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All of the FFTW threads code is located in the threads
d@0: subdirectory of the FFTW package. On Unix systems, the FFTW threads
d@0: libraries and header files can be automatically configured, compiled,
d@0: and installed along with the uniprocessor FFTW libraries simply by
d@0: including --enable-threads in the flags to the configure
d@0: script (see Installation on Unix).
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d@0: The threads routines require your operating system to have some sort
d@0: of shared-memory threads support. Specifically, the FFTW threads
d@0: package works with POSIX threads (available on most Unix variants,
d@0: from GNU/Linux to MacOS X) and Win32 threads. We also support using
d@0: OpenMP, enabled by using
d@0: --enable-openmp (instead of --enable-threads).
d@0: (This may be useful if you are employing that sort of directive in
d@0: your own code, in order to minimize conflicts.) If you have a
d@0: shared-memory machine that uses a different threads API, it should be
d@0: a simple matter of programming to include support for it; see the file
d@0: threads/threads.c for more detail.
d@0:
d@0:
Ideally, of course, you should also have multiple processors in order to d@0: get any benefit from the threaded transforms. d@0: d@0: d@0: d@0: