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------------------------------------------------------------------------------

--                                                                          --

--                 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) 1995-2008, 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- --

-- ware  Foundation;  either version 2,  or (at your option) any later ver- --

-- sion. GNARL 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 GNARL; 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.                                      --

--                                                                          --

-- GNARL was developed by the GNARL team at Florida State University.       --

-- Extensive contributions were provided by Ada Core Technologies, Inc.     --

--                                                                          --

------------------------------------------------------------------------------

--  This is the HP-UX version of this package

--  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;

package System.OS_Interface is

   pragma Preelaborate;

   pragma Linker_Options ("-lcma");

   subtype int            is Interfaces.C.int;

   subtype short          is Interfaces.C.short;

   subtype long           is Interfaces.C.long;

   subtype unsigned       is Interfaces.C.unsigned;

   subtype unsigned_short is Interfaces.C.unsigned_short;

   subtype unsigned_long  is Interfaces.C.unsigned_long;

   subtype unsigned_char  is Interfaces.C.unsigned_char;

   subtype plain_char     is Interfaces.C.plain_char;

   subtype size_t         is Interfaces.C.size_t;

   -----------

   -- Errno --

   -----------

   function errno return int;

   pragma Import (C, errno, "__get_errno");

   EAGAIN    : constant := 11;

   EINTR     : constant := 4;

   EINVAL    : constant := 22;

   ENOMEM    : constant := 12;

   ETIME     : constant := 52;

   ETIMEDOUT : constant := 238;

   FUNC_ERR : constant := -1;

   -------------

   -- Signals --

   -------------

   Max_Interrupt : constant := 44;

   type Signal is new int range 0 .. Max_Interrupt;

   for Signal'Size use int'Size;

   SIGHUP     : constant := 1; --  hangup

   SIGINT     : constant := 2; --  interrupt (rubout)

   SIGQUIT    : constant := 3; --  quit (ASCD FS)

   SIGILL     : constant := 4; --  illegal instruction (not reset)

   SIGTRAP    : constant := 5; --  trace trap (not reset)

   SIGIOT     : constant := 6; --  IOT instruction

   SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future

   SIGEMT     : constant := 7; --  EMT instruction

   SIGFPE     : constant := 8; --  floating point exception

   SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)

   SIGBUS     : constant := 10; --  bus error

   SIGSEGV    : constant := 11; --  segmentation violation

   SIGSYS     : constant := 12; --  bad argument to system call

   SIGPIPE    : constant := 13; --  write on a pipe with no one to read it

   SIGALRM    : constant := 14; --  alarm clock

   SIGTERM    : constant := 15; --  software termination signal from kill

   SIGUSR1    : constant := 16; --  user defined signal 1

   SIGUSR2    : constant := 17; --  user defined signal 2

   SIGCLD     : constant := 18; --  alias for SIGCHLD

   SIGCHLD    : constant := 18; --  child status change

   SIGPWR     : constant := 19; --  power-fail restart

   SIGVTALRM  : constant := 20; --  virtual timer alarm

   SIGPROF    : constant := 21; --  profiling timer alarm

   SIGIO      : constant := 22; --  asynchronous I/O

   SIGPOLL    : constant := 22; --  pollable event occurred

   SIGWINCH   : constant := 23; --  window size change

   SIGSTOP    : constant := 24; --  stop (cannot be caught or ignored)

   SIGTSTP    : constant := 25; --  user stop requested from tty

   SIGCONT    : constant := 26; --  stopped process has been continued

   SIGTTIN    : constant := 27; --  background tty read attempted

   SIGTTOU    : constant := 28; --  background tty write attempted

   SIGURG     : constant := 29; --  urgent condition on IO channel

   SIGLOST    : constant := 30; --  remote lock lost  (NFS)

   SIGDIL     : constant := 32; --  DIL signal

   SIGXCPU    : constant := 33; --  CPU time limit exceeded (setrlimit)

   SIGXFSZ    : constant := 34; --  file size limit exceeded (setrlimit)

   SIGADAABORT : constant := SIGABRT;

   --  Note: on other targets, we usually use SIGABRT, but on HP/UX, it

   --  appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.

   type Signal_Set is array (Natural range <>) of Signal;

   Unmasked    : constant Signal_Set :=

     (SIGBUS, SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP);

   Reserved    : constant Signal_Set := (SIGKILL, SIGSTOP);

   type sigset_t is private;

   type isr_address is access procedure (sig : int);

   pragma Convention (C, isr_address);

   function intr_attach (sig : int; handler : isr_address) return long;

   Intr_Attach_Reset : constant Boolean := True;

