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synopsis="GPIO, I2C, SPI, and PWM functions for the Raspberry Pi.";
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description="This package is a FFI wrapper around the bcm2835 library by Mike McCauley, it also includes a few utility functions for easier use of the imported functions.";
synopsis="Run IO operations asynchronously and wait for their results";
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description="This package provides a higher-level interface over\nthreads, in which an @Async a@ is a concurrent\nthread that will eventually deliver a value of\ntype @a@. The package provides ways to create\n@Async@ computations, wait for their results, and\ncancel them.\n\nUsing @Async@ is safer than using threads in two\nways:\n\n* When waiting for a thread to return a result,\nif the thread dies with an exception then the\ncaller must either re-throw the exception\n('wait') or handle it ('waitCatch'); the\nexception cannot be ignored.\n\n* The API makes it possible to build a tree of\nthreads that are automatically killed when\ntheir parent dies (see 'withAsync').";
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