diff options
Diffstat (limited to 'gcc-4.8.3/gcc/ada/g-sothco.ads')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/g-sothco.ads | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/g-sothco.ads b/gcc-4.8.3/gcc/ada/g-sothco.ads new file mode 100644 index 000000000..b957f225e --- /dev/null +++ b/gcc-4.8.3/gcc/ada/g-sothco.ads @@ -0,0 +1,417 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T . S O C K E T S . T H I N _ C O M M O N -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2008-2012, 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 is the target-independent part of the thin sockets mapping. +-- This package should not be directly with'ed by an applications program. + +with Ada.Unchecked_Conversion; + +with Interfaces.C; +with Interfaces.C.Pointers; + +package GNAT.Sockets.Thin_Common is + + package C renames Interfaces.C; + + use type C.int; + -- This is so we can declare the Failure constant below + + Success : constant C.int := 0; + Failure : constant C.int := -1; + + type time_t is + range -2 ** (8 * SOSC.SIZEOF_tv_sec - 1) + .. 2 ** (8 * SOSC.SIZEOF_tv_sec - 1) - 1; + for time_t'Size use 8 * SOSC.SIZEOF_tv_sec; + pragma Convention (C, time_t); + + type suseconds_t is + range -2 ** (8 * SOSC.SIZEOF_tv_usec - 1) + .. 2 ** (8 * SOSC.SIZEOF_tv_usec - 1) - 1; + for suseconds_t'Size use 8 * SOSC.SIZEOF_tv_usec; + pragma Convention (C, suseconds_t); + + type Timeval is record + Tv_Sec : time_t; + Tv_Usec : suseconds_t; + end record; + pragma Convention (C, Timeval); + + type Timeval_Access is access all Timeval; + pragma Convention (C, Timeval_Access); + + Immediat : constant Timeval := (0, 0); + + ------------------------------------------- + -- Mapping tables to low level constants -- + ------------------------------------------- + + Families : constant array (Family_Type) of C.int := + (Family_Inet => SOSC.AF_INET, + Family_Inet6 => SOSC.AF_INET6); + + Lengths : constant array (Family_Type) of C.unsigned_char := + (Family_Inet => SOSC.SIZEOF_sockaddr_in, + Family_Inet6 => SOSC.SIZEOF_sockaddr_in6); + + ---------------------------- + -- Generic socket address -- + ---------------------------- + + -- Common header + + -- All socket address types (struct sockaddr, struct sockaddr_storage, + -- and protocol specific address types) start with the same 2-byte header, + -- which is either a length and a family (one byte each) or just a two-byte + -- family. The following unchecked union describes the two possible layouts + -- and is meant to be constrained with SOSC.Have_Sockaddr_Len. + + type Sockaddr_Length_And_Family + (Has_Sockaddr_Len : Boolean := False) + is record + case Has_Sockaddr_Len is + when True => + Length : C.unsigned_char; + Char_Family : C.unsigned_char; + + when False => + Short_Family : C.unsigned_short; + end case; + end record; + pragma Unchecked_Union (Sockaddr_Length_And_Family); + pragma Convention (C, Sockaddr_Length_And_Family); + + procedure Set_Family + (Length_And_Family : out Sockaddr_Length_And_Family; + Family : Family_Type); + -- Set the family component to the appropriate value for Family, and also + -- set Length accordingly if applicable on this platform. + + type Sockaddr is record + Sa_Family : Sockaddr_Length_And_Family; + -- Address family (and address length on some platforms) + + Sa_Data : C.char_array (1 .. 14) := (others => C.nul); + -- Family-specific data + -- Note that some platforms require that all unused (reserved) bytes + -- in addresses be initialized to 0 (e.g. VxWorks). + end record; + pragma Convention (C, Sockaddr); + -- Generic socket address + + type Sockaddr_Access is access all Sockaddr; + pragma Convention (C, Sockaddr_Access); + -- Access to socket address + + ---------------------------- + -- AF_INET socket address -- + ---------------------------- + + type In_Addr is record + S_B1, S_B2, S_B3, S_B4 : C.unsigned_char; + end record; + for In_Addr'Alignment use C.int'Alignment; + pragma Convention (C, In_Addr); + -- IPv4 address, represented as a network-order C.int. Note that the + -- underlying operating system may assume that values of this type have + -- C.int alignment, so we need to provide a suitable alignment clause here. + + function To_In_Addr is new Ada.Unchecked_Conversion (C.int, In_Addr); + function To_Int is new Ada.Unchecked_Conversion (In_Addr, C.int); + + type In_Addr_Access