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) 1995-2014, Free Software Foundation, Inc.       --
  11 --                                                                          --
  12 -- GNAT 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 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT 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.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNARL was developed by the GNARL team at Florida State University.       --
  29 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This is the GNU/kFreeBSD (GNU/LinuxThreads) version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services
  36 --  that are needed by children of System.
  37
  38 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  39 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
  40
  41 with Interfaces.C;
  42 with Unchecked_Conversion;
  43
  44 package System.OS_Interface is
  45    pragma Preelaborate;
  46
  47    pragma Linker_Options ("-lpthread");
  48
  49    subtype int            is Interfaces.C.int;
  50    subtype char           is Interfaces.C.char;
  51    subtype short          is Interfaces.C.short;
  52    subtype long           is Interfaces.C.long;
  53    subtype unsigned       is Interfaces.C.unsigned;
  54    subtype unsigned_short is Interfaces.C.unsigned_short;
  55    subtype unsigned_long  is Interfaces.C.unsigned_long;
  56    subtype unsigned_char  is Interfaces.C.unsigned_char;
  57    subtype plain_char     is Interfaces.C.plain_char;
  58    subtype size_t         is Interfaces.C.size_t;
  59
  60    -----------
  61    -- Errno --
  62    -----------
  63
  64    function errno return int;
  65    pragma Import (C, errno, "__get_errno");
  66
  67    EAGAIN   : constant := 35;
  68    EINTR    : constant := 4;
  69    EINVAL   : constant := 22;
  70    ENOMEM   : constant := 12;
  71    EPERM    : constant := 1;
  72    ETIMEDOUT    : constant := 60;
  73
  74    -------------
  75    -- Signals --
  76    -------------
  77
  78    Max_Interrupt : constant := 128;
  79    type Signal is new int range 0 .. Max_Interrupt;
  80    for Signal'Size use int'Size;
  81
  82    SIGHUP     : constant := 1; --  hangup
  83    SIGINT     : constant := 2; --  interrupt (rubout)
  84    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  85    SIGILL     : constant := 4; --  illegal instruction (not reset)
  86    SIGTRAP    : constant := 5; --  trace trap (not reset)
  87    SIGIOT     : constant := 6; --  IOT instruction
  88    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  89    SIGEMT     : constant := 7; --  EMT instruction
  90    SIGFPE     : constant := 8; --  floating point exception
  91    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  92    SIGBUS     : constant := 10; --  bus error
  93    SIGSEGV    : constant := 11; --  segmentation violation
  94    SIGSYS     : constant := 12; --  bad argument to system call
  95    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  96    SIGALRM    : constant := 14; --  alarm clock
  97    SIGTERM    : constant := 15; --  software termination signal from kill
  98    SIGURG     : constant := 16; --  urgent condition on IO channel
  99    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
 100    SIGTSTP    : constant := 18; --  user stop requested from tty
 101    SIGCONT    : constant := 19; --  stopped process has been continued
 102    SIGCLD     : constant := 20; --  alias for SIGCHLD
 103    SIGCHLD    : constant := 20; --  child status change
 104    SIGTTIN    : constant := 21; --  background tty read attempted
 105    SIGTTOU    : constant := 22; --  background tty write attempted
 106    SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 107    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 108    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 109    SIGVTALRM  : constant := 26; --  virtual timer expired
 110    SIGPROF    : constant := 27; --  profiling timer expired
 111    SIGWINCH   : constant := 28; --  window size change
 112    SIGINFO    : constant := 29; --  information request (NetBSD/FreeBSD)
 113    SIGUSR1    : constant := 30; --  user defined signal 1
 114    SIGUSR2    : constant := 31; --  user defined signal 2
 115    SIGLTHRRES : constant := 32; --  GNU/LinuxThreads restart signal
 116    SIGLTHRCAN : constant := 33; --  GNU/LinuxThreads cancel signal
 117    SIGLTHRDBG : constant := 34; --  GNU/LinuxThreads debugger signal
 118
 119    SIGADAABORT : constant := SIGABRT;
 120    --  Change this if you want to use another signal for task abort.
 121    --  SIGTERM might be a good one.
 122
 123    type Signal_Set is array (Natural range <>) of Signal;
 124
 125    Unmasked    : constant Signal_Set := (
 126       SIGTRAP,
 127       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 128       --  be kept unmasked.
