--- /dev/null
+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . P A R A M E T E R S --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1992-2005 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 2, 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 COPYING. If not, write --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
+-- --
+-- As a special exception, if other files instantiate generics from this --
+-- unit, or you link this unit with other files to produce an executable, --
+-- this unit does not by itself cause the resulting executable to be --
+-- covered by the GNU General Public License. This exception does not --
+-- however invalidate any other reasons why the executable file might be --
+-- covered by the GNU Public License. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the OpenVMS Alpha version
+
+-- This package defines some system dependent parameters for GNAT. These
+-- are values that are referenced by the runtime library and are therefore
+-- relevant to the target machine.
+
+-- The parameters whose value is defined in the spec are not generally
+-- expected to be changed. If they are changed, it will be necessary to
+-- recompile the run-time library.
+
+-- The parameters which are defined by functions can be changed by modifying
+-- the body of System.Parameters in file s-parame.adb. A change to this body
+-- requires only rebinding and relinking of the application.
+
+-- Note: do not introduce any pragma Inline statements into this unit, since
+-- otherwise the relinking and rebinding capability would be deactivated.
+
+package System.Parameters is
+ pragma Pure;
+
+ ---------------------------------------
+ -- Task And Stack Allocation Control --
+ ---------------------------------------
+
+ type Task_Storage_Size is new Integer;
+ -- Type used in tasking units for task storage size
+
+ type Size_Type is new Task_Storage_Size;
+ -- Type used to provide task storage size to runtime
+
+ Unspecified_Size : constant Size_Type := Size_Type'First;
+ -- Value used to indicate that no size type is set
+
+ subtype Ratio is Size_Type range -1 .. 100;
+ Dynamic : constant Size_Type := -1;
+ -- The secondary stack ratio is a constant between 0 and 100 which
+ -- determines the percentage of the allocated task stack that is
+ -- used by the secondary stack (the rest being the primary stack).
+ -- The special value of minus one indicates that the secondary
+ -- stack is to be allocated from the heap instead.
+
+ Sec_Stack_Ratio : constant Ratio := Dynamic;
+ -- This constant defines the handling of the secondary stack
+
+ Sec_Stack_Dynamic : constant Boolean := Sec_Stack_Ratio = Dynamic;
+ -- Convenient Boolean for testing for dynamic secondary stack
+
+ function Default_Stack_Size return Size_Type;
+ -- Default task stack size used if none is specified
+
+ function Minimum_Stack_Size return Size_Type;
+ -- Minimum task stack size permitted
+
+ function Adjust_Storage_Size (Size : Size_Type) return Size_Type;
+ -- Given the storage size stored in the TCB, return the Storage_Size
+ -- value required by the RM for the Storage_Size attribute. The
+ -- required adjustment is as follows:
+ --
+ -- when Size = Unspecified_Size, return Default_Stack_Size
+ -- when Size < Minimum_Stack_Size, return Minimum_Stack_Size
+ -- otherwise return given Size
+
+ Default_Env_Stack_Size : constant Size_Type := 8_192_000;
+ -- Assumed size of the environment task, if no other information
+ -- is available. This value is used when stack checking is
+ -- enabled and no GNAT_STACK_LIMIT environment variable is set.
+
+ Stack_Grows_Down : constant Boolean := True;
+ -- This constant indicates whether the stack grows up (False) or
+ -- down (True) in memory as functions are called. It is used for
+ -- proper implementation of the stack overflow check.
+
+ ----------------------------------------------
+ -- Characteristics of types in Interfaces.C --
+ ----------------------------------------------
+
+ long_bits : constant := 32;
+ -- Number of bits in type long and unsigned_long. The normal convention
+ -- is that this is the same as type Long_Integer, but this is not true
+ -- of all targets. For example, in OpenVMS long /= Long_Integer.
+
+ ----------------------------------------------
+ -- Behavior of Pragma Finalize_Storage_Only --
+ ----------------------------------------------
+
+ -- Garbage_Collected is a Boolean constant whose value indicates the
+ -- effect of the pragma Finalize_Storage_Entry on a controlled type.
+
+ -- Garbage_Collected = False
+
+ -- The system releases all storage on program termination only,
+ -- but not other garbage collection occurs, so finalization calls
+ -- are ommitted only for outer level onjects can be omitted if
+ -- pragma Finalize_Storage_Only is used.
