gcc/ada/s-osinte-aix.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT 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) 1995-2006, 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 a AIX (Native THREADS) 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 ("-lpthreads");
  50    pragma Linker_Options ("-lc_r");
  51
  52    subtype int            is Interfaces.C.int;
  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 := 11;
  70    EINTR     : constant := 4;
  71    EINVAL    : constant := 22;
  72    ENOMEM    : constant := 12;
  73    ETIMEDOUT : constant := 78;
  74
  75    -------------
  76    -- Signals --
  77    -------------
  78
  79    Max_Interrupt : constant := 63;
  80    type Signal is new int range 0 .. Max_Interrupt;
  81    for Signal'Size use int'Size;
  82
  83    SIGHUP      : constant := 1; --  hangup
  84    SIGINT      : constant := 2; --  interrupt (rubout)
  85    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  86    SIGILL      : constant := 4; --  illegal instruction (not reset)
  87    SIGTRAP     : constant := 5; --  trace trap (not reset)
  88    SIGIOT      : constant := 6; --  IOT instruction
  89    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  90    SIGEMT      : constant := 7; --  EMT instruction
  91    SIGFPE      : constant := 8; --  floating point exception
  92    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  93    SIGBUS      : constant := 10; --  bus error
  94    SIGSEGV     : constant := 11; --  segmentation violation
  95    SIGSYS      : constant := 12; --  bad argument to system call
  96    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  97    SIGALRM     : constant := 14; --  alarm clock
  98    SIGTERM     : constant := 15; --  software termination signal from kill
  99    SIGUSR1     : constant := 30; --  user defined signal 1
 100    SIGUSR2     : constant := 31; --  user defined signal 2
 101    SIGCLD      : constant := 20; --  alias for SIGCHLD
 102    SIGCHLD     : constant := 20; --  child status change
 103    SIGPWR      : constant := 29; --  power-fail restart
 104    SIGWINCH    : constant := 28; --  window size change
 105    SIGURG      : constant := 16; --  urgent condition on IO channel
 106    SIGPOLL     : constant := 23; --  pollable event occurred
 107    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 108    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 109    SIGTSTP     : constant := 18; --  user stop requested from tty
 110    SIGCONT     : constant := 19; --  stopped process has been continued
 111    SIGTTIN     : constant := 21; --  background tty read attempted
 112    SIGTTOU     : constant := 22; --  background tty write attempted
 113    SIGVTALRM   : constant := 34; --  virtual timer expired
 114    SIGPROF     : constant := 32; --  profiling timer expired
 115    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 116    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 117    SIGWAITING  : constant := 39; --  m:n scheduling
 118
 119    --  The following signals are AIX specific
 120
 121    SIGMSG      : constant := 27; -- input data is in the ring buffer
 122    SIGDANGER   : constant := 33; -- system crash imminent
 123    SIGMIGRATE  : constant := 35; -- migrate process
 124    SIGPRE      : constant := 36; -- programming exception
 125    SIGVIRT     : constant := 37; -- AIX virtual time alarm
 126    SIGALRM1    : constant := 38; -- m:n condition variables
 127    SIGCPUFAIL  : constant := 59; -- Predictive De-configuration of Processors
 128    SIGKAP      : constant := 60; -- keep alive poll from native keyboard
 129    SIGGRANT    : constant := SIGKAP; -- monitor mode granted
 130    SIGRETRACT  : constant := 61; -- monitor mode should be relinguished
 131    SIGSOUND    : constant := 62; -- sound control has completed
 132    SIGSAK      : constant := 63; -- secure attention key
 133
 134    SIGADAABORT : constant := SIGTERM;
 135    --  Note: on other targets, we usually use SIGABRT, but on AiX, it
 136    --  appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
 137
 138    type Signal_Set is array (Natural range <>) of Signal;
 139
 140    Unmasked    : constant Signal_Set :=
 141      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 142    Reserved    : constant Signal_Set :=
 143      (SIGABRT, SIGKILL, SIGSTOP, SIGALRM1, SIGWAITING, SIGCPUFAIL);
 144
 145    type sigset_t is private;
 146
 147    function sigaddset (set : access sigset_t; sig : Signal) return int;
 148    pragma Import (C, sigaddset, "sigaddset");
 149
