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Diffstat (limited to 'gcc-4.4.3/gcc/ada/g-socthi-mingw.adb')
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1 files changed, 552 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/ada/g-socthi-mingw.adb b/gcc-4.4.3/gcc/ada/g-socthi-mingw.adb new file mode 100644 index 000000000..c853ce41e --- /dev/null +++ b/gcc-4.4.3/gcc/ada/g-socthi-mingw.adb @@ -0,0 +1,552 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T . S O C K E T S . T H I N -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2001-2008, 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- 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 version is for NT + +with Interfaces.C.Strings; use Interfaces.C.Strings; +with System; use System; + +package body GNAT.Sockets.Thin is + + use type C.unsigned; + use type C.int; + + WSAData_Dummy : array (1 .. 512) of C.int; + + WS_Version : constant := 16#0202#; + Initialized : Boolean := False; + + function Standard_Connect + (S : C.int; + Name : System.Address; + Namelen : C.int) return C.int; + pragma Import (Stdcall, Standard_Connect, "connect"); + + function Standard_Select + (Nfds : C.int; + Readfds : Fd_Set_Access; + Writefds : Fd_Set_Access; + Exceptfds : Fd_Set_Access; + Timeout : Timeval_Access) return C.int; + pragma Import (Stdcall, Standard_Select, "select"); + + type Error_Type is + (N_EINTR, + N_EBADF, + N_EACCES, + N_EFAULT, + N_EINVAL, + N_EMFILE, + N_EWOULDBLOCK, + N_EINPROGRESS, + N_EALREADY, + N_ENOTSOCK, + N_EDESTADDRREQ, + N_EMSGSIZE, + N_EPROTOTYPE, + N_ENOPROTOOPT, + N_EPROTONOSUPPORT, + N_ESOCKTNOSUPPORT, + N_EOPNOTSUPP, + N_EPFNOSUPPORT, + N_EAFNOSUPPORT, + N_EADDRINUSE, + N_EADDRNOTAVAIL, + N_ENETDOWN, + N_ENETUNREACH, + N_ENETRESET, + N_ECONNABORTED, + N_ECONNRESET, + N_ENOBUFS, + N_EISCONN, + N_ENOTCONN, + N_ESHUTDOWN, + N_ETOOMANYREFS, + N_ETIMEDOUT, + N_ECONNREFUSED, + N_ELOOP, + N_ENAMETOOLONG, + N_EHOSTDOWN, + N_EHOSTUNREACH, + N_WSASYSNOTREADY, + N_WSAVERNOTSUPPORTED, + N_WSANOTINITIALISED, + N_WSAEDISCON, + N_HOST_NOT_FOUND, + N_TRY_AGAIN, + N_NO_RECOVERY, + N_NO_DATA, + N_OTHERS); + + Error_Messages : constant array (Error_Type) of chars_ptr := + (N_EINTR => + New_String ("Interrupted system call"), + N_EBADF => + New_String ("Bad file number"), + N_EACCES => + New_String ("Permission denied"), + N_EFAULT => + New_String ("Bad address"), + N_EINVAL => + New_String ("Invalid argument"), + N_EMFILE => + New_String ("Too many open files"), + N_EWOULDBLOCK => + New_String ("Operation would block"), + N_EINPROGRESS => + New_String ("Operation now in progress. This error is " + & "returned if any Windows Sockets API " + & "function is called while a blocking " + & "function is in progress"), + N_EALREADY => + New_String ("Operation already in progress"), + N_ENOTSOCK => + New_String ("Socket operation on nonsocket"), + N_EDESTADDRREQ => + New_String ("Destination address required"), + N_EMSGSIZE => + New_String ("Message too long"), + N_EPROTOTYPE => + New_String ("Protocol wrong type for socket"), + N_ENOPROTOOPT => + New_String ("Protocol not available"), + N_EPROTONOSUPPORT => + New_String ("Protocol not supported"), + N_ESOCKTNOSUPPORT => + New_String ("Socket type not supported"), + N_EOPNOTSUPP => + New_String ("Operation not supported on socket"), + N_EPFNOSUPPORT => + New_String ("Protocol family not supported"), + N_EAFNOSUPPORT => + New_String ("Address family not supported by protocol family"), + N_EADDRINUSE => + New_String ("Address already in use"), + N_EADDRNOTAVAIL => + New_String ("Cannot assign requested