------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G N A T . S O C K E T S . P O L L . W A I T -- -- -- -- B o d y -- -- -- -- Copyright (C) 2020-2024, AdaCore -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Wait implementation on top of native poll call -- -- This submodule can be used on systems where poll system call is natively -- supported. Microsoft Windows supports WSAPoll system call from Vista -- version and this submodule can be used on such Windows versions too, the -- System.OS_Constants.Poll_Linkname constant defines appropriate link name -- for Windows. But we do not use WSAPoll in GNAT.Sockets.Poll implementation -- for now because it is much slower than select system call, at least in -- Windows version 10.0.18363.1016. separate (GNAT.Sockets.Poll) procedure Wait (Fds : in out Set; Timeout : Interfaces.C.int; Result : out Integer) is function Poll (Fds : Poll_Set; Nfds : nfds_t; Timeout : Interfaces.C.int) return Integer with Import, Convention => Stdcall, External_Name => SOC.Poll_Linkname; begin Result := Poll (Fds.Fds, nfds_t (Fds.Length), Timeout); end Wait;