+
+ -- Garbage_Collected = True
+
+ -- The system provides full garbage collection, so it is never
+ -- necessary to release storage for controlled objects for which
+ -- a pragma Finalize_Storage_Only is used.
+
+ Garbage_Collected : constant Boolean := False;
+ -- The storage mode for this system (release on program exit)
+
+ ---------------------
+ -- Tasking Profile --
+ ---------------------
+
+ -- In the following sections, constant parameters are defined to
+ -- allow some optimizations and fine tuning within the tasking run time
+ -- based on restrictions on the tasking features.
+
+ ----------------------
+ -- Locking Strategy --
+ ----------------------
+
+ Single_Lock : constant Boolean := True;
+ -- Indicates whether a single lock should be used within the tasking
+ -- run-time to protect internal structures. If True, a single lock
+ -- will be used, meaning less locking/unlocking operations, but also
+ -- more global contention. In general, Single_Lock should be set to
+ -- True on single processor machines, and to False to multi-processor
+ -- systems, but this can vary from application to application and also
+ -- depends on the scheduling policy.
+
+ -------------------
+ -- Task Abortion --
+ -------------------
+
+ No_Abort : constant Boolean := False;
+ -- This constant indicates whether abort statements and asynchronous
+ -- transfer of control (ATC) are disallowed. If set to True, it is
+ -- assumed that neither construct is used, and the run time does not
+ -- need to defer/undefer abort and check for pending actions at
+ -- completion points. A value of True for No_Abort corresponds to:
+ -- pragma Restrictions (No_Abort_Statements);
+ -- pragma Restrictions (Max_Asynchronous_Select_Nesting => 0);
+
+ ----------------------
+ -- Dynamic Priority --
+ ----------------------
+
+ Dynamic_Priority_Support : constant Boolean := True;
+ -- This constant indicates whether dynamic changes of task priorities
+ -- are allowed (True means normal RM mode in which such changes are
+ -- allowed). In particular, if this is False, then we do not need to
+ -- poll for pending base priority changes at every abort completion
+ -- point. A value of False for Dynamic_Priority_Support corresponds
+ -- to pragma Restrictions (No_Dynamic_Priorities);
+
+ ---------------------
+ -- Task Attributes --
+ ---------------------
+
+ Default_Attribute_Count : constant := 4;
+ -- Number of pre-allocated Address-sized task attributes stored in the
+ -- task control block.
+
+ --------------------
+ -- Runtime Traces --
+ --------------------
+
+ Runtime_Traces : constant Boolean := False;
+ -- This constant indicates whether the runtime outputs traces to a
+ -- predefined output or not (True means that traces are output).
+ -- See System.Traces for more details.
+
+ ------------------------------
+ -- Exception Message Length --
+ ------------------------------
+
+ Default_Exception_Msg_Max_Length : constant := 512;
+ -- This constant specifies the maximum number of characters to allow in an
+ -- exception message (see RM 11.4.1(18)). The value for VMS exceeds the
+ -- default minimum of 200 to allow for the length of chained VMS condition
+ -- handling messages.
+
+end System.Parameters;
--- /dev/null
+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . P A R A M E T E R S --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1992-2005 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 2, 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 COPYING. If not, write --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
+-- --
+-- As a special exception, if other files instantiate generics from this --
+-- unit, or you link this unit with other files to produce an executable, --
+-- this unit does not by itself cause the resulting executable to be --
+-- covered by the GNU General Public License. This exception does not --
+-- however invalidate any other reasons why the executable file might be --
+-- covered by the GNU Public License. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the Integrity OpenVMS version
+
+-- This package defines some system dependent parameters for GNAT. These
+-- are values that are referenced by the runtime library and are therefore
+-- relevant to the target machine.
+
+-- The parameters whose value is defined in the spec are not generally
+-- expected to be changed. If they are changed, it will be necessary to
+-- recompile the run-time library.
+
+-- The parameters which are defined by functions can be changed by modifying
+-- the body of System.Parameters in file s-parame.adb. A change to this body
+-- requires only rebinding and relinking of the application.
+
+-- Note: do not introduce any pragma Inline statements into this unit, since
+-- otherwise the relinking and rebinding capability would be deactivated.
