gcc/ada/s-osinte-mingw.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) 1995-2011, 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 a NT (native) version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services
  36 --  that are needed by the tasking run-time (libgnarl). For non tasking
  37 --  oriented services consider declaring them into system-win32.
  38
  39 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  40 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  41
  42 with Ada.Unchecked_Conversion;
  43
  44 with Interfaces.C;
  45 with Interfaces.C.Strings;
  46 with System.Win32;
  47
  48 package System.OS_Interface is
  49    pragma Preelaborate;
  50
  51    pragma Linker_Options ("-mthreads");
  52
  53    subtype int  is Interfaces.C.int;
  54    subtype long is Interfaces.C.long;
  55
  56    -------------------
  57    -- General Types --
  58    -------------------
  59
  60    subtype PSZ   is Interfaces.C.Strings.chars_ptr;
  61
  62    Null_Void : constant Win32.PVOID := System.Null_Address;
  63
  64    -------------------------
  65    -- Handles for objects --
  66    -------------------------
  67
  68    subtype Thread_Id is Win32.HANDLE;
  69
  70    -----------
  71    -- Errno --
  72    -----------
  73
  74    NO_ERROR : constant := 0;
  75    FUNC_ERR : constant := -1;
  76
  77    -------------
  78    -- Signals --
  79    -------------
  80
  81    Max_Interrupt : constant := 31;
  82    type Signal is new int range 0 .. Max_Interrupt;
  83    for Signal'Size use int'Size;
  84
  85    SIGINT     : constant := 2; --  interrupt (Ctrl-C)
  86    SIGILL     : constant := 4; --  illegal instruction (not reset)
  87    SIGFPE     : constant := 8; --  floating point exception
  88    SIGSEGV    : constant := 11; -- segmentation violation
  89    SIGTERM    : constant := 15; -- software termination signal from kill
  90    SIGBREAK   : constant := 21; -- break (Ctrl-Break)
  91    SIGABRT    : constant := 22; -- used by abort, replace SIGIOT in the future
  92
  93    type sigset_t is private;
  94
  95    type isr_address is access procedure (sig : int);
  96    pragma Convention (C, isr_address);
  97
  98    function intr_attach (sig : int; handler : isr_address) return long;
  99    pragma Import (C, intr_attach, "signal");
 100
 101    Intr_Attach_Reset : constant Boolean := True;
 102    --  True if intr_attach is reset after an interrupt handler is called
 103
 104    procedure kill (sig : Signal);
 105    pragma Import (C, kill, "raise");
 106
 107    -------------
 108    -- Threads --
 109    -------------
 110
 111    type Thread_Body is access
 112      function (arg : System.Address) return System.Address;
 113    pragma Convention (C, Thread_Body);
 114
 115    function Thread_Body_Access is new
 116      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 117
 118    procedure SwitchToThread;
 119    pragma Import (Stdcall, SwitchToThread, "SwitchToThread");
 120
 121    function GetThreadTimes
 122      (hThread        : Win32.HANDLE;
 123       lpCreationTime : access Long_Long_Integer;
 124       lpExitTime     : access Long_Long_Integer;
 125       lpKernelTime   : access Long_Long_Integer;
 126       lpUserTime     : access Long_Long_Integer) return Win32.BOOL;
 127    pragma Import (Stdcall, GetThreadTimes, "GetThreadTimes");
 128
 129    -----------------------
 130    -- Critical sections --
 131    -----------------------
 132
 133    type CRITICAL_SECTION is private;
 134
 135    -------------------------------------------------------------
 136    -- Thread Creation, Activation, Suspension And Termination --
 137    -------------------------------------------------------------
 138
 139    type PTHREAD_START_ROUTINE is access function
 140      (pThreadParameter : Win32.PVOID) return Win32.DWORD;
 141    pragma Convention (Stdcall, PTHREAD_START_ROUTINE);
 142
 143    function To_PTHREAD_START_ROUTINE is new
 144      Ada.Unchecked_Conversion (System.Address, PTHREAD_START_ROUTINE);
 145
 146    function CreateThread
 147      (pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
 148       dwStackSize       : Win32.DWORD;
 149       pStartAddress     : PTHREAD_START_ROUTINE;
 150       pParameter        : Win32.PVOID;
 151       dwCreationFlags   : Win32.DWORD;
 152       pThreadId         : access Win32.DWORD) return Win32.HANDLE;
 153    pragma Import (Stdcall, CreateThread, "CreateThread");