 129
 130       SIGBUS,
 131
 132       SIGTTIN, SIGTTOU, SIGTSTP,
 133       --  Keep these three signals unmasked so that background processes
 134       --  and IO behaves as normal "C" applications
 135
 136       SIGPROF,
 137       --  To avoid confusing the profiler
 138
 139       SIGKILL, SIGSTOP,
 140       --  These two signals actually cannot be masked;
 141       --  POSIX simply won't allow it.
 142
 143       SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG);
 144       --  These three signals are used by GNU/LinuxThreads starting from
 145       --  glibc 2.1 (future 2.2).
 146
 147    Reserved    : constant Signal_Set :=
 148    --  I am not sure why the following signal is reserved.
 149    --  I guess they are not supported by this version of GNU/kFreeBSD.
 150      (0 .. 0 => SIGVTALRM);
 151
 152    type sigset_t is private;
 153
 154    function sigaddset (set : access sigset_t; sig : Signal) return int;
 155    pragma Import (C, sigaddset, "sigaddset");
 156
 157    function sigdelset (set : access sigset_t; sig : Signal) return int;
 158    pragma Import (C, sigdelset, "sigdelset");
 159
 160    function sigfillset (set : access sigset_t) return int;
 161    pragma Import (C, sigfillset, "sigfillset");
 162
 163    function sigismember (set : access sigset_t; sig : Signal) return int;
 164    pragma Import (C, sigismember, "sigismember");
 165
 166    function sigemptyset (set : access sigset_t) return int;
 167    pragma Import (C, sigemptyset, "sigemptyset");
 168
 169    --  sigcontext is architecture dependent, so define it private
 170    type struct_sigcontext is private;
 171
 172    type struct_sigaction is record
 173       sa_handler : System.Address;
 174       sa_flags   : int;
 175       sa_mask    : sigset_t;
 176    end record;
 177    pragma Convention (C, struct_sigaction);
 178
 179    type struct_sigaction_ptr is access all struct_sigaction;
 180
 181    SIG_BLOCK   : constant := 1;
 182    SIG_UNBLOCK : constant := 2;
 183    SIG_SETMASK : constant := 3;
 184
 185    SIG_DFL : constant := 0;
 186    SIG_IGN : constant := 1;
 187
 188    SA_SIGINFO : constant := 16#0040#;
 189    SA_ONSTACK : constant := 16#0001#;
 190
 191    function sigaction
 192      (sig  : Signal;
 193       act  : struct_sigaction_ptr;
 194       oact : struct_sigaction_ptr) return int;
 195    pragma Import (C, sigaction, "sigaction");
 196
 197    ----------
 198    -- Time --
 199    ----------
 200
 201    type timespec is private;
 202
 203    function To_Duration (TS : timespec) return Duration;
 204    pragma Inline (To_Duration);
 205
 206    function To_Timespec (D : Duration) return timespec;
 207    pragma Inline (To_Timespec);
 208
 209    function sysconf (name : int) return long;
 210    pragma Import (C, sysconf);
 211
 212    SC_CLK_TCK          : constant := 2;
 213    SC_NPROCESSORS_ONLN : constant := 84;
 214
 215    -------------------------
 216    -- Priority Scheduling --
 217    -------------------------
 218
 219    SCHED_FIFO  : constant := 1;
 220    SCHED_OTHER : constant := 2;
 221    SCHED_RR    : constant := 3;
 222
 223    function To_Target_Priority
 224      (Prio : System.Any_Priority) return Interfaces.C.int;
 225    --  Maps System.Any_Priority to a POSIX priority.
