gcc/ada/s-osinte-kfreebsd-gnu.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                   S Y S T E M . O S _ I N T E R F A C E                  --
   6 --                                                                          --
   7 --                                  S p e c                                 --
   8 --                                                                          --
   9 --             Copyright (C) 1991-1994, Florida State University            --
  10 --             Copyright (C) 1995-2005,2008 Free Software Foundation, Inc.  --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  21 -- Boston, MA 02110-1301, USA.                                              --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is the GNU/kFreeBSD (GNU/LinuxThreads) version of this package
  36
  37 --  This package encapsulates all direct interfaces to OS services
  38 --  that are needed by children of System.
  39
  40 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  41 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
  42
  43 with Interfaces.C;
  44 with Unchecked_Conversion;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-lpthread");
  50
  51    subtype int            is Interfaces.C.int;
  52    subtype char           is Interfaces.C.char;
  53    subtype short          is Interfaces.C.short;
  54    subtype long           is Interfaces.C.long;
  55    subtype unsigned       is Interfaces.C.unsigned;
  56    subtype unsigned_short is Interfaces.C.unsigned_short;
  57    subtype unsigned_long  is Interfaces.C.unsigned_long;
  58    subtype unsigned_char  is Interfaces.C.unsigned_char;
  59    subtype plain_char     is Interfaces.C.plain_char;
  60    subtype size_t         is Interfaces.C.size_t;
  61
  62    -----------
  63    -- Errno --
  64    -----------
  65
  66    function errno return int;
  67    pragma Import (C, errno, "__get_errno");
  68
  69    EAGAIN   : constant := 35;
  70    EINTR    : constant := 4;
  71    EINVAL   : constant := 22;
  72    ENOMEM   : constant := 12;
  73    EPERM    : constant := 1;
  74    ETIMEDOUT    : constant := 60;
  75
  76    -------------
  77    -- Signals --
  78    -------------
  79
  80    Max_Interrupt : constant := 128;
  81    type Signal is new int range 0 .. Max_Interrupt;
  82    for Signal'Size use int'Size;
  83
  84    SIGHUP     : constant := 1; --  hangup
  85    SIGINT     : constant := 2; --  interrupt (rubout)
  86    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  87    SIGILL     : constant := 4; --  illegal instruction (not reset)
  88    SIGTRAP    : constant := 5; --  trace trap (not reset)
  89    SIGIOT     : constant := 6; --  IOT instruction
  90    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  91    SIGEMT     : constant := 7; --  EMT instruction
  92    SIGFPE     : constant := 8; --  floating point exception
  93    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  94    SIGBUS     : constant := 10; --  bus error
  95    SIGSEGV    : constant := 11; --  segmentation violation
  96    SIGSYS     : constant := 12; --  bad argument to system call
  97    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  98    SIGALRM    : constant := 14; --  alarm clock
  99    SIGTERM    : constant := 15; --  software termination signal from kill
 100    SIGURG     : constant := 16; --  urgent condition on IO channel
 101    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
 102    SIGTSTP    : constant := 18; --  user stop requested from tty
 103    SIGCONT    : constant := 19; --  stopped process has been continued
 104    SIGCLD     : constant := 20; --  alias for SIGCHLD
 105    SIGCHLD    : constant := 20; --  child status change
 106    SIGTTIN    : constant := 21; --  background tty read attempted
 107    SIGTTOU    : constant := 22; --  background tty write attempted
 108    SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 109    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 110    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 111    SIGVTALRM  : constant := 26; --  virtual timer expired
 112    SIGPROF    : constant := 27; --  profiling timer expired
 113    SIGWINCH   : constant := 28; --  window size change
 114    SIGINFO    : constant := 29; --  information request (NetBSD/FreeBSD)
 115    SIGUSR1    : constant := 30; --  user defined signal 1
 116    SIGUSR2    : constant := 31; --  user defined signal 2
 117    SIGLTHRRES : constant := 32; --  GNU/LinuxThreads restart signal
 118    SIGLTHRCAN : constant := 33; --  GNU/LinuxThreads cancel signal
 119    SIGLTHRDBG : constant := 34; --  GNU/LinuxThreads debugger signal
 120
 121    SIGADAABORT : constant := SIGABRT;
 122    --  Change this if you want to use another signal for task abort.
 123    --  SIGTERM might be a good one.
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set := (
 128       SIGTRAP,
 129       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 130       --  be kept unmasked.