address"), + N_ENETDOWN => + New_String ("Network is down. This error may be " + & "reported at any time if the Windows " + & "Sockets implementation detects an " + & "underlying failure"), + N_ENETUNREACH => + New_String ("Network is unreachable"), + N_ENETRESET => + New_String ("Network dropped connection on reset"), + N_ECONNABORTED => + New_String ("Software caused connection abort"), + N_ECONNRESET => + New_String ("Connection reset by peer"), + N_ENOBUFS => + New_String ("No buffer space available"), + N_EISCONN => + New_String ("Socket is already connected"), + N_ENOTCONN => + New_String ("Socket is not connected"), + N_ESHUTDOWN => + New_String ("Cannot send after socket shutdown"), + N_ETOOMANYREFS => + New_String ("Too many references: cannot splice"), + N_ETIMEDOUT => + New_String ("Connection timed out"), + N_ECONNREFUSED => + New_String ("Connection refused"), + N_ELOOP => + New_String ("Too many levels of symbolic links"), + N_ENAMETOOLONG => + New_String ("File name too long"), + N_EHOSTDOWN => + New_String ("Host is down"), + N_EHOSTUNREACH => + New_String ("No route to host"), + N_WSASYSNOTREADY => + New_String ("Returned by WSAStartup(), indicating that " + & "the network subsystem is unusable"), + N_WSAVERNOTSUPPORTED => + New_String ("Returned by WSAStartup(), indicating that " + & "the Windows Sockets DLL cannot support " + & "this application"), + N_WSANOTINITIALISED => + New_String ("Winsock not initialized. This message is " + & "returned by any function except WSAStartup(), " + & "indicating that a successful WSAStartup() has " + & "not yet been performed"), + N_WSAEDISCON => + New_String ("Disconnected"), + N_HOST_NOT_FOUND => + New_String ("Host not found. This message indicates " + & "that the key (name, address, and so on) was not found"), + N_TRY_AGAIN => + New_String ("Nonauthoritative host not found. This error may " + & "suggest that the name service itself is not " + & "functioning"), + N_NO_RECOVERY => + New_String ("Nonrecoverable error. This error may suggest that the " + & "name service itself is not functioning"), + N_NO_DATA => + New_String ("Valid name, no data record of requested type. " + & "This error indicates that the key (name, address, " + & "and so on) was not found."), + N_OTHERS => + New_String ("Unknown system error")); + + --------------- + -- C_Connect -- + --------------- + + function C_Connect + (S : C.int; + Name : System.Address; + Namelen : C.int) return C.int + is + Res : C.int; + + begin + Res := Standard_Connect (S, Name, Namelen); + + if Res = -1 then + if Socket_Errno = SOSC.EWOULDBLOCK then + Set_Socket_Errno (SOSC.EINPROGRESS); + end if; + end if; + + return Res; + end C_Connect; + + ------------- + -- C_Readv -- + ------------- + + function C_Readv + (Fd : C.int; + Iov : System.Address; + Iovcnt : C.int) return C.int + is + Res : C.int; + Count : C.int := 0; + + Iovec : array (0 .. Iovcnt - 1) of Vector_Element; + for Iovec'Address use Iov; + pragma Import (Ada, Iovec); + + begin + for J in Iovec'Range loop + Res := C_Recv + (Fd, + Iovec (J).Base.all'Address, + C.int (Iovec (J).Length), + 0); + + if Res < 0 then + return Res; + else + Count := Count + Res; + end if; + end loop; + return Count; + end C_Readv; + + -------------- + -- C_Select -- + -------------- + + function C_Select + (Nfds : C.int; + Readfds : Fd_Set_Access; + Writefds : Fd_Set_Access; + Exceptfds : Fd_Set_Access; + Timeout : Timeval_Access) return C.int + is + pragma Warnings (Off, Exceptfds); + + RFS : constant Fd_Set_Access := Readfds; + WFS : constant Fd_Set_Access := Writefds; + WFSC : Fd_Set_Access := No_Fd_Set_Access; + EFS : Fd_Set_Access := Exceptfds; + Res : C.int; + S : aliased C.int; + Last : aliased C.int; + + begin + -- Asynchronous connection failures are notified in the + -- exception fd set instead of the write fd set. To ensure + -- POSIX compatibility, copy write fd set into exception fd + -- set. Once select() returns, check any socket present in the + -- exception fd set and peek at incoming out-of-band data. If + -- the test is not successful, and the socket is present in + -- the initial write fd set, then move the socket from the + -- exception fd set to the write fd set. + + if WFS /= No_Fd_Set_Access then + -- Add any socket present in write fd set into exception fd set + + if EFS = No_Fd_Set_Access then + EFS := New_Socket_Set (WFS); + + else + WFSC := New_Socket_Set (WFS); + + Last := Nfds - 1; + loop + Get_Socket_From_Set + (WFSC, S'Unchecked_Access, Last'Unchecked_Access); + exit when S = -1; + Insert_Socket_In_Set (EFS, S); + end loop; + + Free_Socket_Set (WFSC); + end if; + + -- Keep a copy of write fd set + + WFSC := New_Socket_Set (WFS); + end if; + + Res := Standard_Select (Nfds, RFS, WFS, EFS, Timeout); + + if EFS /= No_Fd_Set_Access then + declare + EFSC : constant Fd_Set_Access := New_Socket_Set (EFS); + Flag : constant C.int := SOSC.MSG_PEEK + SOSC.MSG_OOB; + Buffer : Character; + Length : C.int; + Fromlen : aliased C.int; + + begin + Last := Nfds - 1; + loop + Get_Socket_From_Set + (EFSC, S'Unchecked_Access, Last'Unchecked_Access); + + -- No more sockets in EFSC + + exit when S = -1; + + -- Check out-of-band data + + Length := C_Recvfrom + (S, Buffer'Address, 1, Flag, + null, Fromlen'Unchecked_Access); + + -- If the signal is not an out-of-band data, then it + -- is a connection failure notification. + + if Length = -1 then + Remove_Socket_From_Set (EFS, S); + + -- If S is present in the initial write fd set, + -- move it from exception fd set back to write fd + -- set. Otherwise, ignore this event since the user + -- is not watching for it. + + if WFSC /= No_Fd_Set_Access + and then (Is_Socket_In_Set (WFSC, S) /= 0) + then + Insert_Socket_In_Set (WFS, S); + end if; + end if; + end loop; + + Free_Socket_Set (EFSC); + end; + + if Exceptfds = No_Fd_Set_Access then + Free_Socket_Set (EFS); + end if; + end if; + + -- Free any copy of write fd set + + if WFSC /= No_Fd_Set_Access then + Free_Socket_Set (WFSC); + end if; + + return Res; + end C_Select; + + -------------- + -- C_Writev -- + -------------- + + function C_Writev + (Fd : C.int; + Iov : System.Address; + Iovcnt : C.int) return C.int + is + Res : C.int; + Count : C.int := 0; + + Iovec : array (0 .. Iovcnt - 1) of Vector_Element; + for Iovec'Address use Iov; + pragma Import (Ada, Iovec); + + begin + for J in Iovec'Range loop + Res := C_Send + (Fd, + Iovec (J).Base.all'Address, + C.int (Iovec (J).Length), + 0); + + if Res < 0 then + return Res; + else + Count := Count + Res; + end if; + end loop; + return Count; + end C_Writev; + + -------------- + -- Finalize -- + -------------- + + procedure Finalize is + begin + if Initialized then + WSACleanup; + Initialized := False; + end if; + end Finalize; + + ------------------------- + -- Host_Error_Messages -- + ------------------------- + + package body Host_Error_Messages is + + -- On Windows, socket and host errors share the same code space, and + -- error messages are provided by Socket_Error_Message. The default + -- separate body for Host_Error_Messages is therefore not used in + -- this case. + + function Host_Error_Message + (H_Errno : Integer) return