 150    function sigdelset (set : access sigset_t; sig : Signal) return int;
 151    pragma Import (C, sigdelset, "sigdelset");
 152
 153    function sigfillset (set : access sigset_t) return int;
 154    pragma Import (C, sigfillset, "sigfillset");
 155
 156    function sigismember (set : access sigset_t; sig : Signal) return int;
 157    pragma Import (C, sigismember, "sigismember");
 158
 159    function sigemptyset (set : access sigset_t) return int;
 160    pragma Import (C, sigemptyset, "sigemptyset");
 161
 162    type struct_sigaction is record
 163       sa_handler : System.Address;
 164       sa_mask    : sigset_t;
 165       sa_flags   : int;
 166    end record;
 167    pragma Convention (C, struct_sigaction);
 168    type struct_sigaction_ptr is access all struct_sigaction;
 169
 170    SA_SIGINFO  : constant := 16#0100#;
 171
 172    SIG_BLOCK   : constant := 0;
 173    SIG_UNBLOCK : constant := 1;
 174    SIG_SETMASK : constant := 2;
 175
 176    SIG_DFL : constant := 0;
 177    SIG_IGN : constant := 1;
 178
 179    function sigaction
 180      (sig  : Signal;
 181       act  : struct_sigaction_ptr;
 182       oact : struct_sigaction_ptr) return int;
 183    pragma Import (C, sigaction, "sigaction");
 184
 185    ----------
 186    -- Time --
 187    ----------
 188
 189    Time_Slice_Supported : constant Boolean := False;
 190    --  Indicates wether time slicing is supported
 191
 192    type timespec is private;
 193
 194    type clockid_t is private;
 195
 196    CLOCK_REALTIME : constant clockid_t;
 197
 198    function clock_gettime
 199      (clock_id : clockid_t;
 200       tp       : access timespec) return int;
 201    --  AiX threads don't have clock_gettime
 202    --  We instead use gettimeofday()
 203
 204    function To_Duration (TS : timespec) return Duration;
 205    pragma Inline (To_Duration);
 206
 207    function To_Timespec (D : Duration) return timespec;
 208    pragma Inline (To_Timespec);
 209
 210    type struct_timezone is record
 211       tz_minuteswest : int;
 212       tz_dsttime     : int;
 213    end record;
 214    pragma Convention (C, struct_timezone);
 215    type struct_timezone_ptr is access all struct_timezone;
 216
 217    type struct_timeval is private;
 218    --  This is needed on systems that do not have clock_gettime()
 219    --  but do have gettimeofday().
 220
 221    function To_Duration (TV : struct_timeval) return Duration;
 222    pragma Inline (To_Duration);
 223
 224    function To_Timeval (D : Duration) return struct_timeval;
 225    pragma Inline (To_Timeval);
 226
 227    -------------------------
 228    -- Priority Scheduling --
 229    -------------------------
 230
 231    SCHED_FIFO  : constant := 1;
 232    SCHED_RR    : constant := 2;
 233    SCHED_OTHER : constant := 0;
 234
 235    function To_Target_Priority
 236      (Prio : System.Any_Priority) return Interfaces.C.int;
 237    --  Maps System.Any_Priority to a POSIX priority.
 238
 239    -------------
 240    -- Process --
 241    -------------
 242
 243    type pid_t is private;
 244
 245    function kill (pid : pid_t; sig : Signal) return int;
 246    pragma Import (C, kill, "kill");
 247
 248    function getpid return pid_t;
 249    pragma Import (C, getpid, "getpid");
 250
 251    ---------
 252    -- LWP --
 253    ---------
 254
 255    function lwp_self return System.Address;
 256    pragma Import (C, lwp_self, "thread_self");
 257
 258    -------------
 259    -- Threads --
 260    -------------
 261
 262    type Thread_Body is access
 263      function (arg : System.Address) return System.Address;
 264
 265    function Thread_Body_Access is new
 266      Unchecked_Conversion (System.Address, Thread_Body);
 267
 268    type pthread_t           is private;
 269    subtype Thread_Id        is pthread_t;
 270
 271    type pthread_mutex_t     is limited private;
 272    type pthread_cond_t      is limited private;
 273    type pthread_attr_t      is limited private;
 274    type pthread_mutexattr_t is limited private;
 275    type pthread_condattr_t  is limited private;
 276    type pthread_key_t       is private;
 277
 278    PTHREAD_CREATE_DETACHED : constant := 1;
 279
 280    -----------
 281    -- Stack --
 282    -----------
 283
 284    Stack_Base_Available : constant Boolean := False;
 285    --  Indicates wether the stack base is available on this target.
 286
 287    function Get_Stack_Base (thread : pthread_t) return Address;
 288    pragma Inline (Get_Stack_Base);
 289    --  returns the stack base of the specified thread.
 290    --  Only call this function when Stack_Base_Available is True.
