specifies a relative time. Implementations should use a monotonic clock to measure time for these functions. [ Note: Implementations are not required to use a monotonic clock because such a clock may not be available. — end note ]

[ 2010-11-01 Daniel comments: ]

Paper n3128 addresses this issue by replacing monotonic_clock with steady_clock, which is mandatory.

Addresses CH-21

Monotonic clocks are generally easy to provide on all systems and are implicitely required by some of the library facilities anyway.