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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . S O C K E T S . T H I N --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 2002-2012, 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. --
+-- --
+------------------------------------------------------------------------------
+
+-- This package provides a target dependent thin interface to the sockets
+-- layer for use by the GNAT.Sockets package (g-socket.ads). This package
+-- should not be directly with'ed by an applications program.
+
+-- This is the Alpha/VMS version
+
+with Interfaces.C.Strings;
+
+with GNAT.OS_Lib;
+with GNAT.Sockets.Thin_Common;
+
+with System;
+with System.CRTL;
+
+package GNAT.Sockets.Thin is
+
+ -- ??? more comments needed ???
+
+ use Thin_Common;
+
+ package C renames Interfaces.C;
+
+ use type System.CRTL.ssize_t;
+
+ function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
+ -- Returns last socket error number
+
+ procedure Set_Socket_Errno (Errno : Integer) renames GNAT.OS_Lib.Set_Errno;
+ -- Set last socket error number
+
+ function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
+ -- Returns the error message string for the error number Errno. If Errno is
+ -- not known, returns "Unknown system error".
+
+ function Host_Errno return Integer;
+ pragma Import (C, Host_Errno, "__gnat_get_h_errno");
+ -- Returns last host error number
+
+ package Host_Error_Messages is
+
+ function Host_Error_Message
+ (H_Errno : Integer) return C.Strings.chars_ptr;
+ -- Returns the error message string for the host error number H_Errno.
+ -- If H_Errno is not known, returns "Unknown system error".
+
+ end Host_Error_Messages;
+
+ --------------------------------
+ -- Standard library functions --
+ --------------------------------
+
+ function C_Accept
+ (S : C.int;
+ Addr : System.Address;
+ Addrlen : not null access C.int) return C.int;
+
+ function C_Bind
+ (S : C.int;
+ Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Close
+ (Fd : C.int) return C.int;
+
+ function C_Connect
+ (S : C.int;
+ Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Gethostname
+ (Name : System.Address;
+ Namelen : C.int) return C.int;
+
+ function C_Getpeername
+ (S : C.int;
+ Name : System.Address;
+ Namelen : not null access C.int) return C.int;
+
+ function C_Getsockname
+ (S : C.int;
+ Name : System.Address;
+ Namelen : not null access C.int) return C.int;
+
+ function C_Getsockopt
+ (S : C.int;
+ Level : C.int;
+ Optname : C.int;
+ Optval : System.Address;
+ Optlen : not null access C.int) return C.int;
+
+ function Socket_Ioctl
+ (S : C.int;
+ Req : SOSC.IOCTL_Req_T;
+ Arg : access C.int) return C.int;
+
+ function C_Listen
+ (S : C.int;
+ Backlog : C.int) return C.int;
+
+ function C_Recv
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int) return C.int;
+
+ function C_Recvfrom
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int;
+ From : System.Address;
+ Fromlen : not null access C.int) return C.int;
+
+ function C_Recvmsg
+ (S : C.int;
+ Msg : System.Address;
+ Flags : C.int) return System.CRTL.ssize_t;
+
+ function C_Select
+ (Nfds : C.int;
+ Readfds : access Fd_Set;
+ Writefds : access Fd_Set;
+ Exceptfds : access Fd_Set;
+ Timeout : Timeval_Access) return C.int;
+
+ function C_Sendmsg
+ (S : C.int;
+ Msg : System.Address;
+ Flags : C.int) return System.CRTL.ssize_t;
+
+ function C_Sendto
+ (S : C.int;
+ Msg : System.Address;
+ Len : C.int;
+ Flags : C.int;
+ To : System.Address;
+ Tolen : C.int) return C.int;
+
+ function C_Setsockopt
+ (S : C.int;
+ Level : C.int;
+ Optname : C.int;
+ Optval : System.Address;
+ Optlen : C.int) return C.int;
+
+ function C_Shutdown
+ (S : C.int;
+ How : C.int) return C.int;
+
+ function C_Socket
+ (Domain : C.int;
+ Typ : C.int;
+ Protocol : C.int) return C.int;
+
+ function C_System
+ (Command : System.Address) return C.int;
+
+ -------------------------------------------------------
+ -- Signalling file descriptors for selector abortion --
+ -------------------------------------------------------
+
+ package Signalling_Fds is
+
+ function Create (Fds : not null access Fd_Pair) return C.int;
+ pragma Convention (C, Create);
+ -- Create a pair of connected descriptors suitable for use with C_Select
+ -- (used for signalling in Selector objects).
+
+ function Read (Rsig : C.int) return C.int;
+ pragma Convention (C, Read);
+ -- Read one byte of data from rsig, the read end of a pair of signalling
+ -- fds created by Create_Signalling_Fds.
+
+ function Write (Wsig : C.int) return C.int;
+ pragma Convention (C, Write);
+ -- Write one byte of data to wsig, the write end of a pair of signalling
+ -- fds created by Create_Signalling_Fds.
+
+ procedure Close (Sig : C.int);
+ pragma Convention (C, Close);
+ -- Close one end of a pair of signalling fds (ignoring any error)
+
+ end Signalling_Fds;
+
+ -------------------------------------------
+ -- Nonreentrant network databases access --
+ -------------------------------------------
+
+ function Nonreentrant_Gethostbyname
+ (Name : C.char_array) return Hostent_Access;
+
+ function Nonreentrant_Gethostbyaddr
+ (Addr : System.Address;
+ Addr_Len : C.int;
+ Addr_Type : C.int) return Hostent_Access;
+
+ function Nonreentrant_Getservbyname
+ (Name : C.char_array;
+ Proto : C.char_array) return Servent_Access;
+
+ function Nonreentrant_Getservbyport
+ (Port : C.int;
+ Proto : C.char_array) return Servent_Access;
+
+ procedure Initialize;
+ procedure Finalize;
+
+private
+
+ pragma Import (C, C_Bind, "DECC$BIND");
+ pragma Import (C, C_Close, "DECC$CLOSE");
+ pragma Import (C, C_Gethostname, "DECC$GETHOSTNAME");
+ pragma Import (C, C_Getpeername, "DECC$GETPEERNAME");
+ pragma Import (C, C_Getsockname, "DECC$GETSOCKNAME");
+ pragma Import (C, C_Getsockopt, "DECC$GETSOCKOPT");
+ pragma Import (C, C_Listen, "DECC$LISTEN");
+ pragma Import (C, C_Select, "DECC$SELECT");
+ pragma Import (C, C_Setsockopt, "DECC$SETSOCKOPT");
+ pragma Import (C, C_Shutdown, "DECC$SHUTDOWN");
+ pragma Import (C, C_System, "DECC$SYSTEM");
+
+ pragma Import (C, Nonreentrant_Gethostbyname, "DECC$GETHOSTBYNAME");
+ pragma Import (C, Nonreentrant_Gethostbyaddr, "DECC$GETHOSTBYADDR");
+ pragma Import (C, Nonreentrant_Getservbyname, "DECC$GETSERVBYNAME");
+ pragma Import (C, Nonreentrant_Getservbyport, "DECC$GETSERVBYPORT");
+
+end GNAT.Sockets.Thin;