 131
 132       SIGBUS,
 133
 134       SIGTTIN, SIGTTOU, SIGTSTP,
 135       --  Keep these three signals unmasked so that background processes
 136       --  and IO behaves as normal "C" applications
 137
 138       SIGPROF,
 139       --  To avoid confusing the profiler
 140
 141       SIGKILL, SIGSTOP,
 142       --  These two signals actually cannot be masked;
 143       --  POSIX simply won't allow it.
 144
 145       SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG);
 146       --  These three signals are used by GNU/LinuxThreads starting from
 147       --  glibc 2.1 (future 2.2).
 148
 149    Reserved    : constant Signal_Set :=
 150    --  I am not sure why the following signal is reserved.
 151    --  I guess they are not supported by this version of GNU/kFreeBSD.
 152      (0 .. 0 => SIGVTALRM);
 153
 154    type sigset_t is private;
 155
 156    function sigaddset (set : access sigset_t; sig : Signal) return int;
 157    pragma Import (C, sigaddset, "sigaddset");
 158
 159    function sigdelset (set : access sigset_t; sig : Signal) return int;
 160    pragma Import (C, sigdelset, "sigdelset");
 161
 162    function sigfillset (set : access sigset_t) return int;
 163    pragma Import (C, sigfillset, "sigfillset");
 164
 165    function sigismember (set : access sigset_t; sig : Signal) return int;
 166    pragma Import (C, sigismember, "sigismember");
 167
 168    function sigemptyset (set : access sigset_t) return int;
 169    pragma Import (C, sigemptyset, "sigemptyset");
 170
 171    --  sigcontext is architecture dependent, so define it private
 172    type struct_sigcontext is private;
 173
 174    type struct_sigaction is record
 175       sa_handler : System.Address;
 176       sa_flags   : int;
 177       sa_mask    : sigset_t;
 178    end record;
 179    pragma Convention (C, struct_sigaction);
 180
 181    type struct_sigaction_ptr is access all struct_sigaction;
 182
 183    SIG_BLOCK   : constant := 1;
 184    SIG_UNBLOCK : constant := 2;
 185    SIG_SETMASK : constant := 3;
 186
 187    SIG_DFL : constant := 0;
 188    SIG_IGN : constant := 1;
 189
 190    SA_SIGINFO : constant := 16#0040#;
 191    SA_ONSTACK : constant := 16#0001#;
 192
 193    function sigaction
 194      (sig  : Signal;
 195       act  : struct_sigaction_ptr;
 196       oact : struct_sigaction_ptr) return int;
 197    pragma Import (C, sigaction, "sigaction");
 198
 199    ----------
 200    -- Time --
 201    ----------
 202
 203    type timespec is private;
 204
 205    function To_Duration (TS : timespec) return Duration;
 206    pragma Inline (To_Duration);
 207
 208    function To_Timespec (D : Duration) return timespec;
 209    pragma Inline (To_Timespec);
 210
 211    function sysconf (name : int) return long;
 212    pragma Import (C, sysconf);
 213
 214    SC_CLK_TCK          : constant := 2;
 215    SC_NPROCESSORS_ONLN : constant := 84;
 216
 217    -------------------------
 218    -- Priority Scheduling --
 219    -------------------------
 220
 221    SCHED_FIFO  : constant := 1;
 222    SCHED_OTHER : constant := 2;
 223    SCHED_RR    : constant := 3;
 224
 225    function To_Target_Priority
 226      (Prio : System.Any_Priority) return Interfaces.C.int;
 227    --  Maps System.Any_Priority to a POSIX priority.
