cpp-timers is an abstract BaseClock base class and three implementation classes:

• CpuClock uses the C function clock() to get the CPU time that the program has used since it started.

• WallClock uses the C function time() to get the current system time in seconds.

• RealtimeClock uses OS-specific functions to get the system time in nanoseconds. Linux and Apple OS X code are included.

The test program test_app tests the classes.