------------------------------------------------------------------------------ -- -- -- 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) 1995-2004, Free Software Foundation, Inc. -- -- -- -- GNARL 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 2, or (at your option) any later ver- -- -- sion. GNARL 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. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNARL; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNARL was developed by the GNARL team at Florida State University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This is a NT (native) 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 Interfaces.C.Strings; with Unchecked_Conversion; package System.OS_Interface is pragma Preelaborate; pragma Linker_Options ("-mthreads"); subtype int is Interfaces.C.int; subtype long is Interfaces.C.long; ------------------- -- General Types -- ------------------- type DWORD is new Interfaces.C.unsigned_long; type WORD is new Interfaces.C.unsigned_short; -- The LARGE_INTEGER type is actually a fixed point type -- that only can represent integers. The reason for this is -- easier conversion to Duration or other fixed point types. -- (See Operations.Clock) type LARGE_INTEGER is delta 1.0 range -2.0**63 .. 2.0**63 - 1.0; subtype PSZ is Interfaces.C.Strings.chars_ptr; subtype PCHAR is Interfaces.C.Strings.chars_ptr; subtype PVOID is System.Address; Null_Void : constant PVOID := System.Null_Address; type PLONG is access all Interfaces.C.long; type PDWORD is access all DWORD; type BOOL is new Boolean; for BOOL'Size use Interfaces.C.unsigned_long'Size; ------------------------- -- Handles for objects -- ------------------------- type HANDLE is new Interfaces.C.long; type PHANDLE is access all HANDLE; subtype Thread_Id is HANDLE; ----------- -- Errno -- ----------- NO_ERROR : constant := 0; FUNC_ERR : constant := -1; ------------- -- Signals -- ------------- Max_Interrupt : constant := 31; type Signal is new int range 0 .. Max_Interrupt; for Signal'Size use int'Size; SIGINT : constant := 2; -- interrupt (Ctrl-C) SIGILL : constant := 4; -- illegal instruction (not reset) SIGFPE : constant := 8; -- floating point exception SIGSEGV : constant := 11; -- segmentation violation SIGTERM : constant := 15; -- software termination signal from kill SIGBREAK : constant := 21; -- break (Ctrl-Break) SIGABRT : constant := 22; -- used by abort, replace SIGIOT in the future type sigset_t is private; type isr_address is access procedure (sig : int); function intr_attach (sig : int; handler : isr_address) return long; pragma Import (C, intr_attach, "signal"); Intr_Attach_Reset : constant Boolean := True; -- True if intr_attach is reset after an interrupt handler is called procedure kill (sig : Signal); pragma Import (C, kill, "raise"); --------------------- -- Time Management -- --------------------- procedure Sleep (dwMilliseconds : DWORD); pragma Import (Stdcall, Sleep, External_Name => "Sleep"); type SYSTEMTIME is record wYear : WORD; wMonth : WORD; wDayOfWeek : WORD; wDay : WORD; wHour : WORD; wMinute : WORD; wSecond : WORD; wMilliseconds : WORD; end record; procedure GetSystemTime (pSystemTime : access SYSTEMTIME); pragma Import (Stdcall, GetSystemTime, "GetSystemTime"); procedure GetSystemTimeAsFileTime (lpFileTime : access Long_Long_Integer); pragma Import (Stdcall, GetSystemTimeAsFileTime, "GetSystemTimeAsFileTime"); function SetSystemTime (pSystemTime : access SYSTEMTIME) return BOOL; pragma Import (Stdcall, SetSystemTime, "SetSystemTime"); function FileTimeToSystemTime (lpFileTime : access Long_Long_Integer; lpSystemTime : access SYSTEMTIME) return BOOL; pragma Import (Stdcall, FileTimeToSystemTime, "FileTimeToSystemTime"); function SystemTimeToFileTime (lpSystemTime : access SYSTEMTIME; lpFileTime : access Long_Long_Integer) return BOOL; pragma Import (Stdcall, SystemTimeToFileTime, "SystemTimeToFileTime"); function FileTimeToLocalFileTime (lpFileTime : access Long_Long_Integer; lpLocalFileTime : access Long_Long_Integer) return BOOL; pragma Import (Stdcall, FileTimeToLocalFileTime, "FileTimeToLocalFileTime"); function LocalFileTimeToFileTime (lpFileTime : access Long_Long_Integer; lpLocalFileTime : access Long_Long_Integer) return BOOL; pragma Import (Stdcall, LocalFileTimeToFileTime, "LocalFileTimeToFileTime"); function