module Netsys_pollset_generic:Returns a good standard implementation of pollset for this platform. It will be good for cases where only a small to medium number of descriptors is watched (several hundred should be ok). It is no problem when the pollset lives only for a short time. Also, it is not strictly necessary to call thesig..end
dispose method after use.
On POSIX platforms, this returns a
Netsys_pollset_posix.poll_based_pollset.
On Win32, this returns Netsys_pollset_win32.pollset in single-threaded
programs, and a Netsys_pollset_win32.threaded_pollset in
multi-threaded programs. Note that Win32 restricts the number of
descriptors that can be watched per thread to 64. The threaded_pollset
version overcomes this limit, but it is only available if your
program is compiled for multi-threading. Because of this, it may be
useful to enable multi-threading for your program even when your code
does not make use of it otherwise.
val standard_pollset : unit -> Netsys_pollset.pollsetdispose method after use.
On POSIX platforms, this returns a
Netsys_pollset_posix.poll_based_pollset.
On Win32, this returns Netsys_pollset_win32.pollset in single-threaded
programs, and a Netsys_pollset_win32.threaded_pollset in
multi-threaded programs. Note that Win32 restricts the number of
descriptors that can be watched per thread to 64. The threaded_pollset
version overcomes this limit, but it is only available if your
program is compiled for multi-threading. Because of this, it may be
useful to enable multi-threading for your program even when your code
does not make use of it otherwise.
val performance_pollset : unit -> Netsys_pollset.pollsetdispose method is called after use.
Currently, this is the same as standard_pollset, because no better
implementations exist. In the future, performance_pollset will use
kernel-based polling on some OS ("epoll", "kqueue", "/dev/poll", etc.)
val select_emulation : Netsys_pollset.pollset ->
Unix.file_descr list ->
Unix.file_descr list ->
Unix.file_descr list ->
float -> Unix.file_descr list * Unix.file_descr list * Unix.file_descr listlet select = select_emulation pset: Returns a function with the
same meaning as Unix.select. It is emulated on top of pset.
Using the function is only recommended when the lists of file descriptors are short. Long lists impose a big performance penalty.
Unlike Unix.select the descriptors may be returned in any order.
