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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . M M A P . U N I X --
-- --
-- S p e c --
-- --
-- Copyright (C) 2007-2018, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY 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. --
-- --
------------------------------------------------------------------------------
-- Declaration of off_t/mmap/munmap. This particular implementation
-- supposes off_t is long.
with System.OS_Lib;
with Interfaces.C;
package System.Mmap.Unix is
type Mmap_Prot is new Interfaces.C.int;
-- PROT_NONE : constant Mmap_Prot := 16#00#;
-- PROT_EXEC : constant Mmap_Prot := 16#04#;
PROT_READ : constant Mmap_Prot := 16#01#;
PROT_WRITE : constant Mmap_Prot := 16#02#;
type Mmap_Flags is new Interfaces.C.int;
-- MAP_NONE : constant Mmap_Flags := 16#00#;
-- MAP_FIXED : constant Mmap_Flags := 16#10#;
MAP_SHARED : constant Mmap_Flags := 16#01#;
MAP_PRIVATE : constant Mmap_Flags := 16#02#;
type off_t is new Long_Integer;
function Mmap (Start : Address := Null_Address;
Length : Interfaces.C.size_t;
Prot : Mmap_Prot := PROT_READ;
Flags : Mmap_Flags := MAP_PRIVATE;
Fd : System.OS_Lib.File_Descriptor;
Offset : off_t) return Address;
pragma Import (C, Mmap, "mmap");
function Munmap (Start : Address;
Length : Interfaces.C.size_t) return Integer;
pragma Import (C, Munmap, "munmap");
function Is_Mapping_Available return Boolean is (True);
-- Wheter memory mapping is actually available on this system. It is an
-- error to use Create_Mapping and Dispose_Mapping if this is False.
end System.Mmap.Unix;
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