+
+package System.Parameters is
+ pragma Pure;
+
+ ---------------------------------------
+ -- Task And Stack Allocation Control --
+ ---------------------------------------
+
+ type Task_Storage_Size is new Integer;
+ -- Type used in tasking units for task storage size
+
+ type Size_Type is new Task_Storage_Size;
+ -- Type used to provide task storage size to runtime
+
+ Unspecified_Size : constant Size_Type := Size_Type'First;
+ -- Value used to indicate that no size type is set
+
+ subtype Ratio is Size_Type range -1 .. 100;
+ Dynamic : constant Size_Type := -1;
+ -- The secondary stack ratio is a constant between 0 and 100 which
+ -- determines the percentage of the allocated task stack that is
+ -- used by the secondary stack (the rest being the primary stack).
+ -- The special value of minus one indicates that the secondary
+ -- stack is to be allocated from the heap instead.
+
+ Sec_Stack_Ratio : constant Ratio := Dynamic;
+ -- This constant defines the handling of the secondary stack
+
+ Sec_Stack_Dynamic : constant Boolean := Sec_Stack_Ratio = Dynamic;
+ -- Convenient Boolean for testing for dynamic secondary stack
+
+ function Default_Stack_Size return Size_Type;
+ -- Default task stack size used if none is specified
+
+ function Minimum_Stack_Size return Size_Type;
+ -- Minimum task stack size permitted
+
+ function Adjust_Storage_Size (Size : Size_Type) return Size_Type;
+ -- Given the storage size stored in the TCB, return the Storage_Size
+ -- value required by the RM for the Storage_Size attribute. The
+ -- required adjustment is as follows:
+ --
+ -- when Size = Unspecified_Size, return Default_Stack_Size
+ -- when Size < Minimum_Stack_Size, return Minimum_Stack_Size
+ -- otherwise return given Size
+
+ Default_Env_Stack_Size : constant Size_Type := 8_192_000;
+ -- Assumed size of the environment task, if no other information
+ -- is available. This value is used when stack checking is
+ -- enabled and no GNAT_STACK_LIMIT environment variable is set.
+
+ Stack_Grows_Down : constant Boolean := True;
+ -- This constant indicates whether the stack grows up (False) or
+ -- down (True) in memory as functions are called. It is used for
+ -- proper implementation of the stack overflow check.
+
+ ----------------------------------------------
+ -- Characteristics of types in Interfaces.C --
+ ----------------------------------------------
+
+ long_bits : constant := 32;
+ -- Number of bits in type long and unsigned_long. The normal convention
+ -- is that this is the same as type Long_Integer, but this is not true
+ -- of all targets. For example, in OpenVMS long /= Long_Integer.
+
+ ----------------------------------------------
+ -- Behavior of Pragma Finalize_Storage_Only --
+ ----------------------------------------------
+
+ -- Garbage_Collected is a Boolean constant whose value indicates the
+ -- effect of the pragma Finalize_Storage_Entry on a controlled type.
+
+ -- Garbage_Collected = False
+
+ -- The system releases all storage on program termination only,
+ -- but not other garbage collection occurs, so finalization calls
+ -- are ommitted only for outer level onjects can be omitted if
+ -- pragma Finalize_Storage_Only is used.
+
+ -- Garbage_Collected = True
+
+ -- The system provides full garbage collection, so it is never
+ -- necessary to release storage for controlled objects for which
+ -- a pragma Finalize_Storage_Only is used.
+
+ Garbage_Collected : constant Boolean := False;
+ -- The storage mode for this system (release on program exit)
+
+ ---------------------
+ -- Tasking Profile --
+ ---------------------
+
+ -- In the following sections, constant parameters are defined to
+ -- allow some optimizations and fine tuning within the tasking run time
+ -- based on restrictions on the tasking features.
+
+ ----------------------
+ -- Locking Strategy --
+ ----------------------
+
+ Single_Lock : constant Boolean := False;
+ -- Indicates whether a single lock should be used within the tasking
+ -- run-time to protect internal structures. If True, a single lock
+ -- will be used, meaning less locking/unlocking operations, but also
+ -- more global contention. In general, Single_Lock should be set to
+ -- True on single processor machines, and to False to multi-processor
+ -- systems, but this can vary from application to application and also
+ -- depends on the scheduling policy.
