tree c500604d062f8d667f1fa66bc3446878e651e94e
parent 851ff404003a26c1e3428b9a1332227173cc124b
author Chris Dickens <christopher.a.dickens@gmail.com> 1600204500 -0700
committer Chris Dickens <christopher.a.dickens@gmail.com> 1605046392 -0800

examples: Enable all examples to build on all platforms

Prior to this change, the dpfp and sam3u_benchmark examples were only
built on POSIX platforms due to a dependency on sigaction(). Furthermore
the dpfp_threaded example only worked with POSIX threads.

Lift this limitation by breaking the dependence on sigaction(). Also
provide a minimal threading abstraction so that dpfp_threaded can be
built on Windows as well.

Also merge the sources for dpfp and dpfp_threaded. The only difference
between the two is how libusb's event handling functions are called and
this can be easily handled within a single source file.

Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>