 291
 292    function Get_Page_Size return size_t;
 293    function Get_Page_Size return Address;
 294    pragma Import (C, Get_Page_Size, "getpagesize");
 295    --  returns the size of a page, or 0 if this is not relevant on this
 296    --  target
 297
 298    PROT_NONE  : constant := 0;
 299    PROT_READ  : constant := 1;
 300    PROT_WRITE : constant := 2;
 301    PROT_EXEC  : constant := 4;
 302    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 303
 304    PROT_ON    : constant := PROT_READ;
 305    PROT_OFF   : constant := PROT_ALL;
 306
 307    function mprotect (addr : Address; len : size_t; prot : int) return int;
 308    pragma Import (C, mprotect);
 309
 310    ---------------------------------------
 311    -- Nonstandard Thread Initialization --
 312    ---------------------------------------
 313
 314    --  Though not documented, pthread_init *must* be called before any other
 315    --  pthread call
 316
 317    procedure pthread_init;
 318    pragma Import (C, pthread_init, "pthread_init");
 319
 320    -------------------------
 321    -- POSIX.1c  Section 3 --
 322    -------------------------
 323
 324    function sigwait
 325      (set : access sigset_t;
 326       sig : access Signal) return int;
 327    pragma Import (C, sigwait, "sigwait");
 328
 329    function pthread_kill
 330      (thread : pthread_t;
 331       sig    : Signal) return int;
 332    pragma Import (C, pthread_kill, "pthread_kill");
 333
 334    function pthread_sigmask
 335      (how  : int;
 336       set  : access sigset_t;
 337       oset : access sigset_t) return int;
 338    pragma Import (C, pthread_sigmask, "sigthreadmask");
 339
 340    --------------------------
 341    -- POSIX.1c  Section 11 --
 342    --------------------------
 343
 344    function pthread_mutexattr_init
 345      (attr : access pthread_mutexattr_t) return int;
 346    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 347
 348    function pthread_mutexattr_destroy
 349      (attr : access pthread_mutexattr_t) return int;
 350    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 351
 352    function pthread_mutex_init
 353      (mutex : access pthread_mutex_t;
 354       attr  : access pthread_mutexattr_t) return int;
 355    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 356
 357    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 358    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 359
 360    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 361    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 362
 363    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 364    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 365
 366    function pthread_condattr_init
 367      (attr : access pthread_condattr_t) return int;
 368    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 369
 370    function pthread_condattr_destroy
 371      (attr : access pthread_condattr_t) return int;
 372    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 373
 374    function pthread_cond_init
 375      (cond : access pthread_cond_t;
 376       attr : access pthread_condattr_t) return int;
 377    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 378
 379    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 380    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 381
 382    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 383    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 384
 385    function pthread_cond_wait
 386      (cond  : access pthread_cond_t;
 387       mutex : access pthread_mutex_t) return int;
 388    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 389
 390    function pthread_cond_timedwait
 391      (cond    : access pthread_cond_t;
 392       mutex   : access pthread_mutex_t;
 393       abstime : access timespec) return int;
 394    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 395
 396    Relative_Timed_Wait : constant Boolean := False;
 397    --  pthread_cond_timedwait requires an absolute delay time
 398
 399    --------------------------
 400    -- POSIX.1c  Section 13 --
 401    --------------------------
 402
 403    PTHREAD_PRIO_PROTECT : constant := 2;
 404
 405    function PTHREAD_PRIO_INHERIT return int;
 406    --  Return value of C macro PTHREAD_PRIO_INHERIT. This function is needed
 407    --  since the value is different between AIX versions.
 408
 409    function pthread_mutexattr_setprotocol
 410      (attr     : access pthread_mutexattr_t;
 411       protocol : int) return int;
 412    pragma Import (C, pthread_mutexattr_setprotocol);
 413
 414    function pthread_mutexattr_setprioceiling
 415      (attr        : access pthread_mutexattr_t;
 416       prioceiling : int) return int;
 417    pragma Import (C, pthread_mutexattr_setprioceiling);
 418
 419    type Array_5_Int is array (0 .. 5) of int;
 420    type struct_sched_param is record
 421       sched_priority : int;
 422       sched_policy   : int;
 423       sched_reserved : Array_5_Int;
 424    end record;
 425
 426    function pthread_setschedparam
 427      (thread : pthread_t;
 428       policy : int;
 429       param  : access struct_sched_param) return int;
 430    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 431
 432    function pthread_attr_setscope
 433      (attr            : access pthread_attr_t;
 434       contentionscope : int) return int;
 435    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 436
 437    function pthread_attr_setinheritsched
 438      (attr            : access pthread_attr_t;
 439       inheritsched : int) return int;
 440    pragma Import (C, pthread_attr_setinheritsched);
 441
 442    function pthread_attr_setschedpolicy
 443      (attr   : access pthread_attr_t;
 444       policy : int) return int;
 445    pragma Import (C, pthread_attr_setschedpolicy);
 446
 447    function pthread_attr_setschedparam
 448      (attr        : access pthread_attr_t;
 449       sched_param : int) return int;
 450    pragma Import (C, pthread_attr_setschedparam);
 451
 452    function sched_yield return int;
 453    --  AiX have a nonstandard sched_yield.