 226
 227    -------------
 228    -- Process --
 229    -------------
 230
 231    type pid_t is private;
 232
 233    function kill (pid : pid_t; sig : Signal) return int;
 234    pragma Import (C, kill, "kill");
 235
 236    function getpid return pid_t;
 237    pragma Import (C, getpid, "getpid");
 238
 239    -------------
 240    -- Threads --
 241    -------------
 242
 243    type Thread_Body is access
 244      function (arg : System.Address) return System.Address;
 245    pragma Convention (C, Thread_Body);
 246
 247    function Thread_Body_Access is new
 248      Unchecked_Conversion (System.Address, Thread_Body);
 249
 250    type pthread_t is new unsigned_long;
 251    subtype Thread_Id        is pthread_t;
 252
 253    function To_pthread_t is new Unchecked_Conversion
 254      (unsigned_long, pthread_t);
 255
 256    type pthread_mutex_t     is limited private;
 257    type pthread_cond_t      is limited private;
 258    type pthread_attr_t      is limited private;
 259    type pthread_mutexattr_t is limited private;
 260    type pthread_condattr_t  is limited private;
 261    type pthread_key_t       is private;
 262
 263    PTHREAD_CREATE_DETACHED : constant := 1;
 264
 265    -----------
 266    -- Stack --
 267    -----------
 268
 269    type stack_t is record
 270       ss_sp    : System.Address;
 271       ss_size  : size_t;
 272       ss_flags : int;
 273    end record;
 274    pragma Convention (C, stack_t);
 275
 276    function sigaltstack
 277      (ss  : not null access stack_t;
 278       oss : access stack_t) return int;
 279    pragma Import (C, sigaltstack, "sigaltstack");
 280
 281    Alternate_Stack : aliased System.Address;
 282    --  This is a dummy definition, never used (Alternate_Stack_Size is null)
 283
 284    Alternate_Stack_Size : constant := 0;
 285    --  No alternate signal stack is used on this platform
 286
 287    function Get_Stack_Base (thread : pthread_t) return Address;
 288    pragma Inline (Get_Stack_Base);
 289    --  This is a dummy procedure to share some GNULLI files
 290
 291    ---------------------------------------
 292    -- Nonstandard Thread Initialization --
 293    ---------------------------------------
 294
 295    procedure pthread_init;
 296    pragma Inline (pthread_init);
 297    --  This is a dummy procedure to share some GNULLI files
 298
 299    -------------------------
 300    -- POSIX.1c  Section 3 --
 301    -------------------------
 302
 303    function sigwait (set : access sigset_t; sig : access Signal) return int;
 304    pragma Import (C, sigwait, "sigwait");
 305
 306    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 307    pragma Import (C, pthread_kill, "pthread_kill");
 308
 309    function pthread_sigmask
 310      (how  : int;
 311       set  : access sigset_t;
 312       oset : access sigset_t) return int;
 313    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 314
 315    --------------------------
 316    -- POSIX.1c  Section 11 --
 317    --------------------------
 318
 319    function pthread_mutexattr_init
 320      (attr : access pthread_mutexattr_t) return int;
 321    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 322
 323    function pthread_mutexattr_destroy
 324      (attr : access pthread_mutexattr_t) return int;
 325    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 326
 327    function pthread_mutex_init
 328      (mutex : access pthread_mutex_t;
 329       attr  : access pthread_mutexattr_t) return int;
 330    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 331
 332    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 333    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 334
 335    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 336    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 337
 338    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 339    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 340
 341    function pthread_condattr_init
 342      (attr : access pthread_condattr_t) return int;
 343    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 344
 345    function pthread_condattr_destroy
 346      (attr : access pthread_condattr_t) return int;
 347    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 348
 349    function pthread_cond_init
 350      (cond : access pthread_cond_t;
 351       attr : access pthread_condattr_t) return int;
 352    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 353
 354    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 355    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 356
 357    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 358    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 359
 360    function pthread_cond_wait
 361      (cond  : access pthread_cond_t;
 362       mutex : access pthread_mutex_t) return int;
 363    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 364
 365    function pthread_cond_timedwait
 366      (cond    : access pthread_cond_t;
 367       mutex   : access pthread_mutex_t;
 368       abstime : access timespec) return int;
 369    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 370
 371    Relative_Timed_Wait : constant Boolean := False;
 372    --  pthread_cond_timedwait requires an absolute delay time
 373
 374    --------------------------
 375    -- POSIX.1c  Section 13 --
 376    --------------------------
 377
 378    type struct_sched_param is record
 379       sched_priority : int;  --  scheduling priority
 380    end record;
 381    pragma Convention (C, struct_sched_param);
 382
 383    function pthread_setschedparam
