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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME 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) 1995-2011, 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 3, 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is a LynxOS (Native) 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 ("-mthreads");
+
+ subtype int is Interfaces.C.int;
+ subtype char is Interfaces.C.char;
+ 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;
+ ETIMEDOUT : constant := 60;
+
+ -------------
+ -- Signals --
+ -------------
+
+ Max_Interrupt : constant := 63;
+ 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)
+ SIGBRK : constant := 6; -- break
+ SIGIOT : constant := 6; -- IOT instruction
+ SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
+ SIGCORE : constant := 7; -- kill with core dump
+ 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
+ SIGURG : constant := 16; -- urgent condition on IO channel
+ SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
+ SIGTSTP : constant := 18; -- user stop requested from tty
+ SIGCONT : constant := 19; -- stopped process has been continued
+ SIGCLD : constant := 20; -- alias for SIGCHLD
+ SIGCHLD : constant := 20; -- child status change
+ SIGTTIN : constant := 21; -- background tty read attempted
+ SIGTTOU : constant := 22; -- background tty write attempted
+ SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
+ SIGPOLL : constant := 23; -- pollable event occurred
+ SIGXCPU : constant := 24; -- CPU time limit exceeded
+ SIGXFSZ : constant := 25; -- filesize limit exceeded
+ SIGVTALRM : constant := 26; -- virtual timer expired
+ SIGPROF : constant := 27; -- profiling timer expired
+ SIGWINCH : constant := 28; -- window size change
+ SIGLOST : constant := 29; -- SUN 4.1 compatibility
+ SIGUSR1 : constant := 30; -- user defined signal 1
+ SIGUSR2 : constant := 31; -- user defined signal 2
+ SIGPRIO : constant := 32; -- sent to a process with its priority or
+ -- group is changed
+
+ SIGADAABORT : constant := SIGABRT;
+ -- Change this if you want to use another signal for task abort.
+ -- SIGTERM might be a good one.
+
+ 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, SIGPRIO);
+
+ type sigset_t is private;
+
+ 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 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_SIGINFO : constant := 16#80#;
+
+ SIG_BLOCK : constant := 0;
+ SIG_UNBLOCK : constant := 1;
+ SIG_SETMASK : constant := 2;
+
+ SIG_DFL : constant := 0;
+ SIG_IGN : constant := 1;
+
+ function sigaction
+ (sig : Signal;
+ act : struct_sigaction_ptr;
+ oact : struct_sigaction_ptr) return int;
+ pragma Import (C, sigaction, "sigaction");
+
+ ----------
+ -- Time --
+ ----------
+
+ Time_Slice_Supported : constant Boolean := True;
+ -- Indicates whether time slicing is supported
+
+ type timespec is private;
+
+ type clockid_t is new int;
+
+ function clock_gettime
+ (clock_id : clockid_t;
+ tp : access timespec) return int;
+ pragma Inline (clock_gettime);
+ -- LynxOS has non standard clock_gettime
+
+ function To_Duration (TS : timespec) return Duration;
+ pragma Inline (To_Duration);
+
+ function To_Timespec (D : Duration) return timespec;
+ pragma Inline (To_Timespec);
+
+ type struct_timezone is record
+ tz_minuteswest : int;
+ tz_dsttime : int;
+ end record;
+ pragma Convention (C, struct_timezone);
+ type struct_timezone_ptr is access all struct_timezone;
+
+ -------------------------
+ -- Priority Scheduling --
+ -------------------------
+
+ SCHED_FIFO : constant := 16#00200000#;
+ SCHED_RR : constant := 16#00100000#;
+ SCHED_OTHER : constant := 16#00400000#;
+
+ function To_Target_Priority
+ (Prio : System.Any_Priority) return Interfaces.C.int;
+ -- Maps System.Any_Priority to a POSIX priority
+
+ -------------
+ -- 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");
+
+ ---------
+ -- LWP --
+ ---------
+
+ function lwp_self return System.Address;
+ -- lwp_self does not exist on this thread library, revert to pthread_self
+ -- which is the closest approximation (with getpid). This function is
+ -- needed to share 7staprop.adb across POSIX-like targets.