 454
 455    --------------------------
 456    -- P1003.1c  Section 16 --
 457    --------------------------
 458
 459    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 460    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 461
 462    function pthread_attr_destroy
 463      (attributes : access pthread_attr_t) return int;
 464    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 465
 466    function pthread_attr_setdetachstate
 467      (attr        : access pthread_attr_t;
 468       detachstate : int) return int;
 469    pragma Import (C, pthread_attr_setdetachstate);
 470
 471    function pthread_attr_setstacksize
 472      (attr      : access pthread_attr_t;
 473       stacksize : size_t) return int;
 474    pragma Import (C, pthread_attr_setstacksize);
 475
 476    function pthread_create
 477      (thread        : access pthread_t;
 478       attributes    : access pthread_attr_t;
 479       start_routine : Thread_Body;
 480       arg           : System.Address)
 481      return int;
 482    pragma Import (C, pthread_create, "pthread_create");
 483
 484    procedure pthread_exit (status : System.Address);
 485    pragma Import (C, pthread_exit, "pthread_exit");
 486
 487    function pthread_self return pthread_t;
 488    pragma Import (C, pthread_self, "pthread_self");
 489
 490    --------------------------
 491    -- POSIX.1c  Section 17 --
 492    --------------------------
 493
 494    function pthread_setspecific
 495      (key   : pthread_key_t;
 496       value : System.Address) return int;
 497    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 498
 499    function pthread_getspecific (key : pthread_key_t) return System.Address;
 500    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 501
 502    type destructor_pointer is access
 503       procedure (arg : System.Address);
 504
 505    function pthread_key_create
 506      (key        : access pthread_key_t;
 507       destructor : destructor_pointer) return int;
 508    pragma Import (C, pthread_key_create, "pthread_key_create");
 509
 510 private
 511
 512    type sigset_t is record
 513       losigs : unsigned_long;
 514       hisigs : unsigned_long;
 515    end record;
 516    pragma Convention (C_Pass_By_Copy, sigset_t);
 517
 518    type pid_t is new int;
 519
 520    type time_t is new long;
 521
 522    type timespec is record
 523       tv_sec  : time_t;
 524       tv_nsec : long;
 525    end record;
 526    pragma Convention (C, timespec);
 527
 528    type clockid_t is new int;
 529    CLOCK_REALTIME : constant clockid_t := 0;
 530
 531    type struct_timeval is record
 532       tv_sec  : long;
 533       tv_usec : long;
 534    end record;
 535    pragma Convention (C, struct_timeval);
 536
 537    type pthread_attr_t is new System.Address;
 538    pragma Convention (C, pthread_attr_t);
 539    --  typedef struct __pt_attr        *pthread_attr_t;
 540
 541    type pthread_condattr_t is new System.Address;
 542    pragma Convention (C, pthread_condattr_t);
 543    --  typedef struct __pt_attr        *pthread_condattr_t;
 544
 545    type pthread_mutexattr_t is new System.Address;
 546    pragma Convention (C, pthread_mutexattr_t);
 547    --  typedef struct __pt_attr        *pthread_mutexattr_t;
 548
 549    type pthread_t is new System.Address;
 550    pragma Convention (C, pthread_t);
 551    --  typedef void    *pthread_t;
 552
 553    type ptq_queue;
 554    type ptq_queue_ptr is access all ptq_queue;
 555
 556    type ptq_queue is record
 557       ptq_next : ptq_queue_ptr;
 558       ptq_prev : ptq_queue_ptr;
 559    end record;
 560
 561    type Array_3_Int is array (0 .. 3) of int;
 562    type pthread_mutex_t is record
 563         link        : ptq_queue;
 564         ptmtx_lock  : int;
 565         ptmtx_flags : long;
 566         protocol    : int;
 567         prioceiling : int;
 568         ptmtx_owner : pthread_t;
 569         mtx_id      : int;
 570         attr        : pthread_attr_t;
 571         mtx_kind    : int;
 572         lock_cpt    : int;
 573         reserved    : Array_3_Int;
 574    end record;
 575    pragma Convention (C, pthread_mutex_t);
 576    type pthread_mutex_t_ptr is access pthread_mutex_t;
 577
 578    type pthread_cond_t is record
 579       link         : ptq_queue;
 580       ptcv_lock    : int;
 581       ptcv_flags   : long;
 582       ptcv_waiters : ptq_queue;
 583       cv_id        : int;
 584       attr         : pthread_attr_t;
 585       mutex        : pthread_mutex_t_ptr;
 586       cptwait      : int;
 587       reserved     : int;
 588    end record;
 589    pragma Convention (C, pthread_cond_t);
 590
 591    type pthread_key_t is new unsigned;
 592
 593 end System.OS_Interface;