   --  True if intr_attach is reset after an interrupt handler is called

   function sigaddset (set : access sigset_t; sig : Signal) return int;

   pragma Import (C, sigaddset, "sigaddset");

   function sigdelset (set : access sigset_t; sig : Signal) return int;

   pragma Import (C, sigdelset, "sigdelset");

   function sigfillset (set : access sigset_t) return int;

   pragma Import (C, sigfillset, "sigfillset");

   function sigismember (set : access sigset_t; sig : Signal) return int;

   pragma Import (C, sigismember, "sigismember");

   function sigemptyset (set : access sigset_t) return int;

   pragma Import (C, sigemptyset, "sigemptyset");

   type Signal_Handler is access procedure (signo : Signal);

   type struct_sigaction is record

      sa_handler : System.Address;

      sa_mask    : sigset_t;

      sa_flags   : int;

   end record;

   pragma Convention (C, struct_sigaction);

   type struct_sigaction_ptr is access all struct_sigaction;

   SA_RESTART  : constant  := 16#40#;

   SA_SIGINFO  : constant  := 16#10#;

   SA_ONSTACK  : constant  := 16#01#;

   SIG_BLOCK   : constant  := 0;

   SIG_UNBLOCK : constant  := 1;

   SIG_SETMASK : constant  := 2;

   SIG_DFL : constant := 0;

   SIG_IGN : constant := 1;

   SIG_ERR : constant := -1;

   function sigaction

     (sig  : Signal;

      act  : struct_sigaction_ptr;

      oact : struct_sigaction_ptr) return int;

   pragma Import (C, sigaction, "sigaction");

   ----------

   -- Time --

   ----------

   type timespec is private;

   function nanosleep (rqtp, rmtp : access timespec) return int;

   pragma Import (C, nanosleep);

   type clockid_t is private;

   CLOCK_REALTIME : constant clockid_t;

   function Clock_Gettime

     (Clock_Id : clockid_t; Tp : access timespec) return int;

   pragma Import (C, Clock_Gettime);

   function To_Duration (TS : timespec) return Duration;

   pragma Inline (To_Duration);

   function To_Timespec (D : Duration) return timespec;

   pragma Inline (To_Timespec);

   -------------------------

   -- Priority Scheduling --

   -------------------------

   SCHED_FIFO  : constant := 0;

   SCHED_RR    : constant := 1;

   SCHED_OTHER : constant := 2;

   -------------

   -- Process --

   -------------

   type pid_t is private;

   function kill (pid : pid_t; sig : Signal) return int;

   pragma Import (C, kill, "kill");

   function getpid return pid_t;

   pragma Import (C, getpid, "getpid");

   -------------

   -- Threads --

   -------------

   type Thread_Body is access

     function (arg : System.Address) return System.Address;

   pragma Convention (C, Thread_Body);

   function Thread_Body_Access is new

     Ada.Unchecked_Conversion (System.Address, Thread_Body);

   type pthread_t           is private;

   subtype Thread_Id        is pthread_t;

   type pthread_mutex_t     is limited private;

   type pthread_cond_t      is limited private;

   type pthread_attr_t      is limited private;

   type pthread_mutexattr_t is limited private;

   type pthread_condattr_t  is limited private;

   type pthread_key_t       is private;

   -----------

   -- Stack --

   -----------

   function Get_Stack_Base (thread : pthread_t) return Address;

   pragma Inline (Get_Stack_Base);

   --  This is a dummy procedure to share some GNULLI files

   ---------------------------------------

   -- Nonstandard Thread Initialization --

   ---------------------------------------

   procedure pthread_init;

   pragma Inline (pthread_init);

   --  This is a dummy procedure to share some GNULLI files

   -------------------------

   -- POSIX.1c  Section 3 --

   -------------------------

   function sigwait (set : access sigset_t) return int;

   pragma Import (C, sigwait, "cma_sigwait");

   function sigwait

     (set : access sigset_t;

      sig : access Signal) return int;

   pragma Inline (sigwait);

   --  DCE_THREADS has a nonstandard sigwait

   function pthread_kill

     (thread : pthread_t;

      sig    : Signal) return int;

   pragma Inline (pthread_kill);

   --  DCE_THREADS doesn't have pthread_kill

   function pthread_sigmask

     (how  : int;

      set  : access sigset_t;

      oset : access sigset_t) return int;

   --  DCE THREADS does not have pthread_sigmask. Instead, it uses sigprocmask

   --  to do the signal handling when the thread library is sucked in.

   pragma Import (C, pthread_sigmask, "sigprocmask");

   --------------------------

   -- POSIX.1c  Section 11 --

   --------------------------

   function pthread_mutexattr_init

     (attr : access pthread_mutexattr_t) return int;

   --  DCE_THREADS has a nonstandard pthread_mutexattr_init

   function pthread_mutexattr_destroy

     (attr : access pthread_mutexattr_t) return int;

   --  DCE_THREADS has a nonstandard pthread_mutexattr_destroy

   function pthread_mutex_init

     (mutex : access pthread_mutex_t;

      attr  : access pthread_mutexattr_t) return int;

   --  DCE_THREADS has a nonstandard pthread_mutex_init

   function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;

   --  DCE_THREADS has a nonstandard pthread_mutex_destroy

   function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;

   pragma Inline (pthread_mutex_lock);

   --  DCE_THREADS has nonstandard pthread_mutex_lock

   function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;

   pragma Inline (pthread_mutex_unlock);

   --  DCE_THREADS has nonstandard pthread_mutex_lock

   function pthread_condattr_init

     (attr : access pthread_condattr_t) return int;

