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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 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 private; CLOCK_REALTIME : constant clockid_t; 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 clockid_t is new unsigned_char; CLOCK_REALTIME : constant clockid_t := 0; 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;