------------------------------------------------------------------------------ -- -- -- 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) 1995-2020, 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 QNX/Neutrino 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.OS_Constants; package System.OS_Interface is pragma Preelaborate; 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"); EPERM : constant := 1; EINTR : constant := 4; EAGAIN : constant := 11; ENOMEM : constant := 12; EINVAL : constant := 22; ETIMEDOUT : constant := 260; ------------- -- Signals -- ------------- Max_Interrupt : constant := 64; type Signal is new int range 0 .. Max_Interrupt; for Signal'Size use int'Size; SIGHUP : constant := 1; SIGINT : constant := 2; SIGQUIT : constant := 3; SIGILL : constant := 4; SIGTRAP : constant := 5; SIGIOT : constant := 6; SIGABRT : constant := 6; SIGDEADLK : constant := 7; SIGFPE : constant := 8; SIGKILL : constant := 9; SIGBUS : constant := 10; SIGSEGV : constant := 11; SIGSYS : constant := 12; SIGPIPE : constant := 13; SIGALRM : constant := 14; SIGTERM : constant := 15; SIGUSR1 : constant := 16; SIGUSR2 : constant := 17; SIGCLD : constant := 18; SIGCHLD : constant := 18; SIGPWR : constant := 19; SIGWINCH : constant := 20; SIGURG : constant := 21; SIGPOLL : constant := 22; SIGIO : constant := 22; SIGSTOP : constant := 23; SIGTSTP : constant := 24; SIGCONT : constant := 25; SIGTTIN : constant := 26; SIGTTOU : constant := 27; SIGVTALRM : constant := 28; SIGPROF : constant := 29; SIGXCPU : constant := 30; SIGXFSZ : constant := 31; SIGRTMIN : constant := 41; SITRTMAX : constant := 56; SIGSELECT : constant := 57; SIGPHOTON : constant := 58; SIGADAABORT : constant := SIGABRT; -- Change this 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, -- To enable debugging on multithreaded applications, mark SIGTRAP to -- be kept unmasked. SIGBUS, SIGTTIN, SIGTTOU, SIGTSTP, -- Keep these three signals unmasked so that background processes and IO -- behaves as normal "C" applications SIGPROF, -- To avoid confusing the profiler SIGKILL, SIGSTOP); -- These two signals actually can't be masked (POSIX won't allow it) Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGSEGV); 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 pad7 is array (1 .. 7) of int; type siginfo_t is record si_signo : int; si_code : int; si_errno : int; X_data : pad7; end record; pragma Convention (C, siginfo_t); type struct_sigaction is record sa_handler : System.Address; sa_flags : int; sa_mask : sigset_t; end record; pragma Convention (C, struct_sigaction); type struct_sigaction_ptr is access all struct_sigaction; SIG_BLOCK : constant := 0; SIG_UNBLOCK : constant := 1; SIG_SETMASK : constant := 2; SIG_PENDING : constant := 5; SA_NOCLDSTOP : constant := 16#0001#; SA_SIGINFO : constant := 16#0002#; SA_RESETHAND : constant := 16#0004#; SA_ONSTACK : constant := 16#0008#; SA_NODEFER : constant := 16#0010#; SA_NOCLDWAIT : constant := 16#0020#; SS_ONSTACK : constant := 1; SS_DISABLE : 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); ------------------------- -- Priority Scheduling -- ------------------------- SCHED_FIFO : constant := 1; SCHED_RR : constant := 2; SCHED_OTHER : constant := 3; function To_Target_Priority (Prio : System.Any_Priority) return Interfaces.C.int with Inline_Always; -- 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"); ------------- -- 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 new int; 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_SCOPE_PROCESS : constant := 4; PTHREAD_SCOPE_SYSTEM : constant := 0; PTHREAD_INHERIT_SCHED : constant := 0; PTHREAD_EXPLICIT_SCHED : constant := 2; -- Read/Write lock not supported on Android. 