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------------------------------------------------------------------------------
-- --
-- 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) 2020-2023, 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 --
-- <http://www.gnu.org/licenses/>. --
-- --
-- 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 posix select call
with GNAT.Sockets.Poll.G_Wait;
separate (GNAT.Sockets.Poll)
procedure Wait
(Fds : in out Set; Timeout : Interfaces.C.int; Result : out Integer)
is
use Interfaces;
function Get_Max_FD return FD_Type;
-- Check is Max_FD is actual and correct it if necessary
type FD_Set_Type is array (0 .. Get_Max_FD / C.long'Size) of C.long
with Convention => C;
procedure Reset_Socket_Set (Set : in out FD_Set_Type);
-- Use own FD_ZERO routine because FD_Set_Type size depend on Fds.Max_FD
procedure Insert_Socket_In_Set (Set : in out FD_Set_Type; FD : FD_Type)
with Import, Convention => C,
External_Name => "__gnat_insert_socket_in_set";
function Is_Socket_In_Set (Set : FD_Set_Type; FD : FD_Type) return C.int
with Import, Convention => C,
External_Name => "__gnat_is_socket_in_set";
procedure Reset_Socket_Set (Set : in out FD_Set_Type) is
begin
Set := (others => 0);
end Reset_Socket_Set;
procedure Poll is new G_Wait
(FD_Set_Type, Reset_Socket_Set, Insert_Socket_In_Set, Is_Socket_In_Set);
----------------
-- Get_Max_FD --
----------------
function Get_Max_FD return FD_Type is
begin
if not Fds.Max_OK then
Fds.Max_FD := Fds.Fds (Fds.Fds'First).Socket;
for J in Fds.Fds'First + 1 .. Fds.Length loop
if Fds.Max_FD < Fds.Fds (J).Socket then
Fds.Max_FD := Fds.Fds (J).Socket;
end if;
end loop;
Fds.Max_OK := True;
end if;
return Fds.Max_FD;
end Get_Max_FD;
begin
Poll (Fds, Timeout, Result);
end Wait;
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