| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1995-2022, 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/>. -- |
| -- -- |
| -- 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; |
| with System.Parameters; |
| |
| 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 range -2 ** (System.Parameters.time_t_bits - 1) |
| .. 2 ** (System.Parameters.time_t_bits - 1) - 1; |
| |
| 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; |
