------------------------------------------------------------------------------ -- -- -- GNU ADA 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) 1995-2016, 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 the GNU/kFreeBSD (POSIX Threads) version of this package -- This package encapsulates all direct interfaces to OS services -- that are needed by children of System. -- 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 Interfaces.C; with Unchecked_Conversion; package System.OS_Interface is pragma Preelaborate; pragma Linker_Options ("-lpthread"); 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 := 35; EINTR : constant := 4; EINVAL : constant := 22; ENOMEM : constant := 12; EPERM : constant := 1; ETIMEDOUT : constant := 60; ------------- -- Signals -- ------------- Max_Interrupt : constant := 128; 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) SIGIOT : constant := 6; -- IOT instruction SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future 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) 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 SIGINFO : constant := 29; -- information request (NetBSD/FreeBSD) SIGUSR1 : constant := 30; -- user defined signal 1 SIGUSR2 : constant := 31; -- user defined signal 2 SIGLTHRRES : constant := 32; -- GNU/LinuxThreads restart signal SIGLTHRCAN : constant := 33; -- GNU/LinuxThreads cancel signal SIGLTHRDBG : constant := 34; -- GNU/LinuxThreads debugger signal 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, -- 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 cannot be masked; -- POSIX simply won't allow it. SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG); -- These three signals are used by GNU/LinuxThreads starting from -- glibc 2.1 (future 2.2). Reserved : constant Signal_Set := -- I am not sure why the following signal is reserved. -- I guess they are not supported by this version of GNU/kFreeBSD. (0 .. 0 => SIGVTALRM); 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"); -- sigcontext is architecture dependent, so define it private type struct_sigcontext is private; 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 := 1; SIG_UNBLOCK : constant := 2; SIG_SETMASK : constant := 3; SIG_DFL : constant := 0; SIG_IGN : constant := 1; SA_SIGINFO : constant := 16#0040#; SA_ONSTACK : constant := 16#0001#; 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 (i.e SCHED_RR is supported) type timespec is private; function nanosleep (rqtp, rmtp : access timespec) return int; pragma Import (C, nanosleep, "nanosleep"); type clockid_t is private; CLOCK_REALTIME : constant clockid_t; 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); function sysconf (name : int) return long; pragma Import (C, sysconf); SC_CLK_TCK : constant := 2; SC_NPROCESSORS_ONLN : constant := 84; ------------------------- -- Priority Scheduling -- ------------------------- SCHED_FIFO : constant := 1; SCHED_OTHER : constant := 2; SCHED_RR : constant := 3; 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 Unchecked_Conversion (System.Address, Thread_Body); type pthread_t is new unsigned_long; subtype Thread_Id is pthread_t; function To_pthread_t is new Unchecked_Conversion (unsigned_long, 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; PTHREAD_SCOPE_SYSTEM : constant := 2; -- Read/Write lock not supported on kfreebsd. 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_size : size_t; ss_flags : int; 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"); Alternate_Stack : aliased System.Address; -- This is a dummy definition, never used (Alternate_Stack_Size is null) 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 PROT_NONE : constant := 0; PROT_READ : constant := 1; PROT_WRITE : constant := 2; PROT_EXEC : constant := 4; PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC; PROT_ON : constant := PROT_NONE; 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; pragma Inline (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 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_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"); Relative_Timed_Wait : constant Boolean := False; -- pthread_cond_timedwait requires an absolute delay time -------------------------- -- POSIX.1c Section 13 -- -------------------------- PTHREAD_PRIO_NONE : constant := 0; PTHREAD_PRIO_PROTECT : constant := 2; PTHREAD_PRIO_INHERIT : constant := 1; function pthread_mutexattr_setprotocol (attr : access pthread_mutexattr_t; protocol : int) return int; pragma Import (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol"); function pthread_mutexattr_getprotocol (attr : access pthread_mutexattr_t; protocol : access int) return int; pragma Import (C, pthread_mutexattr_getprotocol, "pthread_mutexattr_getprotocol"); function pthread_mutexattr_setprioceiling (attr : access pthread_mutexattr_t; prioceiling : int) return int; pragma Import (C, pthread_mutexattr_setprioceiling, "pthread_mutexattr_setprioceiling"); function pthread_mutexattr_getprioceiling (attr : access pthread_mutexattr_t; prioceiling : access int) return int; pragma Import (C, pthread_mutexattr_getprioceiling, "pthread_mutexattr_getprioceiling"); type struct_sched_param is record sched_priority : int; -- scheduling priority 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 (attr : access pthread_attr_t; contentionscope : int) return int; pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope"); function pthread_attr_getscope (attr : access pthread_attr_t; contentionscope : access int) return int; pragma Import (C, pthread_attr_getscope, "pthread_attr_getscope"); function pthread_attr_setinheritsched (attr : access pthread_attr_t; inheritsched : int) return int; pragma Import (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched"); function pthread_attr_getinheritsched (attr : access pthread_attr_t; inheritsched : access int) return int; pragma Import (C, pthread_attr_getinheritsched, "pthread_attr_getinheritsched"); 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, "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 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"); CPU_SETSIZE : constant := 1_024; type bit_field is array (1 .. CPU_SETSIZE) of Boolean; for bit_field'Size use CPU_SETSIZE; pragma Pack (bit_field); pragma Convention (C, bit_field); type cpu_set_t is record bits : bit_field; end record; pragma Convention (C, cpu_set_t); function pthread_setaffinity_np (thread : pthread_t; cpusetsize : size_t; cpuset : access cpu_set_t) return int; pragma Import (C, pthread_setaffinity_np, "__gnat_pthread_setaffinity_np"); private type sigset_t is array (1 .. 4) of unsigned; -- In FreeBSD the component sa_handler turns out to -- be one a union type, and the selector is a macro: -- #define sa_handler __sigaction_u._handler -- #define sa_sigaction __sigaction_u._sigaction -- Should we add a signal_context type here ? -- How could it be done independent of the CPU architecture ? -- sigcontext type is opaque, so it is architecturally neutral. -- It is always passed as an access type, so define it as an empty record -- since the contents are not used anywhere. type struct_sigcontext is null record; pragma Convention (C, struct_sigcontext); 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 clockid_t is new int; CLOCK_REALTIME : constant clockid_t := 0; type pthread_attr_t is record detachstate : int; schedpolicy : int; schedparam : struct_sched_param; inheritsched : int; scope : int; guardsize : size_t; stackaddr_set : int; stackaddr : System.Address; stacksize : size_t; end record; pragma Convention (C, pthread_attr_t); type pthread_condattr_t is record dummy : int; end record; pragma Convention (C, pthread_condattr_t); type pthread_mutexattr_t is record mutexkind : int; end record; pragma Convention (C, pthread_mutexattr_t); type struct_pthread_fast_lock is record status : long; spinlock : int; end record; pragma Convention (C, struct_pthread_fast_lock); type pthread_mutex_t is record m_reserved : int; m_count : int; m_owner : System.Address; m_kind : int; m_lock : struct_pthread_fast_lock; end record; pragma Convention (C, pthread_mutex_t); type pthread_cond_t is array (0 .. 47) of unsigned_char; pragma Convention (C, pthread_cond_t); type pthread_key_t is new unsigned; end System.OS_Interface;