------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- --
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-- --
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-- GNAT LIBRARY COMPONENTS --
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-- GNAT LIBRARY COMPONENTS --
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-- --
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-- --
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-- G N A T . S E M A P H O R E S --
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-- G N A T . S E M A P H O R E S --
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-- --
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-- --
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-- B o d y --
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-- B o d y --
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-- --
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-- --
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-- Copyright (C) 2003-2005, AdaCore --
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-- Copyright (C) 2003-2005, AdaCore --
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-- --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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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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-- 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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-- 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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-- 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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-- 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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-- covered by the GNU Public License. --
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-- --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- --
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-- --
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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package body GNAT.Semaphores is
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package body GNAT.Semaphores is
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------------------------
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------------------------
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-- Counting_Semaphore --
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-- Counting_Semaphore --
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------------------------
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------------------------
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protected body Counting_Semaphore is
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protected body Counting_Semaphore is
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-----------
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-----------
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-- Seize --
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-- Seize --
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-----------
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-----------
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entry Seize when Count > 0 is
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entry Seize when Count > 0 is
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begin
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begin
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Count := Count - 1;
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Count := Count - 1;
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end Seize;
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end Seize;
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-------------
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-------------
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-- Release --
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-- Release --
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-------------
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-------------
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procedure Release is
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procedure Release is
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begin
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begin
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Count := Count + 1;
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Count := Count + 1;
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end Release;
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end Release;
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end Counting_Semaphore;
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end Counting_Semaphore;
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----------------------
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----------------------
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-- Binary_Semaphore --
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-- Binary_Semaphore --
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----------------------
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----------------------
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protected body Binary_Semaphore is
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protected body Binary_Semaphore is
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-----------
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-----------
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-- Seize --
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-- Seize --
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-----------
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-----------
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entry Seize when Available is
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entry Seize when Available is
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begin
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begin
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Available := False;
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Available := False;
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end Seize;
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end Seize;
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-------------
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-------------
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-- Release --
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-- Release --
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-------------
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-------------
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procedure Release is
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procedure Release is
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begin
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begin
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Available := True;
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Available := True;
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end Release;
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end Release;
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end Binary_Semaphore;
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end Binary_Semaphore;
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end GNAT.Semaphores;
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end GNAT.Semaphores;
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