------------------------------------------------------------------------------
-- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . O S _ I N T E R F A C E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1991-1994, Florida State University --
--- Copyright (C) 1995-2004, Free Software Foundation, Inc. --
+-- Copyright (C) 1995-2009, Free Software Foundation, Inc. --
-- --
-- GNARL 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- --
-- 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 GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- 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 is a AIX (Native THREADS) version of this package
--- This package encapsulates all direct interfaces to OS services
--- that are needed by children of System.
+-- This package encapsulates all direct interfaces to OS services that are
+-- needed by the tasking run-time (libgnarl).
-- PLEASE DO NOT add any with-clauses to this package or remove the pragma
-- Preelaborate. This package is designed to be a bottom-level (leaf) package.
+with Ada.Unchecked_Conversion;
+
with Interfaces.C;
-with Unchecked_Conversion;
package System.OS_Interface is
pragma Preelaborate;
- pragma Linker_Options ("-lpthreads");
+ pragma Linker_Options ("-pthread");
+ -- This implies -lpthreads + other things depending on the GCC
+ -- configuration, such as the selection of a proper libgcc variant
+ -- for table-based exception handling when it is available.
+
pragma Linker_Options ("-lc_r");
subtype int is Interfaces.C.int;
SIGXFSZ : constant := 25; -- filesize limit exceeded
SIGWAITING : constant := 39; -- m:n scheduling
- -- the following signals are AIX specific
+ -- The following signals are AIX specific
+
SIGMSG : constant := 27; -- input data is in the ring buffer
SIGDANGER : constant := 33; -- system crash imminent
SIGMIGRATE : constant := 35; -- migrate process
SIGPRE : constant := 36; -- programming exception
SIGVIRT : constant := 37; -- AIX virtual time alarm
SIGALRM1 : constant := 38; -- m:n condition variables
+ SIGCPUFAIL : constant := 59; -- Predictive De-configuration of Processors
SIGKAP : constant := 60; -- keep alive poll from native keyboard
SIGGRANT : constant := SIGKAP; -- monitor mode granted
- SIGRETRACT : constant := 61; -- monitor mode should be relinguished
+ SIGRETRACT : constant := 61; -- monitor mode should be relinquished
SIGSOUND : constant := 62; -- sound control has completed
SIGSAK : constant := 63; -- secure attention key
- SIGADAABORT : constant := SIGTERM;
- -- Note: on other targets, we usually use SIGABRT, but on AiX, it
- -- appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
+ SIGADAABORT : constant := SIGEMT;
+ -- Note: on other targets, we usually use SIGABRT, but on AIX, it appears
+ -- that SIGABRT can't be used in sigwait(), so we use SIGEMT.
+ -- SIGEMT is "Emulator Trap Instruction" from the PDP-11, and does not
+ -- have a standardized usage.
type Signal_Set is array (Natural range <>) of Signal;
- Unmasked : constant Signal_Set :=
- (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
- Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP);
+ Unmasked : constant Signal_Set :=
+ (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
+ Reserved : constant Signal_Set :=
+ (SIGABRT, SIGKILL, SIGSTOP, SIGALRM1, SIGWAITING, SIGCPUFAIL);
type sigset_t is private;
pragma Convention (C, struct_sigaction);
type struct_sigaction_ptr is access all struct_sigaction;
- SA_SIGINFO : constant := 16#0100#;
+ SA_SIGINFO : constant := 16#0100#;
+ SA_ONSTACK : constant := 16#0001#;
SIG_BLOCK : constant := 0;
SIG_UNBLOCK : constant := 1;
-- Time --
----------
- Time_Slice_Supported : constant Boolean := False;
- -- Indicates wether time slicing is supported
+ Time_Slice_Supported : constant Boolean := True;
+ -- Indicates whether time slicing is supported
type timespec is private;
function clock_gettime
(clock_id : clockid_t;
tp : access timespec) return int;
- -- AiX threads don't have clock_gettime
- -- We instead use gettimeofday()
function To_Duration (TS : timespec) return Duration;
pragma Inline (To_Duration);
pragma Convention (C, struct_timezone);
type struct_timezone_ptr is access all struct_timezone;
- type struct_timeval is private;
- -- This is needed on systems that do not have clock_gettime()
- -- but do have gettimeofday().