+
+ -------------------
+ -- Task Abortion --
+ -------------------
+
+ No_Abort : constant Boolean := False;
+ -- This constant indicates whether abort statements and asynchronous
+ -- transfer of control (ATC) are disallowed. If set to True, it is
+ -- assumed that neither construct is used, and the run time does not
+ -- need to defer/undefer abort and check for pending actions at
+ -- completion points. A value of True for No_Abort corresponds to:
+ -- pragma Restrictions (No_Abort_Statements);
+ -- pragma Restrictions (Max_Asynchronous_Select_Nesting => 0);
+
+ ----------------------
+ -- Dynamic Priority --
+ ----------------------
+
+ Dynamic_Priority_Support : constant Boolean := True;
+ -- This constant indicates whether dynamic changes of task priorities
+ -- are allowed (True means normal RM mode in which such changes are
+ -- allowed). In particular, if this is False, then we do not need to
+ -- poll for pending base priority changes at every abort completion
+ -- point. A value of False for Dynamic_Priority_Support corresponds
+ -- to pragma Restrictions (No_Dynamic_Priorities);
+
+ ---------------------
+ -- Task Attributes --
+ ---------------------
+
+ Default_Attribute_Count : constant := 4;
+ -- Number of pre-allocated Address-sized task attributes stored in the
+ -- task control block.
+
+ --------------------
+ -- Runtime Traces --
+ --------------------
+
+ Runtime_Traces : constant Boolean := False;
+ -- This constant indicates whether the runtime outputs traces to a
+ -- predefined output or not (True means that traces are output).
+ -- See System.Traces for more details.
+
+ ------------------------------
+ -- Exception Message Length --
+ ------------------------------
+
+ Default_Exception_Msg_Max_Length : constant := 512;
+ -- This constant specifies the maximum number of characters to allow in an
+ -- exception message (see RM 11.4.1(18)). The value for VMS exceeds the
+ -- default minimum of 200 to allow for the length of chained VMS condition
+ -- handling messages.
+
+end System.Parameters;
+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S Y S T E M . P A R A M E T E R S --
--- --
--- S p e c --
--- --
--- Copyright (C) 1992-2005 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 2, 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 COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This is the OpenVMS version
-
--- This package defines some system dependent parameters for GNAT. These
--- are values that are referenced by the runtime library and are therefore
--- relevant to the target machine.
-
--- The parameters whose value is defined in the spec are not generally
--- expected to be changed. If they are changed, it will be necessary to
--- recompile the run-time library.
-
--- The parameters which are defined by functions can be changed by modifying
--- the body of System.Parameters in file s-parame.adb. A change to this body
--- requires only rebinding and relinking of the application.
-
--- Note: do not introduce any pragma Inline statements into this unit, since
--- otherwise the relinking and rebinding capability would be deactivated.
-
-package System.Parameters is
- pragma Pure;
-
- ---------------------------------------
- -- Task And Stack Allocation Control --
- ---------------------------------------
-
- type Task_Storage_Size is new Integer;
- -- Type used in tasking units for task storage size
-
- type Size_Type is new Task_Storage_Size;
- -- Type used to provide task storage size to runtime
-
- Unspecified_Size : constant Size_Type := Size_Type'First;
- -- Value used to indicate that no size type is set
-
- subtype Ratio is Size_Type range -1 .. 100;
- Dynamic : constant Size_Type := -1;
- -- The secondary stack ratio is a constant between 0 and 100 which
- -- determines the percentage of the allocated task stack that is
- -- used by the secondary stack (the rest being the primary stack).
- -- The special value of minus one indicates that the secondary
- -- stack is to be allocated from the heap instead.
-
- Sec_Stack_Ratio : constant Ratio := Dynamic;
- -- This constant defines the handling of the secondary stack
-
- Sec_Stack_Dynamic : constant Boolean := Sec_Stack_Ratio = Dynamic;
- -- Convenient Boolean for testing for dynamic secondary stack
-
- function Default_Stack_Size return Size_Type;
- -- Default task stack size used if none is specified
-
- function Minimum_Stack_Size return Size_Type;
- -- Minimum task stack size permitted
-
- function Adjust_Storage_Size (Size : Size_Type) return Size_Type;
- -- Given the storage size stored in the TCB, return the Storage_Size
- -- value required by the RM for the Storage_Size attribute. The
- -- required adjustment is as follows:
- --
- -- when Size = Unspecified_Size, return Default_Stack_Size
- -- when Size < Minimum_Stack_Size, return Minimum_Stack_Size
- -- otherwise return given Size
-
- Default_Env_Stack_Size : constant Size_Type := 8_192_000;
- -- Assumed size of the environment task, if no other information
- -- is available. This value is used when stack checking is
- -- enabled and no GNAT_STACK_LIMIT environment variable is set.
