3/28/2023 0 Comments Buffering in semaphor![]() Here, producers and consumers are working at different rates. Some languages like Erlang nominally support unbounded buffering as the default, but the limit imposed by the operating system is always there. In aiochan, buffering is always bounded: you have to decide at the onset how much pending stuff stored in your buffer you can tolerate. However, to reduce clutter, and to improve performance, Chan has built-in support for buffer. ![]() You can do this as an exercise (hint: use select). ![]() In principle, buffering can be done without any further support from the library: we can have a pair of channels, ch_in and ch_out, acting as one, and a coroutine busy working in the background, promptly getting values from ch_in whenever they come in and store them onto some data structure, and at the same time feeding values to getters of ch_out whenever they come by. This behaviour where we further decouple put and get operations in time is called buffering. However, in practice, it is sometimes necessary to relax this requirement a little bit so that puts can complete immediately even when no one is there to get, and if previous puts are available, a get can complete without a put sitting there waiting. ![]() Channels are used as meating points: a pair of put/get operations can only be completed when both involved parties are present at the same time. ![]()
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