| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- E X P _ S M E M -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1998-2014, Free Software Foundation, Inc. -- |
| -- -- |
| -- 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING3. If not, go to -- |
| -- http://www.gnu.org/licenses for a complete copy of the license. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package contains routines involved in the required expansions for |
| -- handling shared memory accesses for variables in Shared_Passive packages. |
| |
| -- See detailed documentation in System.Shared_Storage spec for a full |
| -- description of the approach that is taken for handling distributed |
| -- shared memory. This expansion unit in the compiler is responsible |
| -- for generating the calls to routines in System.Shared_Storage. |
| |
| with Types; use Types; |
| package Exp_Smem is |
| |
| procedure Expand_Shared_Passive_Variable (N : Node_Id); |
| -- N is the identifier for a shared passive variable. This routine is |
| -- responsible for determining if this is an assigned to N, or a |
| -- reference to N, and generating the required calls to the shared |
| -- memory read/write procedures. |
| |
| procedure Add_Shared_Var_Lock_Procs (N : Node_Id); |
| -- The argument is a protected subprogram call, before it is rewritten |
| -- by Exp_Ch9.Build_Protected_Subprogram_Call. This routine, which is |
| -- called only in the case of an external call to a protected object |
| -- that has Is_Shared_Passive set, deals with installing a transient scope |
| -- and acquiring the appropriate global lock calls for this case. It also |
| -- generates the necessary read/write calls for the protected object within |
| -- the lock region. |
| |
| function Make_Shared_Var_Procs (N : Node_Id) return Node_Id; |
| -- N is the node for the declaration of a shared passive variable. |
| -- This procedure constructs an instantiation of |
| -- System.Shared_Storage.Shared_Var_Procs that contains the read and |
| -- assignment procedures for the shared memory variable. |
| -- See System.Shared_Storage for a full description of these procedures |
| -- and how they are used. The last inserted node is returned. |
| |
| end Exp_Smem; |