 384      (thread : pthread_t;
 385       policy : int;
 386       param  : access struct_sched_param) return int;
 387    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 388
 389    function pthread_attr_setschedpolicy
 390      (attr   : access pthread_attr_t;
 391       policy : int) return int;
 392    pragma Import
 393      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 394
 395    function sched_yield return int;
 396    pragma Import (C, sched_yield, "sched_yield");
 397
 398    ---------------------------
 399    -- P1003.1c - Section 16 --
 400    ---------------------------
 401
 402    function pthread_attr_init
 403      (attributes : access pthread_attr_t) return int;
 404    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 405
 406    function pthread_attr_destroy
 407      (attributes : access pthread_attr_t) return int;
 408    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 409
 410    function pthread_attr_setdetachstate
 411      (attr        : access pthread_attr_t;
 412       detachstate : int) return int;
 413    pragma Import
 414      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 415
 416    function pthread_attr_setstacksize
 417      (attr      : access pthread_attr_t;
 418       stacksize : size_t) return int;
 419    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 420
 421    function pthread_create
 422      (thread        : access pthread_t;
 423       attributes    : access pthread_attr_t;
 424       start_routine : Thread_Body;
 425       arg           : System.Address) return int;
 426    pragma Import (C, pthread_create, "pthread_create");
 427
 428    procedure pthread_exit (status : System.Address);
 429    pragma Import (C, pthread_exit, "pthread_exit");
 430
 431    function pthread_self return pthread_t;
 432    pragma Import (C, pthread_self, "pthread_self");
 433
 434    --------------------------
 435    -- POSIX.1c  Section 17 --
 436    --------------------------
 437
 438    function pthread_setspecific
 439      (key   : pthread_key_t;
 440       value : System.Address) return int;
 441    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 442
 443    function pthread_getspecific (key : pthread_key_t) return System.Address;
 444    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 445
 446    type destructor_pointer is access procedure (arg : System.Address);
 447    pragma Convention (C, destructor_pointer);
 448
 449    function pthread_key_create
 450      (key        : access pthread_key_t;
 451       destructor : destructor_pointer) return int;
 452    pragma Import (C, pthread_key_create, "pthread_key_create");
 453
 454    CPU_SETSIZE : constant := 1_024;
 455
 456    type bit_field is array (1 .. CPU_SETSIZE) of Boolean;
 457    for bit_field'Size use CPU_SETSIZE;
 458    pragma Pack (bit_field);
 459    pragma Convention (C, bit_field);
 460
 461    type cpu_set_t is record
 462       bits : bit_field;
 463    end record;
 464    pragma Convention (C, cpu_set_t);
 465
 466    function pthread_setaffinity_np
 467      (thread     : pthread_t;
 468       cpusetsize : size_t;
 469       cpuset     : access cpu_set_t) return int;
 470    pragma Import (C, pthread_setaffinity_np, "__gnat_pthread_setaffinity_np");
 471
 472 private
 473
 474    type sigset_t is array (1 .. 4) of unsigned;
 475
 476    --  In FreeBSD the component sa_handler turns out to
 477    --  be one a union type, and the selector is a macro:
 478    --  #define sa_handler __sigaction_u._handler
 479    --  #define sa_sigaction __sigaction_u._sigaction
 480
 481    --  Should we add a signal_context type here ?
 482    --  How could it be done independent of the CPU architecture ?
 483    --  sigcontext type is opaque, so it is architecturally neutral.
 484    --  It is always passed as an access type, so define it as an empty record
 485    --  since the contents are not used anywhere.
 486    type struct_sigcontext is null record;
 487    pragma Convention (C, struct_sigcontext);
 488
 489    type pid_t is new int;
 490
 491    type time_t is new long;
 492
 493    type timespec is record
 494       tv_sec  : time_t;
 495       tv_nsec : long;
 496    end record;
 497    pragma Convention (C, timespec);
 498
 499    type pthread_attr_t is record
 500       detachstate   : int;
 501       schedpolicy   : int;
 502       schedparam    : struct_sched_param;
 503       inheritsched  : int;
 504       scope         : int;
 505       guardsize     : size_t;
 506       stackaddr_set : int;
 507       stackaddr     : System.Address;
 508       stacksize     : size_t;
 509    end record;
 510    pragma Convention (C, pthread_attr_t);
 511
 512    type pthread_condattr_t is record
 513       dummy : int;
 514    end record;
 515    pragma Convention (C, pthread_condattr_t);
 516
 517    type pthread_mutexattr_t is record
 518       mutexkind : int;
 519    end record;
 520    pragma Convention (C, pthread_mutexattr_t);
 521
 522    type struct_pthread_fast_lock is record
 523       status   : long;
 524       spinlock : int;
 525    end record;
 526    pragma Convention (C, struct_pthread_fast_lock);
 527
 528    type pthread_mutex_t is record
 529       m_reserved : int;
 530       m_count    : int;
 531       m_owner    : System.Address;
 532       m_kind     : int;
 533       m_lock     : struct_pthread_fast_lock;
 534    end record;
 535    pragma Convention (C, pthread_mutex_t);
 536
 537    type pthread_cond_t is array (0 .. 47) of unsigned_char;
 538    pragma Convention (C, pthread_cond_t);
 539
 540    type pthread_key_t is new unsigned;
 541
 542 end System.OS_Interface;