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 with Inline; -- Not supported on QNX Alternate_Stack : aliased System.Address; -- Dummy definition: alternate stack not available due to missing -- sigaltstack in QNX Alternate_Stack_Size : constant := 0; -- This must be kept in sync with init.c:__gnat_alternate_stack Stack_Base_Available : constant Boolean := False; -- Indicates whether the stack base is available on this target function Get_Stack_Base (thread : pthread_t) return System.Address with Inline; -- This is a dummy procedure to share some GNULLI files function Get_Page_Size return int; pragma Import (C, Get_Page_Size, "getpagesize"); -- Returns the size of a page PROT_NONE : constant := 16#00_00#; PROT_READ : constant := 16#01_00#; PROT_WRITE : constant := 16#02_00#; PROT_EXEC : constant := 16#04_00#; 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 with Inline_Always; ------------------------- -- POSIX.1c Section 3 -- ------------------------- function sigwait (set : access sigset_t; sig : access Signal) return int; pragma Import (C, sigwait, "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_mutex_setprioceiling (mutex : access pthread_mutex_t; prioceiling : int; old_ceiling : access int) return int; pragma Import (C, pthread_mutex_setprioceiling); 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_INHERIT : constant := 0; PTHREAD_PRIO_NONE : 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_getprotocol (attr : access pthread_mutexattr_t; protocol : access int) return int; pragma Import (C, pthread_mutexattr_getprotocol); function pthread_mutexattr_setprioceiling (attr : access pthread_mutexattr_t; prioceiling : int) return int; pragma Import (C, pthread_mutexattr_setprioceiling); function pthread_mutexattr_getprioceiling (attr : access pthread_mutexattr_t; prioceiling : access int) return int; pragma Import (C, pthread_mutexattr_getprioceiling); function pthread_mutex_getprioceiling (attr : access pthread_mutex_t; prioceiling : access int) return int; pragma Import (C, pthread_mutex_getprioceiling); type pad8 is array (1 .. 8) of int; pragma Convention (C, pad8); type struct_sched_param is record sched_priority : int := 0; -- scheduling priority sched_curpriority : int := 0; reserved : pad8 := (others => 0); 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_getschedparam (thread : pthread_t; policy : access int; param : access struct_sched_param) return int; pragma Import (C, pthread_getschedparam, "pthread_getschedparam"); function pthread_setschedprio (thread : pthread_t; priority : int) return int; pragma Import (C, pthread_setschedprio); function pthread_attr_setschedparam (attr : access pthread_attr_t; param : access struct_sched_param) return int; pragma Import (C, pthread_attr_setschedparam); function pthread_attr_setinheritsched (attr : access pthread_attr_t; inheritsched : int) return int; pragma Import (C, pthread_attr_setinheritsched); function pthread_attr_setscope (attr : access pthread_attr_t; scope : int) return int; pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope"); function pthread_attr_setschedpolicy (attr : access pthread_attr_t; policy : int) return int; pragma Import (C, pthread_attr_setschedpolicy, "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"); function lwp_self return System.Address; pragma Import (C, lwp_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"); private type sigset_t is array (1 .. 2) of Interfaces.Unsigned_32; 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 unsigned_long_long_t is mod 2 ** 64; -- Local type only used to get the alignment of this type below subtype char_array is Interfaces.C.char_array; type pthread_attr_t is record Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE); end record; pragma Convention (C, pthread_attr_t); for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment; type pthread_condattr_t is record Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE); end record; pragma Convention (C, pthread_condattr_t); for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment; type pthread_mutexattr_t is record Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE); end record; pragma Convention (C, pthread_mutexattr_t); for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment; type pthread_mutex_t is record Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE); end record; pragma Convention (C, pthread_mutex_t); for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment; type pthread_cond_t is record Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE); end record; pragma Convention (C, pthread_cond_t); for pthread_cond_t'Alignment use unsigned_long_long_t'Alignment; type pthread_key_t is new int; end System.OS_Interface;