 154
 155    function BeginThreadEx
 156      (pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
 157       dwStackSize       : Win32.DWORD;
 158       pStartAddress     : PTHREAD_START_ROUTINE;
 159       pParameter        : Win32.PVOID;
 160       dwCreationFlags   : Win32.DWORD;
 161       pThreadId         : not null access Win32.DWORD) return Win32.HANDLE;
 162    pragma Import (C, BeginThreadEx, "_beginthreadex");
 163
 164    Debug_Process                     : constant := 16#00000001#;
 165    Debug_Only_This_Process           : constant := 16#00000002#;
 166    Create_Suspended                  : constant := 16#00000004#;
 167    Detached_Process                  : constant := 16#00000008#;
 168    Create_New_Console                : constant := 16#00000010#;
 169
 170    Create_New_Process_Group          : constant := 16#00000200#;
 171
 172    Create_No_window                  : constant := 16#08000000#;
 173
 174    Profile_User                      : constant := 16#10000000#;
 175    Profile_Kernel                    : constant := 16#20000000#;
 176    Profile_Server                    : constant := 16#40000000#;
 177
 178    Stack_Size_Param_Is_A_Reservation : constant := 16#00010000#;
 179
 180    function GetExitCodeThread
 181      (hThread   : Win32.HANDLE;
 182       pExitCode : not null access Win32.DWORD) return Win32.BOOL;
 183    pragma Import (Stdcall, GetExitCodeThread, "GetExitCodeThread");
 184
 185    function ResumeThread (hThread : Win32.HANDLE) return Win32.DWORD;
 186    pragma Import (Stdcall, ResumeThread, "ResumeThread");
 187
 188    function SuspendThread (hThread : Win32.HANDLE) return Win32.DWORD;
 189    pragma Import (Stdcall, SuspendThread, "SuspendThread");
 190
 191    procedure ExitThread (dwExitCode : Win32.DWORD);
 192    pragma Import (Stdcall, ExitThread, "ExitThread");
 193
 194    procedure EndThreadEx (dwExitCode : Win32.DWORD);
 195    pragma Import (C, EndThreadEx, "_endthreadex");
 196
 197    function TerminateThread
 198      (hThread    : Win32.HANDLE;
 199       dwExitCode : Win32.DWORD) return Win32.BOOL;
 200    pragma Import (Stdcall, TerminateThread, "TerminateThread");
 201
 202    function GetCurrentThread return Win32.HANDLE;
 203    pragma Import (Stdcall, GetCurrentThread, "GetCurrentThread");
 204
 205    function GetCurrentProcess return Win32.HANDLE;
 206    pragma Import (Stdcall, GetCurrentProcess, "GetCurrentProcess");
 207
 208    function GetCurrentThreadId return Win32.DWORD;
 209    pragma Import (Stdcall, GetCurrentThreadId, "GetCurrentThreadId");
 210
 211    function TlsAlloc return Win32.DWORD;
 212    pragma Import (Stdcall, TlsAlloc, "TlsAlloc");
 213
 214    function TlsGetValue (dwTlsIndex : Win32.DWORD) return Win32.PVOID;
 215    pragma Import (Stdcall, TlsGetValue, "TlsGetValue");
 216
 217    function TlsSetValue
 218      (dwTlsIndex : Win32.DWORD; pTlsValue : Win32.PVOID) return Win32.BOOL;
 219    pragma Import (Stdcall, TlsSetValue, "TlsSetValue");
 220
 221    function TlsFree (dwTlsIndex : Win32.DWORD) return Win32.BOOL;
 222    pragma Import (Stdcall, TlsFree, "TlsFree");
 223
 224    TLS_Nothing : constant := Win32.DWORD'Last;
 225
 226    procedure ExitProcess (uExitCode : Interfaces.C.unsigned);
 227    pragma Import (Stdcall, ExitProcess, "ExitProcess");
 228
 229    function WaitForSingleObject
 230      (hHandle        : Win32.HANDLE;
 231       dwMilliseconds : Win32.DWORD) return Win32.DWORD;
 232    pragma Import (Stdcall, WaitForSingleObject, "WaitForSingleObject");
 233
 234    function WaitForSingleObjectEx
 235      (hHandle        : Win32.HANDLE;
 236       dwMilliseconds : Win32.DWORD;
 237       fAlertable     : Win32.BOOL) return Win32.DWORD;
 238    pragma Import (Stdcall, WaitForSingleObjectEx, "WaitForSingleObjectEx");
 239
 240    Wait_Infinite : constant := Win32.DWORD'Last;
 241    WAIT_TIMEOUT  : constant := 16#0000_0102#;
 242    WAIT_FAILED   : constant := 16#FFFF_FFFF#;
 243
 244    ------------------------------------
 245    -- Semaphores, Events and Mutexes --
 246    ------------------------------------
 247
 248    function CreateSemaphore
 249      (pSemaphoreAttributes : access Win32.SECURITY_ATTRIBUTES;
 250       lInitialCount        : Interfaces.C.long;
 251       lMaximumCount        : Interfaces.C.long;
 252       pName                : PSZ) return Win32.HANDLE;
 253    pragma Import (Stdcall, CreateSemaphore, "CreateSemaphoreA");