   --  DCE_THREADS has nonstandard pthread_condattr_init

   function pthread_condattr_destroy

     (attr : access pthread_condattr_t) return int;

   --  DCE_THREADS has nonstandard pthread_condattr_destroy

   function pthread_cond_init

     (cond : access pthread_cond_t;

      attr : access pthread_condattr_t) return int;

   --  DCE_THREADS has nonstandard pthread_cond_init

   function pthread_cond_destroy (cond : access pthread_cond_t) return int;

   --  DCE_THREADS has nonstandard pthread_cond_destroy

   function pthread_cond_signal (cond : access pthread_cond_t) return int;

   pragma Inline (pthread_cond_signal);

   --  DCE_THREADS has nonstandard pthread_cond_signal

   function pthread_cond_wait

     (cond  : access pthread_cond_t;

      mutex : access pthread_mutex_t) return int;

   pragma Inline (pthread_cond_wait);

   --  DCE_THREADS has a nonstandard pthread_cond_wait

   function pthread_cond_timedwait

     (cond    : access pthread_cond_t;

      mutex   : access pthread_mutex_t;

      abstime : access timespec) return int;

   pragma Inline (pthread_cond_timedwait);

   --  DCE_THREADS has a nonstandard pthread_cond_timedwait

   --------------------------

   -- POSIX.1c  Section 13 --

   --------------------------

   type struct_sched_param is record

      sched_priority : int;  --  scheduling priority

   end record;

   function pthread_setschedparam

     (thread : pthread_t;

      policy : int;

      param  : access struct_sched_param) return int;

   pragma Inline (pthread_setschedparam);

   --  DCE_THREADS has a nonstandard pthread_setschedparam

   function sched_yield return int;

   pragma Inline (sched_yield);

   --  DCE_THREADS has a nonstandard sched_yield

   ---------------------------

   -- P1003.1c - Section 16 --

   ---------------------------

   function pthread_attr_init (attributes : access pthread_attr_t) return int;

   pragma Inline (pthread_attr_init);

   --  DCE_THREADS has a nonstandard pthread_attr_init

   function pthread_attr_destroy

     (attributes : access pthread_attr_t) return int;

   pragma Inline (pthread_attr_destroy);

   --  DCE_THREADS has a nonstandard pthread_attr_destroy

   function pthread_attr_setstacksize

     (attr      : access pthread_attr_t;

      stacksize : size_t) return int;

   pragma Inline (pthread_attr_setstacksize);

   --  DCE_THREADS has a nonstandard pthread_attr_setstacksize

   function pthread_create

     (thread        : access pthread_t;

      attributes    : access pthread_attr_t;

      start_routine : Thread_Body;

      arg           : System.Address) return int;

   pragma Inline (pthread_create);

   --  DCE_THREADS has a nonstandard pthread_create

   procedure pthread_detach (thread : access pthread_t);

   pragma Import (C, pthread_detach);

   procedure pthread_exit (status : System.Address);

   pragma Import (C, pthread_exit, "pthread_exit");

   function pthread_self return pthread_t;

   pragma Import (C, pthread_self, "pthread_self");

   --------------------------

   -- POSIX.1c  Section 17 --

   --------------------------

   function pthread_setspecific

     (key   : pthread_key_t;

      value : System.Address) return int;

   pragma Inline (pthread_setspecific);

   --  DCE_THREADS has a nonstandard pthread_setspecific

   function pthread_getspecific (key : pthread_key_t) return System.Address;

   pragma Inline (pthread_getspecific);

   --  DCE_THREADS has a nonstandard pthread_getspecific

   type destructor_pointer is access procedure (arg : System.Address);

   pragma Convention (C, destructor_pointer);

   function pthread_key_create

     (key        : access pthread_key_t;

      destructor : destructor_pointer) return int;

   pragma Inline (pthread_key_create);

   --  DCE_THREADS has a nonstandard pthread_key_create

private

   type array_type_1 is array (Integer range 0 .. 7) of unsigned_long;

   type sigset_t is record

      X_X_sigbits : array_type_1;

   end record;

   pragma Convention (C, sigset_t);

   type pid_t is new int;

   type time_t is new long;

   type timespec is record

      tv_sec  : time_t;

      tv_nsec : long;

   end record;

   pragma Convention (C, timespec);

   type clockid_t is new int;

   CLOCK_REALTIME : constant clockid_t := 1;

   type cma_t_address is new System.Address;

   type cma_t_handle is record

      field1 : cma_t_address;

      field2 : Short_Integer;

      field3 : Short_Integer;

   end record;

   for cma_t_handle'Size use 64;

   type pthread_attr_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_attr_t);

   type pthread_condattr_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_condattr_t);

   type pthread_mutexattr_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_mutexattr_t);

   type pthread_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_t);

   type pthread_mutex_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_mutex_t);

   type pthread_cond_t is new cma_t_handle;

   pragma Convention (C_Pass_By_Copy, pthread_cond_t);

   type pthread_key_t is new int;

end System.OS_Interface;