57 lines
3.2 KiB
Ada
57 lines
3.2 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- G N A T . S O C K E T S . P O L L . W A I T --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2020, AdaCore --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Wait implementation on top of native poll call
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--
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-- This submodule can be used on systems where poll system call is natively
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-- supported. Microsoft Windows supports WSAPoll system call from Vista
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-- version and this submodule can be used on such Windows versions too, the
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-- System.OS_Constants.Poll_Linkname constant defines appropriate link name
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-- for Windows. But we do not use WSAPoll in GNAT.Sockets.Poll implementation
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-- for now because it is much slower than select system call, at least in
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-- Windows version 10.0.18363.1016.
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separate (GNAT.Sockets.Poll)
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procedure Wait
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(Fds : in out Set; Timeout : Interfaces.C.int; Result : out Integer)
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is
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function Poll
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(Fds : Poll_Set;
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Nfds : nfds_t;
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Timeout : Interfaces.C.int) return Integer
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with Import, Convention => Stdcall, External_Name => SOC.Poll_Linkname;
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begin
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Result := Poll (Fds.Fds, nfds_t (Fds.Length), Timeout);
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end Wait;
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