70 lines
3.7 KiB
Ada
70 lines
3.7 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT RUN-TIME COMPONENTS --
|
|
-- --
|
|
-- S Y S T E M . M M A P . U N I X --
|
|
-- --
|
|
-- S p e c --
|
|
-- --
|
|
-- Copyright (C) 2007-2020, 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;
|