QueryPerformanceCounter (lpPerformanceCount : access LARGE_INTEGER) return BOOL; pragma Import (Stdcall, QueryPerformanceCounter, "QueryPerformanceCounter"); function QueryPerformanceFrequency (lpFrequency : access LARGE_INTEGER) return BOOL; pragma Import (Stdcall, QueryPerformanceFrequency, "QueryPerformanceFrequency"); ------------- -- Threads -- ------------- type Thread_Body is access function (arg : System.Address) return System.Address; function Thread_Body_Access is new Unchecked_Conversion (System.Address, Thread_Body); procedure SwitchToThread; pragma Import (Stdcall, SwitchToThread, "SwitchToThread"); ----------------------- -- Critical sections -- ----------------------- type CRITICAL_SECTION is private; type PCRITICAL_SECTION is access all CRITICAL_SECTION; procedure InitializeCriticalSection (pCriticalSection : PCRITICAL_SECTION); pragma Import (Stdcall, InitializeCriticalSection, "InitializeCriticalSection"); procedure EnterCriticalSection (pCriticalSection : PCRITICAL_SECTION); pragma Import (Stdcall, EnterCriticalSection, "EnterCriticalSection"); procedure LeaveCriticalSection (pCriticalSection : PCRITICAL_SECTION); pragma Import (Stdcall, LeaveCriticalSection, "LeaveCriticalSection"); procedure DeleteCriticalSection (pCriticalSection : PCRITICAL_SECTION); pragma Import (Stdcall, DeleteCriticalSection, "DeleteCriticalSection"); ------------------------------------------------------------- -- Thread Creation, Activation, Suspension And Termination -- ------------------------------------------------------------- type PTHREAD_START_ROUTINE is access function (pThreadParameter : PVOID) return DWORD; pragma Convention (Stdcall, PTHREAD_START_ROUTINE); function To_PTHREAD_START_ROUTINE is new Unchecked_Conversion (System.Address, PTHREAD_START_ROUTINE); type SECURITY_ATTRIBUTES is record nLength : DWORD; pSecurityDescriptor : PVOID; bInheritHandle : BOOL; end record; type PSECURITY_ATTRIBUTES is access all SECURITY_ATTRIBUTES; function CreateThread (pThreadAttributes : PSECURITY_ATTRIBUTES; dwStackSize : DWORD; pStartAddress : PTHREAD_START_ROUTINE; pParameter : PVOID; dwCreationFlags : DWORD; pThreadId : PDWORD) return HANDLE; pragma Import (Stdcall, CreateThread, "CreateThread"); function BeginThreadEx (pThreadAttributes : PSECURITY_ATTRIBUTES; dwStackSize : DWORD; pStartAddress : PTHREAD_START_ROUTINE; pParameter : PVOID; dwCreationFlags : DWORD; pThreadId : PDWORD) return HANDLE; pragma Import (C, BeginThreadEx, "_beginthreadex"); Debug_Process : constant := 16#00000001#; Debug_Only_This_Process : constant := 16#00000002#; Create_Suspended : constant := 16#00000004#; Detached_Process : constant := 16#00000008#; Create_New_Console : constant := 16#00000010#; Create_New_Process_Group : constant := 16#00000200#; Create_No_window : constant := 16#08000000#; Profile_User : constant := 16#10000000#; Profile_Kernel : constant := 16#20000000#; Profile_Server : constant := 16#40000000#; function GetExitCodeThread (hThread : HANDLE; pExitCode : PDWORD) return BOOL; pragma Import (Stdcall, GetExitCodeThread, "GetExitCodeThread"); function ResumeThread (hThread : HANDLE) return DWORD; pragma Import (Stdcall, ResumeThread, "ResumeThread"); function SuspendThread (hThread : HANDLE) return DWORD; pragma Import (Stdcall, SuspendThread, "SuspendThread"); procedure ExitThread (dwExitCode : DWORD); pragma Import (Stdcall, ExitThread, "ExitThread"); procedure EndThreadEx (dwExitCode : DWORD); pragma Import (C, EndThreadEx, "_endthreadex"); function TerminateThread (hThread : HANDLE; dwExitCode : DWORD) return BOOL; pragma Import (Stdcall, TerminateThread, "TerminateThread"); function GetCurrentThread return HANDLE; pragma Import (Stdcall, GetCurrentThread, "GetCurrentThread"); function GetCurrentProcess return HANDLE; pragma Import (Stdcall, GetCurrentProcess, "GetCurrentProcess"); function GetCurrentThreadId return DWORD; pragma Import (Stdcall, GetCurrentThreadId, "GetCurrentThreadId"); function TlsAlloc return DWORD; pragma Import (Stdcall, TlsAlloc, "TlsAlloc"); function TlsGetValue (dwTlsIndex : DWORD) return PVOID; pragma Import (Stdcall, TlsGetValue, "TlsGetValue"); function TlsSetValue (dwTlsIndex : DWORD; pTlsValue : PVOID) return BOOL; pragma Import (Stdcall, TlsSetValue, "TlsSetValue"); function TlsFree (dwTlsIndex : DWORD) return