+ pragma Import (C, lwp_self, "pthread_self");
+
+ -------------
+ -- 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 st_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;
+
+ PTHREAD_CREATE_DETACHED : constant := 0;
+
+ PTHREAD_SCOPE_PROCESS : constant := 0;
+ PTHREAD_SCOPE_SYSTEM : constant := 1;
+
+ -----------
+ -- Stack --
+ -----------
+
+ Alternate_Stack_Size : constant := 0;
+ -- No alternate signal stack is used on this platform
+
+ Stack_Base_Available : constant Boolean := False;
+ -- 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.
+
+ 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
+
+ PROT_NONE : constant := 0;
+ PROT_READ : constant := 1;
+ PROT_WRITE : constant := 2;
+ PROT_EXEC : constant := 4;
+ PROT_USER : constant := 8;
+ PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER;
+
+ PROT_ON : constant := PROT_READ;
+ PROT_OFF : constant := PROT_ALL;
+
+ function mprotect (addr : Address; len : size_t; prot : int) return int;
+ pragma Import (C, mprotect);
+
+ -------------------------
+ -- POSIX.1c Section 3 --
+ -------------------------
+
+ function sigwait
+ (set : access sigset_t;
+ sig : access Signal) return int;
+ pragma Inline (sigwait);
+ -- LynxOS has non standard sigwait
+
+ function pthread_kill (thread : pthread_t; sig : Signal) return int;
+ pragma Import (C, pthread_kill, "pthread_kill");
+
+ function pthread_sigmask
+ (how : int;
+ set : access sigset_t;
+ oset : access sigset_t) return int;
+ pragma Import (C, pthread_sigmask, "sigprocmask");
+
+ --------------------------
+ -- POSIX.1c Section 11 --
+ --------------------------
+
+ function pthread_mutexattr_init
+ (attr : access pthread_mutexattr_t) return int;
+ pragma Inline (pthread_mutexattr_init);
+ -- LynxOS has a nonstandard pthread_mutexattr_init
+
+ function pthread_mutexattr_destroy
+ (attr : access pthread_mutexattr_t) return int;
+ pragma Inline (pthread_mutexattr_destroy);
+ -- Lynxos has a nonstandard pthread_mutexattr_destroy
+
+ function pthread_mutex_init
+ (mutex : access pthread_mutex_t;
+ attr : access pthread_mutexattr_t) return int;
+ pragma Inline (pthread_mutex_init);
+ -- LynxOS has a nonstandard pthread_mutex_init
+
+ function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
+ pragma Inline (pthread_mutex_destroy);
+ -- LynxOS has a nonstandard pthread_mutex_destroy
+
+ function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
+ pragma Inline (pthread_mutex_lock);
+ -- LynxOS has a nonstandard pthread_mutex_lock
+
+ function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
+ pragma Inline (pthread_mutex_unlock);
+ -- LynxOS has a nonstandard pthread_mutex_unlock
+
+ function pthread_condattr_init
+ (attr : access pthread_condattr_t) return int;
+ pragma Inline (pthread_condattr_init);
+ -- LynxOS has a nonstandard pthread_condattr_init
+
+ function pthread_condattr_destroy
+ (attr : access pthread_condattr_t) return int;
+ pragma Inline (pthread_condattr_destroy);
+ -- LynxOS has a nonstandard pthread_condattr_destroy
+
+ function pthread_cond_init
+ (cond : access pthread_cond_t;
+ attr : access pthread_condattr_t) return int;
+ pragma Inline (pthread_cond_init);
+ -- LynxOS has a non standard pthread_cond_init
+
+ function pthread_cond_destroy (cond : access pthread_cond_t) return int;
+ pragma Inline (pthread_cond_destroy);
+ -- LynxOS has a nonstandard pthread_cond_destroy
+
+ function pthread_cond_signal (cond : access pthread_cond_t) return int;
+ pragma Inline (pthread_cond_signal);
+ -- LynxOS has a 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);
+ -- LynxOS has a nonstandard pthread_cond_wait
+
+ function pthread_cond_timedwait
+ (cond : access pthread_cond_t;
+ mutex : access pthread_mutex_t;
+ reltime : access timespec) return int;
+ pragma Inline (pthread_cond_timedwait);
+ -- LynxOS has a nonstandard pthread_cond_timedwait
+
+ Relative_Timed_Wait : constant Boolean := True;
+ -- pthread_cond_timedwait requires a relative delay time
+
+ --------------------------
+ -- POSIX.1c Section 13 --
+ --------------------------
+
+ PTHREAD_PRIO_NONE : constant := 0;
+ PTHREAD_PRIO_INHERIT : constant := 0;
+ PTHREAD_PRIO_PROTECT : constant := 0;
+
+ 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);
+ -- LynxOS doesn't have pthread_setschedparam.
