1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                  SYSTEM.INTERRUPT_MANAGEMENT.OPERATIONS                  --
6--                                                                          --
7--                                  S p e c                                 --
8--                                                                          --
9--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
10--                                                                          --
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 3,  or (at your option) any later ver- --
14-- sion.  GNAT 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.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNARL was developed by the GNARL team at Florida State University.       --
28-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29--                                                                          --
30------------------------------------------------------------------------------
31
32package System.Interrupt_Management.Operations is
33
34   procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID);
35   pragma Inline (Thread_Block_Interrupt);
36   --  Mask the calling thread for the interrupt
37
38   procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID);
39   pragma Inline (Thread_Unblock_Interrupt);
40   --  Unmask the calling thread for the interrupt
41
42   procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask);
43   --  Set the interrupt mask of the calling thread
44
45   procedure Set_Interrupt_Mask
46     (Mask  : access Interrupt_Mask;
47      OMask : access Interrupt_Mask);
48   pragma Inline (Set_Interrupt_Mask);
49   --  Set the interrupt mask of the calling thread while returning the
50   --  previous Mask.
51
52   procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask);
53   pragma Inline (Get_Interrupt_Mask);
54   --  Get the interrupt mask of the calling thread
55
56   function Interrupt_Wait (Mask : access Interrupt_Mask) return Interrupt_ID;
57   pragma Inline (Interrupt_Wait);
58   --  Wait for the interrupts specified in Mask and return
59   --  the interrupt received. Return 0 upon error.
60
61   procedure Install_Default_Action (Interrupt : Interrupt_ID);
62   pragma Inline (Install_Default_Action);
63   --  Set the sigaction of the Interrupt to default (SIG_DFL)
64
65   procedure Install_Ignore_Action (Interrupt : Interrupt_ID);
66   pragma Inline (Install_Ignore_Action);
67   --  Set the sigaction of the Interrupt to ignore (SIG_IGN)
68
69   procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask);
70   pragma Inline (Fill_Interrupt_Mask);
71   --  Get a Interrupt_Mask with all the interrupt masked
72
73   procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask);
74   pragma Inline (Empty_Interrupt_Mask);
75   --  Get a Interrupt_Mask with all the interrupt unmasked
76
77   procedure Add_To_Interrupt_Mask
78     (Mask      : access Interrupt_Mask;
79      Interrupt : Interrupt_ID);
80   pragma Inline (Add_To_Interrupt_Mask);
81   --  Mask the given interrupt in the Interrupt_Mask
82
83   procedure Delete_From_Interrupt_Mask
84     (Mask      : access Interrupt_Mask;
85      Interrupt : Interrupt_ID);
86   pragma Inline (Delete_From_Interrupt_Mask);
87   --  Unmask the given interrupt in the Interrupt_Mask
88
89   function Is_Member
90     (Mask      : access Interrupt_Mask;
91      Interrupt : Interrupt_ID) return Boolean;
92   pragma Inline (Is_Member);
93   --  See if a given interrupt is masked in the Interrupt_Mask
94
95   procedure Copy_Interrupt_Mask (X : out Interrupt_Mask; Y : Interrupt_Mask);
96   pragma Inline (Copy_Interrupt_Mask);
97   --  Assignment needed for limited private type Interrupt_Mask
98
99   procedure Interrupt_Self_Process (Interrupt : Interrupt_ID);
100   pragma Inline (Interrupt_Self_Process);
101   --  Raise an Interrupt process-level
102
103   procedure Setup_Interrupt_Mask;
104   --  Mask Environment task for all signals
105   --  This function should be called by the elaboration of System.Interrupt
106   --  to set up proper signal masking in all tasks.
107
108   --  The following objects serve as constants, but are initialized in the
109   --  body to aid portability. These should be in System.Interrupt_Management
110   --  but since Interrupt_Mask is private type we cannot have them declared
111   --  there.
112
113   --  Why not make these deferred constants that are initialized using
114   --  function calls in the private part???
115
116   Environment_Mask : aliased Interrupt_Mask;
117   --  This mask represents the mask of Environment task when this package is
118   --  being elaborated, except the signals being forced to be unmasked by RTS
119   --  (items in Keep_Unmasked)
120
121   All_Tasks_Mask : aliased Interrupt_Mask;
122   --  This is the mask of all tasks created in RTS. Only one task in RTS
123   --  is responsible for masking/unmasking signals (see s-interr.adb).
124
125end System.Interrupt_Management.Operations;
126