| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . M M A P . U N I X -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2007-2021, 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; |