BOOL; pragma Import (Stdcall, TlsFree, "TlsFree"); TLS_Nothing : constant := DWORD'Last; procedure ExitProcess (uExitCode : Interfaces.C.unsigned); pragma Import (Stdcall, ExitProcess, "ExitProcess"); function WaitForSingleObject (hHandle : HANDLE; dwMilliseconds : DWORD) return DWORD; pragma Import (Stdcall, WaitForSingleObject, "WaitForSingleObject"); function WaitForSingleObjectEx (hHandle : HANDLE; dwMilliseconds : DWORD; fAlertable : BOOL) return DWORD; pragma Import (Stdcall, WaitForSingleObjectEx, "WaitForSingleObjectEx"); Wait_Infinite : constant := DWORD'Last; WAIT_TIMEOUT : constant := 16#0000_0102#; WAIT_FAILED : constant := 16#FFFF_FFFF#; ------------------------------------ -- Semaphores, Events and Mutexes -- ------------------------------------ function CloseHandle (hObject : HANDLE) return BOOL; pragma Import (Stdcall, CloseHandle, "CloseHandle"); function CreateSemaphore (pSemaphoreAttributes : PSECURITY_ATTRIBUTES; lInitialCount : Interfaces.C.long; lMaximumCount : Interfaces.C.long; pName : PSZ) return HANDLE; pragma Import (Stdcall, CreateSemaphore, "CreateSemaphoreA"); function OpenSemaphore (dwDesiredAccess : DWORD; bInheritHandle : BOOL; pName : PSZ) return HANDLE; pragma Import (Stdcall, OpenSemaphore, "OpenSemaphoreA"); function ReleaseSemaphore (hSemaphore : HANDLE; lReleaseCount : Interfaces.C.long; pPreviousCount : PLONG) return BOOL; pragma Import (Stdcall, ReleaseSemaphore, "ReleaseSemaphore"); function CreateEvent (pEventAttributes : PSECURITY_ATTRIBUTES; bManualReset : BOOL; bInitialState : BOOL; pName : PSZ) return HANDLE; pragma Import (Stdcall, CreateEvent, "CreateEventA"); function OpenEvent (dwDesiredAccess : DWORD; bInheritHandle : BOOL; pName : PSZ) return HANDLE; pragma Import (Stdcall, OpenEvent, "OpenEventA"); function SetEvent (hEvent : HANDLE) return BOOL; pragma Import (Stdcall, SetEvent, "SetEvent"); function ResetEvent (hEvent : HANDLE) return BOOL; pragma Import (Stdcall, ResetEvent, "ResetEvent"); function PulseEvent (hEvent : HANDLE) return BOOL; pragma Import (Stdcall, PulseEvent, "PulseEvent"); function CreateMutex (pMutexAttributes : PSECURITY_ATTRIBUTES; bInitialOwner : BOOL; pName : PSZ) return HANDLE; pragma Import (Stdcall, CreateMutex, "CreateMutexA"); function OpenMutex (dwDesiredAccess : DWORD; bInheritHandle : BOOL; pName : PSZ) return HANDLE; pragma Import (Stdcall, OpenMutex, "OpenMutexA"); function ReleaseMutex (hMutex : HANDLE) return BOOL; pragma Import (Stdcall, ReleaseMutex, "ReleaseMutex"); --------------------------------------------------- -- Accessing properties of Threads and Processes -- --------------------------------------------------- ----------------- -- Priorities -- ----------------- function SetThreadPriority (hThread : HANDLE; nPriority : Interfaces.C.int) return BOOL; pragma Import (Stdcall, SetThreadPriority, "SetThreadPriority"); function GetThreadPriority (hThread : HANDLE) return Interfaces.C.int; pragma Import (Stdcall, GetThreadPriority, "GetThreadPriority"); function SetPriorityClass (hProcess : HANDLE; dwPriorityClass : DWORD) return BOOL; pragma Import (Stdcall, SetPriorityClass, "SetPriorityClass"); procedure SetThreadPriorityBoost (hThread : HANDLE; DisablePriorityBoost : BOOL); pragma Import (Stdcall, SetThreadPriorityBoost, "SetThreadPriorityBoost"); Normal_Priority_Class : constant := 16#00000020#; Idle_Priority_Class : constant := 16#00000040#; High_Priority_Class : constant := 16#00000080#; Realtime_Priority_Class : constant := 16#00000100#; Thread_Priority_Idle : constant := -15; Thread_Priority_Lowest : constant := -2; Thread_Priority_Below_Normal : constant := -1; Thread_Priority_Normal : constant := 0; Thread_Priority_Above_Normal : constant := 1; Thread_Priority_Highest : constant := 2; Thread_Priority_Time_Critical : constant := 15; Thread_Priority_Error_Return : constant := Interfaces.C.long'Last; function GetLastError return DWORD; pragma Import (Stdcall, GetLastError, "GetLastError"); private type sigset_t is new Interfaces.C.unsigned_long; type CRITICAL_SECTION is record DebugInfo : System.Address; -- The following three fields control entering and -- exiting the critical section for the resource LockCount : Long_Integer; RecursionCount : Long_Integer; OwningThread : HANDLE; LockSemaphore : HANDLE; Reserved : DWORD; end record; end System.OS_Interface;