+ -- Instead, use pthread_setscheduler
+
+ function pthread_mutexattr_setprotocol
+ (attr : access pthread_mutexattr_t;
+ protocol : int) return int;
+ pragma Inline (pthread_mutexattr_setprotocol);
+ -- LynxOS doesn't have pthread_mutexattr_setprotocol
+
+ function pthread_mutexattr_setprioceiling
+ (attr : access pthread_mutexattr_t;
+ prioceiling : int) return int;
+ pragma Inline (pthread_mutexattr_setprioceiling);
+ -- LynxOS doesn't have pthread_mutexattr_setprioceiling
+
+ function pthread_attr_setscope
+ (attr : access pthread_attr_t;
+ contentionscope : int) return int;
+ -- LynxOS doesn't have pthread_attr_setscope: all threads have system scope
+ pragma Inline (pthread_attr_setscope);
+
+ function pthread_attr_setschedpolicy
+ (attr : access pthread_attr_t;
+ policy : int) return int;
+ pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
+
+ function sched_yield return int;
+ -- pragma Import (C, sched_yield, "sched_yield");
+ pragma Inline (sched_yield);
+
+ ---------------------------
+ -- P1003.1c - Section 16 --
+ ---------------------------
+
+ function pthread_attr_init (attributes : access pthread_attr_t) return int;
+ pragma Import (C, pthread_attr_init, "pthread_attr_create");
+
+ function pthread_attr_destroy
+ (attributes : access pthread_attr_t) return int;
+ pragma Import (C, pthread_attr_destroy, "pthread_attr_delete");
+
+ function pthread_attr_setdetachstate
+ (attr : access pthread_attr_t;
+ detachstate : int) return int;
+ pragma Inline (pthread_attr_setdetachstate);
+ -- LynxOS doesn't have pthread_attr_setdetachstate
+
+ function pthread_attr_setstacksize
+ (attr : access pthread_attr_t;
+ stacksize : size_t) return int;
+ pragma Import (C, pthread_attr_setstacksize, "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);
+ -- LynxOS has a non standard pthread_create
+
+ function pthread_detach (thread : pthread_t) return int;
+ pragma Inline (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);
+ -- LynxOS has a non standard pthread_setspecific
+
+ function pthread_getspecific (key : pthread_key_t) return System.Address;
+ pragma Inline (pthread_getspecific);
+ -- LynxOS has a non standard 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);
+ -- LynxOS has a non standard pthread_keycreate
+
+ procedure pthread_init;
+ -- This is a dummy procedure to share some GNULLI files
+
+private
+
+ type sigbit_array is array (1 .. 2) of long;
+ type sigset_t is record
+ sa_sigbits : sigbit_array;
+ end record;
+ pragma Convention (C_Pass_By_Copy, sigset_t);
+
+ type pid_t is new long;
+
+ type time_t is new long;
+
+ type timespec is record
+ tv_sec : time_t;
+ tv_nsec : long;
+ end record;
+ pragma Convention (C, timespec);
+
+ type st_t is record
+ stksize : int;
+ prio : int;
+ inheritsched : int;
+ state : int;
+ sched : int;
+ end record;
+ pragma Convention (C, st_t);
+
+ type pthread_attr_t is record
+ st : st_t;
+ pthread_attr_scope : int; -- ignored
+ end record;
+ pragma Convention (C, pthread_attr_t);
+
+ type pthread_condattr_t is new int;
+
+ type pthread_mutexattr_t is new int;
+
+ type tid_t is new short;
+ type pthread_t is new tid_t;
+
+ type synch_ptr is access all pthread_mutex_t;
+ type pthread_mutex_t is record
+ w_count : int;
+ mut_owner : int;
+ id : unsigned;
+ next : synch_ptr;
+ end record;
+ pragma Convention (C, pthread_mutex_t);
+
+ type pthread_cond_t is new pthread_mutex_t;
+
+ type pthread_key_t is new int;
+
+end System.OS_Interface;