1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S --
10 -- $Revision: 1.1 $ --
12 -- Copyright (C) 2000 Free Software Foundation, Inc. --
14 -- GNARL is free software; you can redistribute it and/or modify it under --
15 -- terms of the GNU General Public License as published by the Free Soft- --
16 -- ware Foundation; either version 2, or (at your option) any later ver- --
17 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
18 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
19 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
20 -- for more details. You should have received a copy of the GNU General --
21 -- Public License distributed with GNARL; see file COPYING. If not, write --
22 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
23 -- MA 02111-1307, USA. --
25 -- As a special exception, if other files instantiate generics from this --
26 -- unit, or you link this unit with other files to produce an executable, --
27 -- this unit does not by itself cause the resulting executable to be --
28 -- covered by the GNU General Public License. This exception does not --
29 -- however invalidate any other reasons why the executable file might be --
30 -- covered by the GNU Public License. --
32 -- GNARL was developed by the GNARL team at Florida State University. It is --
33 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
34 -- State University (http://www.gnat.com). --
36 ------------------------------------------------------------------------------
37 -- This package is for OpenVMS/Alpha
39 with System.OS_Interface;
41 with Unchecked_Conversion;
42 package body System.Task_Primitives.Operations.DEC is
44 use System.OS_Interface;
47 use type Interfaces.C.int;
49 -- The FAB_RAB_Type specifieds where the context field (the calling
50 -- task) is stored. Other fields defined for FAB_RAB aren't need and
54 CTX : Unsigned_Longword;
59 CTX at 24 range 0 .. 31;
62 for FAB_RAB_Type'Size use 224;
64 type FAB_RAB_Access_Type is access all FAB_RAB_Type;
66 -----------------------
67 -- Local Subprograms --
68 -----------------------
70 function To_Unsigned_Longword is new
71 Unchecked_Conversion (Task_ID, Unsigned_Longword);
73 function To_Task_Id is new
74 Unchecked_Conversion (Unsigned_Longword, Task_ID);
76 function To_FAB_RAB is new
77 Unchecked_Conversion (Address, FAB_RAB_Access_Type);
79 ---------------------------
80 -- Interrupt_AST_Handler --
81 ---------------------------
83 procedure Interrupt_AST_Handler (ID : Address) is
84 Result : Interfaces.C.int;
85 AST_Self_ID : Task_ID := To_Task_Id (ID);
87 Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
88 pragma Assert (Result = 0);
89 end Interrupt_AST_Handler;
95 procedure RMS_AST_Handler (ID : Address) is
96 AST_Self_ID : Task_ID := To_Task_Id (To_FAB_RAB (ID).CTX);
97 Result : Interfaces.C.int;
99 AST_Self_ID.Common.LL.AST_Pending := False;
100 Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
101 pragma Assert (Result = 0);
108 function Self return Unsigned_Longword is
109 Self_ID : Task_ID := Self;
111 Self_ID.Common.LL.AST_Pending := True;
112 return To_Unsigned_Longword (Self);
115 -------------------------
116 -- Starlet_AST_Handler --
117 -------------------------
119 procedure Starlet_AST_Handler (ID : Address) is
120 Result : Interfaces.C.int;
121 AST_Self_ID : Task_ID := To_Task_Id (ID);
123 AST_Self_ID.Common.LL.AST_Pending := False;
124 Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
125 pragma Assert (Result = 0);
126 end Starlet_AST_Handler;
132 procedure Task_Synch is
133 Synch_Self_ID : Task_ID := Self;
135 Write_Lock (Synch_Self_ID);
136 Synch_Self_ID.Common.State := AST_Server_Sleep;
137 while Synch_Self_ID.Common.LL.AST_Pending loop
138 Sleep (Synch_Self_ID, AST_Server_Sleep);
140 Synch_Self_ID.Common.State := Runnable;
141 Unlock (Synch_Self_ID);
144 end System.Task_Primitives.Operations.DEC;