-
- Stack_Grows_Down : constant Boolean := True;
- -- This constant indicates whether the stack grows up (False) or
- -- down (True) in memory as functions are called. It is used for
- -- proper implementation of the stack overflow check.
-
- ----------------------------------------------
- -- Characteristics of types in Interfaces.C --
- ----------------------------------------------
-
- long_bits : constant := 32;
- -- Number of bits in type long and unsigned_long. The normal convention
- -- is that this is the same as type Long_Integer, but this is not true
- -- of all targets. For example, in OpenVMS long /= Long_Integer.
-
- ----------------------------------------------
- -- Behavior of Pragma Finalize_Storage_Only --
- ----------------------------------------------
-
- -- Garbage_Collected is a Boolean constant whose value indicates the
- -- effect of the pragma Finalize_Storage_Entry on a controlled type.
-
- -- Garbage_Collected = False
-
- -- The system releases all storage on program termination only,
- -- but not other garbage collection occurs, so finalization calls
- -- are ommitted only for outer level onjects can be omitted if
- -- pragma Finalize_Storage_Only is used.
-
- -- Garbage_Collected = True
-
- -- The system provides full garbage collection, so it is never
- -- necessary to release storage for controlled objects for which
- -- a pragma Finalize_Storage_Only is used.
-
- Garbage_Collected : constant Boolean := False;
- -- The storage mode for this system (release on program exit)
-
- ---------------------
- -- Tasking Profile --
- ---------------------
-
- -- In the following sections, constant parameters are defined to
- -- allow some optimizations and fine tuning within the tasking run time
- -- based on restrictions on the tasking features.
-
- ----------------------
- -- Locking Strategy --
- ----------------------
-
- Single_Lock : constant Boolean := True;
- -- Indicates whether a single lock should be used within the tasking
- -- run-time to protect internal structures. If True, a single lock
- -- will be used, meaning less locking/unlocking operations, but also
- -- more global contention. In general, Single_Lock should be set to
- -- True on single processor machines, and to False to multi-processor
- -- systems, but this can vary from application to application and also
- -- depends on the scheduling policy.
-
- -------------------
- -- Task Abortion --
- -------------------
-
- No_Abort : constant Boolean := False;
- -- This constant indicates whether abort statements and asynchronous
- -- transfer of control (ATC) are disallowed. If set to True, it is
- -- assumed that neither construct is used, and the run time does not
- -- need to defer/undefer abort and check for pending actions at
- -- completion points. A value of True for No_Abort corresponds to:
- -- pragma Restrictions (No_Abort_Statements);
- -- pragma Restrictions (Max_Asynchronous_Select_Nesting => 0);
-
- ----------------------
- -- Dynamic Priority --
- ----------------------
-
- Dynamic_Priority_Support : constant Boolean := True;
- -- This constant indicates whether dynamic changes of task priorities
- -- are allowed (True means normal RM mode in which such changes are
- -- allowed). In particular, if this is False, then we do not need to
- -- poll for pending base priority changes at every abort completion
- -- point. A value of False for Dynamic_Priority_Support corresponds
- -- to pragma Restrictions (No_Dynamic_Priorities);
-
- ---------------------
- -- Task Attributes --
- ---------------------
-
- Default_Attribute_Count : constant := 4;
- -- Number of pre-allocated Address-sized task attributes stored in the
- -- task control block.
-
- --------------------
- -- Runtime Traces --
- --------------------
-
- Runtime_Traces : constant Boolean := False;
- -- This constant indicates whether the runtime outputs traces to a
- -- predefined output or not (True means that traces are output).
- -- See System.Traces for more details.
-
- ------------------------------
- -- Exception Message Length --
- ------------------------------
-
- Default_Exception_Msg_Max_Length : constant := 512;
- -- This constant specifies the maximum number of characters to allow in an
- -- exception message (see RM 11.4.1(18)). The value for VMS exceeds the
- -- default minimum of 200 to allow for the length of chained VMS condition
- -- handling messages.
-
-end System.Parameters;
projects / gcc.git / commitdiff