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dacffa1db0
Style cleanup missing from recent commits. no-precommit-check (to avoid complains about copyright headers) TN: V209-051 Change-Id: Id614483a4a69f1b430860cb6101fdad249bcb3ef
127 lines
6.0 KiB
Ada
127 lines
6.0 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- FLORIST (FSU Implementation of POSIX.5) COMPONENTS --
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-- --
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-- P O S I X . S H A R E D _ M E M O R Y _ O B J E C T S --
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-- --
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-- B o d y --
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-- --
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-- --
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-- Copyright (C) 1996-1997 Florida State University --
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-- Copyright (C) 1998-2010, AdaCore --
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-- --
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-- This file is a component of FLORIST, an implementation of an Ada API --
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-- for the POSIX OS services, for use with the GNAT Ada compiler and --
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-- the FSU Gnu Ada Runtime Library (GNARL). The interface is intended --
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-- to be close to that specified in IEEE STD 1003.5: 1990 and IEEE STD --
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-- 1003.5b: 1996. --
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-- --
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-- FLORIST is free software; you can redistribute it and/or modify it --
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-- under terms of the GNU General Public License as published by the --
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-- Free Software Foundation; either version 2, or (at your option) any --
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-- later version. FLORIST is distributed in the hope that it will be --
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-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
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-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
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-- General Public License for more details. You should have received a --
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-- copy of the GNU General Public License distributed with GNARL; see --
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-- file COPYING. If not, write to the Free Software Foundation, 59 --
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-- Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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------------------------------------------------------------------------------
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with Ada.Unchecked_Conversion,
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POSIX.C,
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POSIX.Implementation,
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POSIX.Permissions.Implementation;
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package body POSIX.Shared_Memory_Objects is
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use POSIX.C;
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use POSIX.Implementation;
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use POSIX.Permissions.Implementation;
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function To_int is new Ada.Unchecked_Conversion (Bits, int);
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C_File_Mode : constant array (POSIX.IO.File_Mode) of Bits :=
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(POSIX.IO.Read_Only => O_RDONLY,
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POSIX.IO.Write_Only => O_WRONLY,
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POSIX.IO.Read_Write => O_RDWR);
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--------------------------
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-- Open_Shared_Memory --
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--------------------------
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function shm_open
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(name : char_ptr;
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oflag : int;
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mode : mode_t) return int;
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pragma Import (C, shm_open, shm_open_LINKNAME);
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function Open_Shared_Memory
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(Name : POSIX.POSIX_String;
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Mode : POSIX.IO.File_Mode;
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Options : POSIX.IO.Open_Option_Set := POSIX.IO.Empty_Set;
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Masked_Signals : POSIX.Signal_Masking := POSIX.RTS_Signals)
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return POSIX.IO.File_Descriptor is
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Old_Mask : aliased Signal_Mask;
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Name_With_NUL : POSIX_String := Name & NUL;
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Result : POSIX.IO.File_Descriptor;
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begin
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Mask_Signals (Masked_Signals, Old_Mask'Unchecked_Access);
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Result := POSIX.IO.File_Descriptor (Check (shm_open
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(Name_With_NUL (Name_With_NUL'First)'Unchecked_Access,
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To_int (Option_Set (Options).Option or C_File_Mode (Mode)),
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0), Old_Mask'Unchecked_Access));
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Check_NNeg_And_Restore_Signals
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(int (Result), Masked_Signals, Old_Mask'Unchecked_Access);
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return Result;
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end Open_Shared_Memory;
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------------------------------------
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-- Open_Or_Create_Shared_Memory --
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------------------------------------
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function Open_Or_Create_Shared_Memory
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(Name : POSIX.POSIX_String;
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Mode : POSIX.IO.File_Mode;
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Permissions : POSIX.Permissions.Permission_Set;
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Options : POSIX.IO.Open_Option_Set := POSIX.IO.Empty_Set;
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Masked_Signals : POSIX.Signal_Masking := POSIX.RTS_Signals)
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return POSIX.IO.File_Descriptor is
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Old_Mask : aliased Signal_Mask;
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Name_With_NUL : POSIX_String := Name & NUL;
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Result : POSIX.IO.File_Descriptor;
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begin
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Mask_Signals (Masked_Signals, Old_Mask'Unchecked_Access);
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Result := POSIX.IO.File_Descriptor (Check (shm_open
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(Name_With_NUL (Name_With_NUL'First)'Unchecked_Access,
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To_int (Option_Set (Options).Option or C_File_Mode (Mode) or O_CREAT),
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Form_C_Permission (Permissions)), Old_Mask'Unchecked_Access));
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Check_NNeg_And_Restore_Signals
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(int (Result), Masked_Signals, Old_Mask'Unchecked_Access);
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return Result;
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end Open_Or_Create_Shared_Memory;
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----------------------------
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-- Unlink_Shared_Memory --
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----------------------------
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procedure Unlink_Shared_Memory
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(Name : POSIX.POSIX_String) is
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Name_With_NUL : POSIX_String := Name & NUL;
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function shm_unlink (name : char_ptr) return int;
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pragma Import (C, shm_unlink, shm_unlink_LINKNAME);
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begin
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Check (shm_unlink
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(Name_With_NUL (Name_With_NUL'First)'Unchecked_Access));
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end Unlink_Shared_Memory;
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end POSIX.Shared_Memory_Objects;
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