1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- SYSTEM.INTERRUPT_MANAGEMENT.OPERATIONS --
9 -- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a OpenVMS/Alpha version of this package
36 with System.OS_Interface;
38 with System.Parameters;
40 with System.Tasking.Initialization;
41 with System.Task_Primitives;
42 with System.Task_Primitives.Operations;
43 with System.Task_Primitives.Operations.DEC;
45 with Ada.Unchecked_Conversion;
47 package body System.Interrupt_Management.Operations is
49 use System.OS_Interface;
50 use System.Parameters;
52 use type unsigned_short;
54 function To_Address is
55 new Ada.Unchecked_Conversion
56 (Task_Id, System.Task_Primitives.Task_Address);
58 package POP renames System.Task_Primitives.Operations;
60 ----------------------------
61 -- Thread_Block_Interrupt --
62 ----------------------------
64 procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID) is
65 pragma Warnings (Off, Interrupt);
68 end Thread_Block_Interrupt;
70 ------------------------------
71 -- Thread_Unblock_Interrupt --
72 ------------------------------
74 procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID) is
75 pragma Warnings (Off, Interrupt);
78 end Thread_Unblock_Interrupt;
80 ------------------------
81 -- Set_Interrupt_Mask --
82 ------------------------
84 procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask) is
85 pragma Warnings (Off, Mask);
88 end Set_Interrupt_Mask;
90 procedure Set_Interrupt_Mask
91 (Mask : access Interrupt_Mask;
92 OMask : access Interrupt_Mask)
94 pragma Warnings (Off, Mask);
95 pragma Warnings (Off, OMask);
98 end Set_Interrupt_Mask;
100 ------------------------
101 -- Get_Interrupt_Mask --
102 ------------------------
104 procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask) is
105 pragma Warnings (Off, Mask);
108 end Get_Interrupt_Mask;
114 function To_unsigned_long is new
115 Ada.Unchecked_Conversion (System.Aux_DEC.Short_Address, unsigned_long);
117 function Interrupt_Wait (Mask : access Interrupt_Mask)
120 Self_ID : constant Task_Id := Self;
121 Iosb : IO_Status_Block_Type := (0, 0, 0);
122 Status : Cond_Value_Type;
126 -- A QIO read is registered. The system call returns immediately
127 -- after scheduling an AST to be fired when the operation
132 Chan => Rcv_Interrupt_Chan,
136 POP.DEC.Interrupt_AST_Handler'Access,
137 Astprm => To_Address (Self_ID),
138 P1 => To_unsigned_long (Interrupt_Mailbox'Address),
139 P2 => Interrupt_ID'Size / 8);
141 pragma Assert ((Status and 1) = 1);
145 -- Wait to be woken up. Could be that the AST has fired,
146 -- in which case the Iosb.Status variable will be non-zero,
147 -- or maybe the wait is being aborted.
151 System.Tasking.Interrupt_Server_Blocked_On_Event_Flag);
153 if Iosb.Status /= 0 then
154 if (Iosb.Status and 1) = 1
155 and then Mask (Signal (Interrupt_Mailbox))
157 return Interrupt_Mailbox;
162 POP.Unlock (Self_ID);
168 System.Tasking.Initialization.Undefer_Abort (Self_ID);
169 System.Tasking.Initialization.Defer_Abort (Self_ID);
175 POP.Write_Lock (Self_ID);
180 ----------------------------
181 -- Install_Default_Action --
182 ----------------------------
184 procedure Install_Default_Action (Interrupt : Interrupt_ID) is
185 pragma Warnings (Off, Interrupt);
188 end Install_Default_Action;
190 ---------------------------
191 -- Install_Ignore_Action --
192 ---------------------------
194 procedure Install_Ignore_Action (Interrupt : Interrupt_ID) is
195 pragma Warnings (Off, Interrupt);
198 end Install_Ignore_Action;
200 -------------------------
201 -- Fill_Interrupt_Mask --
202 -------------------------
204 procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask) is
206 Mask.all := (others => True);
207 end Fill_Interrupt_Mask;
209 --------------------------
210 -- Empty_Interrupt_Mask --
211 --------------------------
213 procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask) is
215 Mask.all := (others => False);
216 end Empty_Interrupt_Mask;
218 ---------------------------
219 -- Add_To_Interrupt_Mask --
220 ---------------------------
222 procedure Add_To_Interrupt_Mask
223 (Mask : access Interrupt_Mask;
224 Interrupt : Interrupt_ID)
227 Mask (Signal (Interrupt)) := True;
228 end Add_To_Interrupt_Mask;
230 --------------------------------
231 -- Delete_From_Interrupt_Mask --
232 --------------------------------
234 procedure Delete_From_Interrupt_Mask
235 (Mask : access Interrupt_Mask;
236 Interrupt : Interrupt_ID)
239 Mask (Signal (Interrupt)) := False;
240 end Delete_From_Interrupt_Mask;
247 (Mask : access Interrupt_Mask;
248 Interrupt : Interrupt_ID) return Boolean
251 return Mask (Signal (Interrupt));
254 -------------------------
255 -- Copy_Interrupt_Mask --
256 -------------------------
258 procedure Copy_Interrupt_Mask
259 (X : out Interrupt_Mask;
264 end Copy_Interrupt_Mask;
266 ----------------------------
267 -- Interrupt_Self_Process --
268 ----------------------------
270 procedure Interrupt_Self_Process (Interrupt : Interrupt_ID) is
271 Status : Cond_Value_Type;
275 Chan => Snd_Interrupt_Chan,
276 Func => IO_WRITEVBLK,
277 P1 => To_unsigned_long (Interrupt'Address),
278 P2 => Interrupt_ID'Size / 8);
280 -- The following could use a comment ???
282 pragma Assert ((Status and 1) = 1);
283 end Interrupt_Self_Process;
285 --------------------------
286 -- Setup_Interrupt_Mask --
287 --------------------------
289 procedure Setup_Interrupt_Mask is
292 end Setup_Interrupt_Mask;
295 Interrupt_Management.Initialize;
296 Environment_Mask := (others => False);
297 All_Tasks_Mask := (others => True);
299 for J in Interrupt_ID loop
300 if Keep_Unmasked (J) then
301 Environment_Mask (Signal (J)) := True;
302 All_Tasks_Mask (Signal (J)) := False;
305 end System.Interrupt_Management.Operations;