 228
 229    -------------
 230    -- Process --
 231    -------------
 232
 233    type pid_t is private;
 234
 235    function kill (pid : pid_t; sig : Signal) return int;
 236    pragma Import (C, kill, "kill");
 237
 238    function getpid return pid_t;
 239    pragma Import (C, getpid, "getpid");
 240
 241    -------------
 242    -- Threads --
 243    -------------
 244
 245    type Thread_Body is access
 246      function (arg : System.Address) return System.Address;
 247    pragma Convention (C, Thread_Body);
 248
 249    function Thread_Body_Access is new
 250      Unchecked_Conversion (System.Address, Thread_Body);
 251
 252    type pthread_t is new unsigned_long;
 253    subtype Thread_Id        is pthread_t;
 254
 255    function To_pthread_t is new Unchecked_Conversion
 256      (unsigned_long, pthread_t);
 257
 258    type pthread_mutex_t     is limited private;
 259    type pthread_cond_t      is limited private;
 260    type pthread_attr_t      is limited private;
 261    type pthread_mutexattr_t is limited private;
 262    type pthread_condattr_t  is limited private;
 263    type pthread_key_t       is private;
 264
 265    PTHREAD_CREATE_DETACHED : constant := 1;
 266
 267    -----------
 268    -- Stack --
 269    -----------
 270
 271    type stack_t is record
 272       ss_sp    : System.Address;
 273       ss_size  : size_t;
 274       ss_flags : int;
 275    end record;
 276    pragma Convention (C, stack_t);
 277
 278    function sigaltstack
 279      (ss  : not null access stack_t;
 280       oss : access stack_t) return int;
 281    pragma Import (C, sigaltstack, "sigaltstack");
 282
 283    Alternate_Stack : aliased System.Address;
 284    --  This is a dummy definition, never used (Alternate_Stack_Size is null)
 285
 286    Alternate_Stack_Size : constant := 0;
 287    --  No alternate signal stack is used on this platform
 288
 289    function Get_Stack_Base (thread : pthread_t) return Address;
 290    pragma Inline (Get_Stack_Base);
 291    --  This is a dummy procedure to share some GNULLI files
 292
 293    ---------------------------------------
 294    -- Nonstandard Thread Initialization --
 295    ---------------------------------------
 296
 297    procedure pthread_init;
 298    pragma Inline (pthread_init);
 299    --  This is a dummy procedure to share some GNULLI files
 300
 301    -------------------------
 302    -- POSIX.1c  Section 3 --
 303    -------------------------
 304
 305    function sigwait (set : access sigset_t; sig : access Signal) return int;
 306    pragma Import (C, sigwait, "sigwait");
 307
 308    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 309    pragma Import (C, pthread_kill, "pthread_kill");
 310
 311    function pthread_sigmask
 312      (how  : int;
 313       set  : access sigset_t;
 314       oset : access sigset_t) return int;
 315    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 316
 317    --------------------------
 318    -- POSIX.1c  Section 11 --
 319    --------------------------
 320
 321    function pthread_mutexattr_init
 322      (attr : access pthread_mutexattr_t) return int;
 323    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 324
 325    function pthread_mutexattr_destroy
 326      (attr : access pthread_mutexattr_t) return int;
 327    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 328
 329    function pthread_mutex_init
 330      (mutex : access pthread_mutex_t;
 331       attr  : access pthread_mutexattr_t) return int;
 332    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 333
 334    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 335    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 336
 337    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 338    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 339
 340    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 341    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 342
 343    function pthread_condattr_init
 344      (attr : access pthread_condattr_t) return int;
 345    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 346
 347    function pthread_condattr_destroy
 348      (attr : access pthread_condattr_t) return int;
 349    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 350
 351    function pthread_cond_init
 352      (cond : access pthread_cond_t;
 353       attr : access pthread_condattr_t) return int;
 354    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 355
 356    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 357    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 358
 359    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 360    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 361
 362    function pthread_cond_wait
 363      (cond  : access pthread_cond_t;
 364       mutex : access pthread_mutex_t) return int;
 365    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 366
 367    function pthread_cond_timedwait
 368      (cond    : access pthread_cond_t;
 369       mutex   : access pthread_mutex_t;
 370       abstime : access timespec) return int;
 371    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 372
 373    Relative_Timed_Wait : constant Boolean := False;
 374    --  pthread_cond_timedwait requires an absolute delay time
 375
 376    --------------------------
 377    -- POSIX.1c  Section 13 --
 378    --------------------------
 379
 380    type struct_sched_param is record
 381       sched_priority : int;  --  scheduling priority
 382    end record;
 383    pragma Convention (C, struct_sched_param);
 384
 385    function pthread_setschedparam