-
- function To_Duration (TV : struct_timeval) return Duration;
- pragma Inline (To_Duration);
-
- function To_Timeval (D : Duration) return struct_timeval;
- pragma Inline (To_Timeval);
-
-------------------------
-- Priority Scheduling --
-------------------------
SCHED_RR : constant := 2;
SCHED_OTHER : constant := 0;
+ function To_Target_Priority
+ (Prio : System.Any_Priority) return Interfaces.C.int;
+ -- Maps System.Any_Priority to a POSIX priority
+
-------------
-- Process --
-------------
type Thread_Body is access
function (arg : System.Address) return System.Address;
+ pragma Convention (C, Thread_Body);
function Thread_Body_Access is new
- Unchecked_Conversion (System.Address, Thread_Body);
+ Ada.Unchecked_Conversion (System.Address, Thread_Body);
type pthread_t is private;
subtype Thread_Id is pthread_t;
PTHREAD_CREATE_DETACHED : constant := 1;
+ PTHREAD_SCOPE_PROCESS : constant := 1;
+ PTHREAD_SCOPE_SYSTEM : constant := 0;
+
-----------
-- Stack --
-----------
+ type stack_t is record
+ ss_sp : System.Address;
+ ss_size : size_t;
+ ss_flags : int;
+ end record;
+ pragma Convention (C, stack_t);
+
+ function sigaltstack
+ (ss : not null access stack_t;
+ oss : access stack_t) return int;
+ pragma Import (C, sigaltstack, "sigaltstack");
+
+ Alternate_Stack : aliased System.Address;
+ -- This is a dummy definition, never used (Alternate_Stack_Size is null)
+
+ Alternate_Stack_Size : constant := 0;
+ -- No alternate signal stack is used on this platform
+
Stack_Base_Available : constant Boolean := False;
- -- Indicates wether the stack base is available on this target.
+ -- Indicates whether the stack base is available on this target
function Get_Stack_Base (thread : pthread_t) return Address;
pragma Inline (Get_Stack_Base);
- -- returns the stack base of the specified thread.
- -- Only call this function when Stack_Base_Available is True.
+ -- Returns the stack base of the specified thread. Only call this function
+ -- when Stack_Base_Available is True.
function Get_Page_Size return size_t;
function Get_Page_Size return Address;
pragma Import (C, Get_Page_Size, "getpagesize");
- -- returns the size of a page, or 0 if this is not relevant on this
- -- target
+ -- Returns the size of a page
PROT_NONE : constant := 0;
PROT_READ : constant := 1;
PROT_WRITE : constant := 2;
PROT_EXEC : constant := 4;
PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
-
PROT_ON : constant := PROT_READ;
PROT_OFF : constant := PROT_ALL;
---------------------------------------
-- Though not documented, pthread_init *must* be called before any other
- -- pthread call
+ -- pthread call.
procedure pthread_init;
pragma Import (C, pthread_init, "pthread_init");
sig : Signal) return int;
pragma Import (C, pthread_kill, "pthread_kill");
- type sigset_t_ptr is access all sigset_t;
-
function pthread_sigmask
(how : int;
- set : sigset_t_ptr;
- oset : sigset_t_ptr) return int;
+ set : access sigset_t;
+ oset : access sigset_t) return int;
pragma Import (C, pthread_sigmask, "sigthreadmask");
--------------------------
-- POSIX.1c Section 13 --
--------------------------
- PTHREAD_PRIO_NONE : constant := 0;
- PTHREAD_PRIO_PROTECT : constant := 0;
- PTHREAD_PRIO_INHERIT : constant := 0;
+ PTHREAD_PRIO_PROTECT : constant := 2;
+
+ function PTHREAD_PRIO_INHERIT return int;
+ -- Return value of C macro PTHREAD_PRIO_INHERIT. This function is needed
+ -- since the value is different between AIX versions.
function pthread_mutexattr_setprotocol
(attr : access pthread_mutexattr_t;
pragma Import (C, pthread_attr_setschedparam);
function sched_yield return int;
- -- AiX have a nonstandard sched_yield.
+ -- AIX have a nonstandard sched_yield
--------------------------
-- P1003.1c Section 16 --
function pthread_getspecific (key : pthread_key_t) return System.Address;
pragma Import (C, pthread_getspecific, "pthread_getspecific");
- type destructor_pointer is access
- procedure (arg : System.Address);
+ type destructor_pointer is access procedure (arg : System.Address);
+ pragma Convention (C, destructor_pointer);
function pthread_key_create
(key : access pthread_key_t;
pragma Import (C, pthread_key_create, "pthread_key_create");
private
-
type sigset_t is record
losigs : unsigned_long;
hisigs : unsigned_long;
type clockid_t is new int;
CLOCK_REALTIME : constant clockid_t := 0;
- type struct_timeval is record
- tv_sec : long;
- tv_usec : long;
- end record;
- pragma Convention (C, struct_timeval);
-
type pthread_attr_t is new System.Address;
pragma Convention (C, pthread_attr_t);
-- typedef struct __pt_attr *pthread_attr_t;
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