------------------------------------------------------------------------------ -- -- -- 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) 1995-2019, 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 -- -- . -- -- -- -- GNARL was developed by the GNARL team at Florida State University. -- -- Extensive contributions were provided by Ada Core Technologies, Inc. -- -- -- ------------------------------------------------------------------------------ -- This is a LynxOS-178 Elf (POSIX-8 Threads) 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; with System.Multiprocessors; package System.OS_Interface is pragma Preelaborate; pragma Linker_Options ("-mthreads"); -- Selects the POSIX 1.c runtime, rather than the non-threading runtime or -- the deprecated legacy threads library. 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; subtype int64 is Interfaces.Integer_64; ----------- -- 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; -- Error codes ------------- -- Signals -- ------------- Max_Interrupt : constant := 63; -- Max_Interrupt is the number of OS signals, as defined in: -- -- /usr/include/sys/signal.h -- -- The lowest numbered signal is 1, but 0 is a valid argument to some -- library functions, e.g. kill(2). However, 0 is not just another signal: -- For instance 'I in Signal' and similar should be used with caution. 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 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 SIGTHREADKILL : constant := 24; -- Reserved by LynxOS runtime 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, SIGTHREADKILL); 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#; SA_ONSTACK : constant := 16#00#; -- SA_ONSTACK is not defined on LynxOS, but it is referred to in the POSIX -- implementation of System.Interrupt_Management. Therefore we define a -- dummy value of zero here so that setting this flag is a nop. 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 Import (C, clock_gettime, "clock_gettime"); function clock_getres (clock_id : clockid_t; res : access timespec) return int; pragma Import (C, clock_getres, "clock_getres"); 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; type struct_timeval is private; ------------------------- -- Priority Scheduling -- ------------------------- SCHED_RR : constant := 16#100_000#; SCHED_FIFO : constant := 16#200_000#; SCHED_OTHER : constant := 16#400_000#; 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 -- --------- type pthread_t is private; function lwp_self return pthread_t; 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); 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; PTHREAD_CREATE_DETACHED : constant := 1; PTHREAD_CREATE_JOINABLE : constant := 0; PTHREAD_SCOPE_PROCESS : constant := 0; -- not supported by LynxOS178 PTHREAD_SCOPE_SYSTEM : constant := 1; -- Read/Write lock not supported on LynxOS. To add support both types -- pthread_rwlock_t and pthread_rwlockattr_t must properly be defined -- with the associated routines pthread_rwlock_[init/destroy] and -- pthread_rwlock_[rdlock/wrlock/unlock]. subtype pthread_rwlock_t is pthread_mutex_t; subtype pthread_rwlockattr_t is pthread_mutexattr_t; ----------- -- Stack -- ----------- type stack_t is record ss_sp : System.Address; ss_flags : int; ss_size : size_t; 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"); -- Neither stack_t nor sigaltstack are available on LynxOS-178 Alternate_Stack : aliased System.Address; -- This is a dummy definition, never used (Alternate_Stack_Size is 0) 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 int; -- Returns the size of a page in bytes PROT_NONE : constant := 1; PROT_READ : constant := 2; PROT_WRITE : constant := 4; PROT_EXEC : constant := 8; PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC; 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); --------------------------------------- -- Nonstandard Thread Initialization -- --------------------------------------- procedure pthread_init; -- This is a dummy procedure to share some GNULLI files ------------------------- -- 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, "pthread_sigmask"); ---------------------------- -- POSIX.1c Section 11 -- ---------------------------- function pthread_mutexattr_init (attr : access pthread_mutexattr_t) return int; pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init"); function pthread_mutexattr_destroy (attr : access pthread_mutexattr_t) return int; pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy"); function pthread_mutex_init (mutex : access pthread_mutex_t; attr : access pthread_mutexattr_t) return int; pragma Import (C, pthread_mutex_init, "pthread_mutex_init"); function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int; pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy"); function pthread_mutex_lock (mutex : access pthread_mutex_t) return int; pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock"); function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int; pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock"); function pthread_condattr_init (attr : access pthread_condattr_t) return int; pragma Import (C, pthread_condattr_init, "pthread_condattr_init"); function pthread_condattr_destroy (attr : access pthread_condattr_t) return int; pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy"); function pthread_cond_init (cond : access pthread_cond_t; attr : access pthread_condattr_t) return int; pragma Import (C, pthread_cond_init, "pthread_cond_init"); function pthread_cond_destroy (cond : access pthread_cond_t) return int; pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy"); function pthread_cond_signal (cond : access pthread_cond_t) return int; pragma Import (C, pthread_cond_signal, "pthread_cond_signal"); function pthread_cond_wait (cond : access pthread_cond_t; mutex : access pthread_mutex_t) return int; pragma Import (C, pthread_cond_wait, "pthread_cond_wait"); function pthread_cond_timedwait (cond : access pthread_cond_t; mutex : access pthread_mutex_t; abstime : access timespec) return int; pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait"); -------------------------- -- POSIX.1c Section 13 -- -------------------------- PTHREAD_PRIO_NONE : constant := 0; PTHREAD_PRIO_INHERIT : constant := 1; PTHREAD_PRIO_PROTECT : constant := 2; function pthread_mutexattr_setprotocol (attr : access pthread_mutexattr_t; protocol : int) return int; pragma Import (C, pthread_mutexattr_setprotocol); function pthread_mutexattr_setprioceiling (attr : access pthread_mutexattr_t; prioceiling : int) return int; pragma Import (C, pthread_mutexattr_setprioceiling); type struct_sched_param is record sched_priority : int; end record; pragma Convention (C, struct_sched_param); function pthread_setschedparam (thread : pthread_t; policy : int; param : access struct_sched_param) return int; pragma Import (C, pthread_setschedparam, "pthread_setschedparam"); function pthread_attr_setscope (Unused_attr : access pthread_attr_t; Unused_contentionscope : int) return int is (0); -- pthread_attr_setscope is not implemented in production mode function pthread_attr_setinheritsched (attr : access pthread_attr_t; inheritsched : int) return int; pragma Import (C, pthread_attr_setinheritsched); function pthread_attr_setschedpolicy (attr : access pthread_attr_t; policy : int) return int; pragma Import (C, pthread_attr_setschedpolicy); function sched_yield return int; pragma Import (C, sched_yield, "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_init"); function pthread_attr_destroy (attributes : access pthread_attr_t) return int; pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy"); function pthread_attr_setdetachstate (attr : access pthread_attr_t; detachstate : int) return int; pragma Import (C, pthread_attr_setdetachstate); function pthread_attr_setstacksize (attr : access pthread_attr_t; stacksize : size_t) return int; pragma Import (C, 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 Import (C, pthread_create, "pthread_create"); 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 Import (C, pthread_setspecific, "pthread_setspecific"); 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); pragma Convention (C, destructor_pointer); function pthread_key_create (key : access pthread_key_t; destructor : destructor_pointer ) return int; pragma Import (C, pthread_key_create, "pthread_key_create"); --------------------- -- Multiprocessors -- --------------------- function Current_CPU return Multiprocessors.CPU; -- Return the id of the current CPU function Get_Affinity (Id : Thread_Id) return Multiprocessors.CPU_Range; -- Return CPU affinity of the given thread (maybe Not_A_Specific_CPU) function Get_CPU (Id : Thread_Id) return Multiprocessors.CPU; -- Return the CPU in charge of the given thread (always a valid CPU) private type sigset_t is array (1 .. 2) of long; pragma Convention (C, sigset_t); type pid_t is new long; type time_t is new int64; type suseconds_t is new int; type timespec is record tv_sec : time_t; tv_nsec : long; end record; pragma Convention (C, timespec); type struct_timeval is record tv_sec : time_t; tv_usec : suseconds_t; end record; pragma Convention (C, struct_timeval); type st_attr is record stksize : int; prio : int; inheritsched : int; state : int; sched : int; detachstate : int; guardsize : int; end record; pragma Convention (C, st_attr); subtype st_attr_t is st_attr; type pthread_attr_t is record pthread_attr_magic : unsigned; st : st_attr_t; pthread_attr_scope : int; end record; pragma Convention (C, pthread_attr_t); type pthread_condattr_t is record cv_magic : unsigned; cv_pshared : unsigned; end record; pragma Convention (C, pthread_condattr_t); type pthread_mutexattr_t is record m_flags : unsigned; m_prio_c : int; m_pshared : int; end record; pragma Convention (C, pthread_mutexattr_t); type tid_t is new short; type pthread_t is new tid_t; type block_obj_t is record b_head : int; end record; pragma Convention (C, block_obj_t); type pthread_mutex_t is record m_flags : unsigned; m_owner : tid_t; m_wait : block_obj_t; m_prio_c : int; m_oldprio : int; m_count : int; m_referenced : int; end record; pragma Convention (C, pthread_mutex_t); type pthread_mutex_t_ptr is access all pthread_mutex_t; type pthread_cond_t is record cv_magic : unsigned; cv_wait : block_obj_t; cv_mutex : pthread_mutex_t_ptr; cv_refcnt : int; end record; pragma Convention (C, pthread_cond_t); type pthread_key_t is new int; end System.OS_Interface;