 386      (thread : pthread_t;
 387       policy : int;
 388       param  : access struct_sched_param) return int;
 389    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 390
 391    function pthread_attr_setschedpolicy
 392      (attr   : access pthread_attr_t;
 393       policy : int) return int;
 394    pragma Import
 395      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 396
 397    function sched_yield return int;
 398    pragma Import (C, sched_yield, "sched_yield");
 399
 400    ---------------------------
 401    -- P1003.1c - Section 16 --
 402    ---------------------------
 403
 404    function pthread_attr_init
 405      (attributes : access pthread_attr_t) return int;
 406    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 407
 408    function pthread_attr_destroy
 409      (attributes : access pthread_attr_t) return int;
 410    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 411
 412    function pthread_attr_setdetachstate
 413      (attr        : access pthread_attr_t;
 414       detachstate : int) return int;
 415    pragma Import
 416      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 417
 418    function pthread_attr_setstacksize
 419      (attr      : access pthread_attr_t;
 420       stacksize : size_t) return int;
 421    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 422
 423    function pthread_create
 424      (thread        : access pthread_t;
 425       attributes    : access pthread_attr_t;
 426       start_routine : Thread_Body;
 427       arg           : System.Address) return int;
 428    pragma Import (C, pthread_create, "pthread_create");
 429
 430    procedure pthread_exit (status : System.Address);
 431    pragma Import (C, pthread_exit, "pthread_exit");
 432
 433    function pthread_self return pthread_t;
 434    pragma Import (C, pthread_self, "pthread_self");
 435
 436    --------------------------
 437    -- POSIX.1c  Section 17 --
 438    --------------------------
 439
 440    function pthread_setspecific
 441      (key   : pthread_key_t;
 442       value : System.Address) return int;
 443    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 444
 445    function pthread_getspecific (key : pthread_key_t) return System.Address;
 446    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 447
 448    type destructor_pointer is access procedure (arg : System.Address);
 449    pragma Convention (C, destructor_pointer);
 450
 451    function pthread_key_create
 452      (key        : access pthread_key_t;
 453       destructor : destructor_pointer) return int;
 454    pragma Import (C, pthread_key_create, "pthread_key_create");
 455
 456    CPU_SETSIZE : constant := 1_024;
 457
 458    type bit_field is array (1 .. CPU_SETSIZE) of Boolean;
 459    for bit_field'Size use CPU_SETSIZE;
 460    pragma Pack (bit_field);
 461    pragma Convention (C, bit_field);
 462
 463    type cpu_set_t is record
 464       bits : bit_field;
 465    end record;
 466    pragma Convention (C, cpu_set_t);
 467
 468    function pthread_setaffinity_np
 469      (thread     : pthread_t;
 470       cpusetsize : size_t;
 471       cpuset     : access cpu_set_t) return int;
 472    pragma Import (C, pthread_setaffinity_np, "__gnat_pthread_setaffinity_np");
 473
 474 private
 475
 476    type sigset_t is array (1 .. 4) of unsigned;
 477
 478    --  In FreeBSD the component sa_handler turns out to
 479    --  be one a union type, and the selector is a macro:
 480    --  #define sa_handler __sigaction_u._handler
 481    --  #define sa_sigaction __sigaction_u._sigaction
 482
 483    --  Should we add a signal_context type here ?
 484    --  How could it be done independent of the CPU architecture ?
 485    --  sigcontext type is opaque, so it is architecturally neutral.
 486    --  It is always passed as an access type, so define it as an empty record
 487    --  since the contents are not used anywhere.
 488    type struct_sigcontext is null record;
 489    pragma Convention (C, struct_sigcontext);
 490
 491    type pid_t is new int;
 492
 493    type time_t is new long;
 494
 495    type timespec is record
 496       tv_sec  : time_t;
 497       tv_nsec : long;
 498    end record;
 499    pragma Convention (C, timespec);
 500
 501    type pthread_attr_t is record
 502       detachstate   : int;
 503       schedpolicy   : int;
 504       schedparam    : struct_sched_param;
 505       inheritsched  : int;
 506       scope         : int;
 507       guardsize     : size_t;
 508       stackaddr_set : int;
 509       stackaddr     : System.Address;
 510       stacksize     : size_t;
 511    end record;
 512    pragma Convention (C, pthread_attr_t);
 513
 514    type pthread_condattr_t is record
 515       dummy : int;
 516    end record;
 517    pragma Convention (C, pthread_condattr_t);
 518
 519    type pthread_mutexattr_t is record
 520       mutexkind : int;
 521    end record;
 522    pragma Convention (C, pthread_mutexattr_t);
 523
 524    type struct_pthread_fast_lock is record
 525       status   : long;
 526       spinlock : int;
 527    end record;
 528    pragma Convention (C, struct_pthread_fast_lock);
 529
 530    type pthread_mutex_t is record
 531       m_reserved : int;
 532       m_count    : int;
 533       m_owner    : System.Address;
 534       m_kind     : int;
 535       m_lock     : struct_pthread_fast_lock;
 536    end record;
 537    pragma Convention (C, pthread_mutex_t);
 538
 539    type pthread_cond_t is array (0 .. 47) of unsigned_char;
 540    pragma Convention (C, pthread_cond_t);
 541
 542    type pthread_key_t is new unsigned;
 543
 544 end System.OS_Interface;