C.Strings.chars_ptr + renames Socket_Error_Message; + + end Host_Error_Messages; + + ---------------- + -- Initialize -- + ---------------- + + procedure Initialize is + Return_Value : Interfaces.C.int; + begin + if not Initialized then + Return_Value := WSAStartup (WS_Version, WSAData_Dummy'Address); + pragma Assert (Return_Value = 0); + Initialized := True; + end if; + end Initialize; + + -------------------- + -- Signalling_Fds -- + -------------------- + + package body Signalling_Fds is separate; + + -------------------------- + -- Socket_Error_Message -- + -------------------------- + + function Socket_Error_Message + (Errno : Integer) return C.Strings.chars_ptr + is + use GNAT.Sockets.SOSC; + + begin + case Errno is + when EINTR => return Error_Messages (N_EINTR); + when EBADF => return Error_Messages (N_EBADF); + when EACCES => return Error_Messages (N_EACCES); + when EFAULT => return Error_Messages (N_EFAULT); + when EINVAL => return Error_Messages (N_EINVAL); + when EMFILE => return Error_Messages (N_EMFILE); + when EWOULDBLOCK => return Error_Messages (N_EWOULDBLOCK); + when EINPROGRESS => return Error_Messages (N_EINPROGRESS); + when EALREADY => return Error_Messages (N_EALREADY); + when ENOTSOCK => return Error_Messages (N_ENOTSOCK); + when EDESTADDRREQ => return Error_Messages (N_EDESTADDRREQ); + when EMSGSIZE => return Error_Messages (N_EMSGSIZE); + when EPROTOTYPE => return Error_Messages (N_EPROTOTYPE); + when ENOPROTOOPT => return Error_Messages (N_ENOPROTOOPT); + when EPROTONOSUPPORT => return Error_Messages (N_EPROTONOSUPPORT); + when ESOCKTNOSUPPORT => return Error_Messages (N_ESOCKTNOSUPPORT); + when EOPNOTSUPP => return Error_Messages (N_EOPNOTSUPP); + when EPFNOSUPPORT => return Error_Messages (N_EPFNOSUPPORT); + when EAFNOSUPPORT => return Error_Messages (N_EAFNOSUPPORT); + when EADDRINUSE => return Error_Messages (N_EADDRINUSE); + when EADDRNOTAVAIL => return Error_Messages (N_EADDRNOTAVAIL); + when ENETDOWN => return Error_Messages (N_ENETDOWN); + when ENETUNREACH => return Error_Messages (N_ENETUNREACH); + when ENETRESET => return Error_Messages (N_ENETRESET); + when ECONNABORTED => return Error_Messages (N_ECONNABORTED); + when ECONNRESET => return Error_Messages (N_ECONNRESET); + when ENOBUFS => return Error_Messages (N_ENOBUFS); + when EISCONN => return Error_Messages (N_EISCONN); + when ENOTCONN => return Error_Messages (N_ENOTCONN); + when ESHUTDOWN => return Error_Messages (N_ESHUTDOWN); + when ETOOMANYREFS => return Error_Messages (N_ETOOMANYREFS); + when ETIMEDOUT => return Error_Messages (N_ETIMEDOUT); + when ECONNREFUSED => return Error_Messages (N_ECONNREFUSED); + when ELOOP => return Error_Messages (N_ELOOP); + when ENAMETOOLONG => return Error_Messages (N_ENAMETOOLONG); + when EHOSTDOWN => return Error_Messages (N_EHOSTDOWN); + when EHOSTUNREACH => return Error_Messages (N_EHOSTUNREACH); + + -- Windows-specific error codes + + when WSASYSNOTREADY => return Error_Messages (N_WSASYSNOTREADY); + when WSAVERNOTSUPPORTED => + return Error_Messages (N_WSAVERNOTSUPPORTED); + when WSANOTINITIALISED => + return Error_Messages (N_WSANOTINITIALISED); + when WSAEDISCON => return Error_Messages (N_WSAEDISCON); + + -- h_errno values + + when HOST_NOT_FOUND => return Error_Messages (N_HOST_NOT_FOUND); + when TRY_AGAIN => return Error_Messages (N_TRY_AGAIN); + when NO_RECOVERY => return Error_Messages (N_NO_RECOVERY); + when NO_DATA => return Error_Messages (N_NO_DATA); + + when others => return Error_Messages (N_OTHERS); + end case; + end Socket_Error_Message; + +end GNAT.Sockets.Thin; |