is access all In_Addr; + pragma Convention (C, In_Addr_Access); + -- Access to internet address + + Inaddr_Any : aliased constant In_Addr := (others => 0); + -- Any internet address (all the interfaces) + + type In_Addr_Access_Array is array (C.size_t range <>) + of aliased In_Addr_Access; + pragma Convention (C, In_Addr_Access_Array); + + package In_Addr_Access_Pointers is new C.Pointers + (C.size_t, In_Addr_Access, In_Addr_Access_Array, null); + -- Array of internet addresses + + type Sockaddr_In is record + Sin_Family : Sockaddr_Length_And_Family; + -- Address family (and address length on some platforms) + + Sin_Port : C.unsigned_short; + -- Port in network byte order + + Sin_Addr : In_Addr; + -- IPv4 address + + Sin_Zero : C.char_array (1 .. 8) := (others => C.nul); + -- Padding + -- + -- Note that some platforms require that all unused (reserved) bytes + -- in addresses be initialized to 0 (e.g. VxWorks). + end record; + pragma Convention (C, Sockaddr_In); + -- Internet socket address + + type Sockaddr_In_Access is access all Sockaddr_In; + pragma Convention (C, Sockaddr_In_Access); + -- Access to internet socket address + + procedure Set_Port + (Sin : Sockaddr_In_Access; + Port : C.unsigned_short); + pragma Inline (Set_Port); + -- Set Sin.Sin_Port to Port + + procedure Set_Address + (Sin : Sockaddr_In_Access; + Address : In_Addr); + pragma Inline (Set_Address); + -- Set Sin.Sin_Addr to Address + + ------------------ + -- Host entries -- + ------------------ + + type Hostent is new + System.Storage_Elements.Storage_Array (1 .. SOSC.SIZEOF_struct_hostent); + for Hostent'Alignment use 8; + -- Host entry. This is an opaque type used only via the following + -- accessor functions, because 'struct hostent' has different layouts on + -- different platforms. + + type Hostent_Access is access all Hostent; + pragma Convention (C, Hostent_Access); + -- Access to host entry + + -- Note: the hostent and servent accessors that return char* + -- values are compiled with GCC, and on VMS they always return + -- 64-bit pointers, so we can't use C.Strings.chars_ptr, which + -- on VMS is 32 bits. + + function Hostent_H_Name + (E : Hostent_Access) return System.Address; + + function Hostent_H_Alias + (E : Hostent_Access; I : C.int) return System.Address; + + function Hostent_H_Addrtype + (E : Hostent_Access) return C.int; + + function Hostent_H_Length + (E : Hostent_Access) return C.int; + + function Hostent_H_Addr + (E : Hostent_Access; Index : C.int) return System.Address; + + --------------------- + -- Service entries -- + --------------------- + + type Servent is new + System.Storage_Elements.Storage_Array (1 .. SOSC.SIZEOF_struct_servent); + for Servent'Alignment use 8; + -- Service entry. This is an opaque type used only via the following + -- accessor functions, because 'struct servent' has different layouts on + -- different platforms. + + type Servent_Access is access all Servent; + pragma Convention (C, Servent_Access); + -- Access to service entry + + function Servent_S_Name + (E : Servent_Access) return System.Address; + + function Servent_S_Alias + (E : Servent_Access; Index : C.int) return System.Address; + + function Servent_S_Port + (E : Servent_Access) return C.unsigned_short; + + function Servent_S_Proto + (E : Servent_Access) return System.Address; + + ------------------ + -- NetDB access -- + ------------------ + + -- There are three possible situations for the following NetDB access + -- functions: + -- - inherently thread safe (case of data returned in a thread specific + -- buffer); + -- - thread safe using user-provided buffer; + -- - thread unsafe. + -- + -- In the first and third cases, the Buf and Buflen are ignored. In the + -- second case, the caller must provide a buffer large enough to + -- accommodate the returned data. In the third case, the caller must ensure + -- that these functions are called within a critical section. + + function C_Gethostbyname + (Name : C.char_array; + Ret : not null access Hostent; + Buf : System.Address; + Buflen : C.int; + H_Errnop : not null access C.int) return C.int; + + function C_Gethostbyaddr + (Addr : System.Address; + Addr_Len : C.int; + Addr_Type : C.int; + Ret : not null access Hostent; + Buf : System.Address; + Buflen : C.int; + H_Errnop : not null access C.int) return C.int; + + function C_Getservbyname + (Name : C.char_array; + Proto : C.char_array; + Ret : not null access Servent; + Buf : System.Address; + Buflen : C.int) return C.int; + + function C_Getservbyport + (Port : C.int; + Proto : C.char_array; + Ret : not null access Servent; + Buf : System.Address; + Buflen : C.int) return C.int; + + ------------------------------------ + -- Scatter/gather vector handling -- + ------------------------------------ + + type Msghdr is record + Msg_Name : System.Address; + Msg_Namelen : C.unsigned; + Msg_Iov : System.Address; + Msg_Iovlen : SOSC.Msg_Iovlen_T; + Msg_Control : System.Address; + Msg_Controllen : C.size_t; + Msg_Flags : C.int; + end record; + pragma Convention (C, Msghdr); + + ---------------------------- + -- Socket sets management -- + ---------------------------- + + procedure Get_Socket_From_Set + (Set : access Fd_Set; + Last : access C.int; + Socket : access C.int); + -- Get last socket in Socket and remove it from the socket set. The + -- parameter Last is a maximum value of the largest socket. This hint is + -- used to avoid scanning very large socket sets. After a call to + -- Get_Socket_From_Set, Last is set back to the real largest socket in the + -- socket set. + + procedure Insert_Socket_In_Set + (Set : access Fd_Set; + Socket : C.int); + -- Insert socket in the socket set + + function Is_Socket_In_Set + (Set : access constant Fd_Set; + Socket : C.int) return C.int; + -- Check whether Socket is in the socket set, return a non-zero + -- value if it is, zero if it is not. + + procedure Last_Socket_In_Set + (Set : access Fd_Set; + Last : access C.int); + -- Find the largest socket in the socket set. This is needed for select(). + -- When Last_Socket_In_Set is called, parameter Last is a maximum value of + -- the largest socket. This hint is used to avoid scanning very large + -- socket sets. After the call, Last is set back to the real largest socket + -- in the socket set. + + procedure Remove_Socket_From_Set (Set : access Fd_Set; Socket : C.int); + -- Remove socket from the socket set + + procedure Reset_Socket_Set (Set : access Fd_Set); + -- Make Set empty + + ------------------------------------------ + -- Pairs of signalling file descriptors -- + ------------------------------------------ + + type Two_Ints is array (0 .. 1) of C.int; + pragma Convention (C, Two_Ints); + -- Container for two int values + + subtype Fd_Pair is Two_Ints; + -- Two_Ints as used for Create_Signalling_Fds: a pair of connected file + -- descriptors, one of which (the "read end" of the connection) being used + -- for reading, the other one (the "write end") being used for writing. + + Read_End : constant := 0; + Write_End : constant := 1; + -- Indexes into an Fd_Pair value providing access to each of the connected + -- file descriptors. + + function Inet_Pton + (Af : C.int; + Cp : System.Address; + Inp : System.Address) return C.int; + + function C_Ioctl + (Fd : C.int; + Req : SOSC.IOCTL_Req_T; + Arg : access C.int) return C.int; + +private + pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set"); + pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set"); + pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set"); + pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set"); + pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set"); + pragma Import (C, Reset_Socket_Set, "__gnat_reset_socket_set"); + pragma Import (C, C_Ioctl, "__gnat_socket_ioctl"); + pragma Import (C, Inet_Pton, SOSC.Inet_Pton_Linkname); + + pragma Import (C, C_Gethostbyname, "__gnat_gethostbyname"); + pragma Import (C, C_Gethostbyaddr, "__gnat_gethostbyaddr"); + pragma Import (C, C_Getservbyname, "__gnat_getservbyname"); + pragma Import (C, C_Getservbyport, "__gnat_getservbyport"); + + pragma Import (C, Servent_S_Name, "__gnat_servent_s_name"); + pragma Import (C, Servent_S_Alias, "__gnat_servent_s_alias"); + pragma Import (C, Servent_S_Port, "__gnat_servent_s_port"); + pragma Import (C, Servent_S_Proto, "__gnat_servent_s_proto"); + + pragma Import (C, Hostent_H_Name, "__gnat_hostent_h_name"); + pragma Import (C, Hostent_H_Alias, "__gnat_hostent_h_alias"); + pragma Import (C, Hostent_H_Addrtype, "__gnat_hostent_h_addrtype"); + pragma Import (C, Hostent_H_Length, "__gnat_hostent_h_length"); + pragma Import (C, Hostent_H_Addr, "__gnat_hostent_h_addr"); + +end GNAT.Sockets.Thin_Common; |