 254
 255    function OpenSemaphore
 256      (dwDesiredAccess : Win32.DWORD;
 257       bInheritHandle  : Win32.BOOL;
 258       pName           : PSZ) return Win32.HANDLE;
 259    pragma Import (Stdcall, OpenSemaphore, "OpenSemaphoreA");
 260
 261    function ReleaseSemaphore
 262      (hSemaphore     : Win32.HANDLE;
 263       lReleaseCount  : Interfaces.C.long;
 264       pPreviousCount : access Win32.LONG) return Win32.BOOL;
 265    pragma Import (Stdcall, ReleaseSemaphore, "ReleaseSemaphore");
 266
 267    function CreateEvent
 268      (pEventAttributes : access Win32.SECURITY_ATTRIBUTES;
 269       bManualReset     : Win32.BOOL;
 270       bInitialState    : Win32.BOOL;
 271       pName            : PSZ) return Win32.HANDLE;
 272    pragma Import (Stdcall, CreateEvent, "CreateEventA");
 273
 274    function OpenEvent
 275      (dwDesiredAccess : Win32.DWORD;
 276       bInheritHandle  : Win32.BOOL;
 277       pName           : PSZ) return Win32.HANDLE;
 278    pragma Import (Stdcall, OpenEvent, "OpenEventA");
 279
 280    function SetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
 281    pragma Import (Stdcall, SetEvent, "SetEvent");
 282
 283    function ResetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
 284    pragma Import (Stdcall, ResetEvent, "ResetEvent");
 285
 286    function PulseEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
 287    pragma Import (Stdcall, PulseEvent, "PulseEvent");
 288
 289    function CreateMutex
 290      (pMutexAttributes : access Win32.SECURITY_ATTRIBUTES;
 291       bInitialOwner    : Win32.BOOL;
 292       pName            : PSZ) return Win32.HANDLE;
 293    pragma Import (Stdcall, CreateMutex, "CreateMutexA");
 294
 295    function OpenMutex
 296      (dwDesiredAccess : Win32.DWORD;
 297       bInheritHandle  : Win32.BOOL;
 298       pName           : PSZ) return Win32.HANDLE;
 299    pragma Import (Stdcall, OpenMutex, "OpenMutexA");
 300
 301    function ReleaseMutex (hMutex : Win32.HANDLE) return Win32.BOOL;
 302    pragma Import (Stdcall, ReleaseMutex, "ReleaseMutex");
 303
 304    ---------------------------------------------------
 305    -- Accessing properties of Threads and Processes --
 306    ---------------------------------------------------
 307
 308    -----------------
 309    --  Priorities --
 310    -----------------
 311
 312    function SetThreadPriority
 313      (hThread   : Win32.HANDLE;
 314       nPriority : Interfaces.C.int) return Win32.BOOL;
 315    pragma Import (Stdcall, SetThreadPriority, "SetThreadPriority");
 316
 317    function GetThreadPriority (hThread : Win32.HANDLE) return Interfaces.C.int;
 318    pragma Import (Stdcall, GetThreadPriority, "GetThreadPriority");
 319
 320    function SetPriorityClass
 321      (hProcess        : Win32.HANDLE;
 322       dwPriorityClass : Win32.DWORD) return Win32.BOOL;
 323    pragma Import (Stdcall, SetPriorityClass, "SetPriorityClass");
 324
 325    procedure SetThreadPriorityBoost
 326      (hThread              : Win32.HANDLE;
 327       DisablePriorityBoost : Win32.BOOL);
 328    pragma Import (Stdcall, SetThreadPriorityBoost, "SetThreadPriorityBoost");
 329
 330    Normal_Priority_Class   : constant := 16#00000020#;
 331    Idle_Priority_Class     : constant := 16#00000040#;
 332    High_Priority_Class     : constant := 16#00000080#;
 333    Realtime_Priority_Class : constant := 16#00000100#;
 334
 335    Thread_Priority_Idle          : constant := -15;
 336    Thread_Priority_Lowest        : constant := -2;
 337    Thread_Priority_Below_Normal  : constant := -1;
 338    Thread_Priority_Normal        : constant := 0;
 339    Thread_Priority_Above_Normal  : constant := 1;
 340    Thread_Priority_Highest       : constant := 2;
 341    Thread_Priority_Time_Critical : constant := 15;
 342    Thread_Priority_Error_Return  : constant := Interfaces.C.long'Last;
 343
 344 private
 345
 346    type sigset_t is new Interfaces.C.unsigned_long;
 347
 348    type CRITICAL_SECTION is record
 349       DebugInfo : System.Address;
 350
 351       LockCount      : Long_Integer;
 352       RecursionCount : Long_Integer;
 353       OwningThread   : Win32.HANDLE;
 354       --  The above three fields control entering and exiting the critical
 355       --  section for the resource.
 356
 357       LockSemaphore : Win32.HANDLE;
 358       SpinCount     : Win32.DWORD;
 359    end record;
 360
 361 end System.OS_Interface;