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+------------------------------------------------------------------------------
+-- --
+-- GNAT 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) 1995-2011, Free Software Foundation, Inc. --
+-- --
+-- GNAT 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 3, or (at your option) any later ver- --
+-- sion. GNAT 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- 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 the tasking run-time (libgnarl). For non tasking
+-- oriented services consider declaring them into system-win32.
+
+-- 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 Ada.Unchecked_Conversion;
+
+with Interfaces.C;
+with Interfaces.C.Strings;
+with System.Win32;
+
+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 --
+ -------------------
+
+ subtype PSZ is Interfaces.C.Strings.chars_ptr;
+
+ Null_Void : constant Win32.PVOID := System.Null_Address;
+
+ -------------------------
+ -- Handles for objects --
+ -------------------------
+
+ subtype Thread_Id is Win32.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);
+ pragma Convention (C, isr_address);
+
+ 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");
+
+ -------------
+ -- Threads --
+ -------------
+
+ type Thread_Body is access
+ function (arg : System.Address) return System.Address;
+ pragma Convention (C, Thread_Body);
+
+ function Thread_Body_Access is new
+ Ada.Unchecked_Conversion (System.Address, Thread_Body);
+
+ procedure SwitchToThread;
+ pragma Import (Stdcall, SwitchToThread, "SwitchToThread");
+
+ function GetThreadTimes
+ (hThread : Win32.HANDLE;
+ lpCreationTime : access Long_Long_Integer;
+ lpExitTime : access Long_Long_Integer;
+ lpKernelTime : access Long_Long_Integer;
+ lpUserTime : access Long_Long_Integer) return Win32.BOOL;
+ pragma Import (Stdcall, GetThreadTimes, "GetThreadTimes");
+
+ -----------------------
+ -- Critical sections --
+ -----------------------
+
+ type CRITICAL_SECTION is private;
+
+ -------------------------------------------------------------
+ -- Thread Creation, Activation, Suspension And Termination --
+ -------------------------------------------------------------
+
+ type PTHREAD_START_ROUTINE is access function
+ (pThreadParameter : Win32.PVOID) return Win32.DWORD;
+ pragma Convention (Stdcall, PTHREAD_START_ROUTINE);
+
+ function To_PTHREAD_START_ROUTINE is new
+ Ada.Unchecked_Conversion (System.Address, PTHREAD_START_ROUTINE);
+
+ function CreateThread
+ (pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
+ dwStackSize : Win32.DWORD;
+ pStartAddress : PTHREAD_START_ROUTINE;
+ pParameter : Win32.PVOID;
+ dwCreationFlags : Win32.DWORD;
+ pThreadId : access Win32.DWORD) return Win32.HANDLE;
+ pragma Import (Stdcall, CreateThread, "CreateThread");
+
+ function BeginThreadEx
+ (pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
+ dwStackSize : Win32.DWORD;
+ pStartAddress : PTHREAD_START_ROUTINE;
+ pParameter : Win32.PVOID;
+ dwCreationFlags : Win32.DWORD;
+ pThreadId : not null access Win32.DWORD) return Win32.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#;
+
+ Stack_Size_Param_Is_A_Reservation : constant := 16#00010000#;
+
+ function GetExitCodeThread
+ (hThread : Win32.HANDLE;
+ pExitCode : not null access Win32.DWORD) return Win32.BOOL;
+ pragma Import (Stdcall, GetExitCodeThread, "GetExitCodeThread");
+
+ function ResumeThread (hThread : Win32.HANDLE) return Win32.DWORD;
+ pragma Import (Stdcall, ResumeThread, "ResumeThread");
+
+ function SuspendThread (hThread : Win32.HANDLE) return Win32.DWORD;
+ pragma Import (Stdcall, SuspendThread, "SuspendThread");
+
+ procedure ExitThread (dwExitCode : Win32.DWORD);
+ pragma Import (Stdcall, ExitThread, "ExitThread");
+
+ procedure EndThreadEx (dwExitCode : Win32.DWORD);
+ pragma Import (C, EndThreadEx, "_endthreadex");
+
+ function TerminateThread
+ (hThread : Win32.HANDLE;
+ dwExitCode : Win32.DWORD) return Win32.BOOL;
+ pragma Import (Stdcall, TerminateThread, "TerminateThread");
+
+ function GetCurrentThread return Win32.HANDLE;
+ pragma Import (Stdcall, GetCurrentThread, "GetCurrentThread");
+
+ function GetCurrentProcess return Win32.HANDLE;
+ pragma Import (Stdcall, GetCurrentProcess, "GetCurrentProcess");
+
+ function GetCurrentThreadId return Win32.DWORD;
+ pragma Import (Stdcall, GetCurrentThreadId, "GetCurrentThreadId");
+
+ function TlsAlloc return Win32.DWORD;
+ pragma Import (Stdcall, TlsAlloc, "TlsAlloc");
+
+ function TlsGetValue (dwTlsIndex : Win32.DWORD) return Win32.PVOID;
+ pragma Import (Stdcall, TlsGetValue, "TlsGetValue");
+
+ function TlsSetValue
+ (dwTlsIndex : Win32.DWORD; pTlsValue : Win32.PVOID) return Win32.BOOL;
+ pragma Import (Stdcall, TlsSetValue, "TlsSetValue");
+
+ function TlsFree (dwTlsIndex : Win32.DWORD) return Win32.BOOL;
+ pragma Import (Stdcall, TlsFree, "TlsFree");
+
+ TLS_Nothing : constant := Win32.DWORD'Last;
+
+ procedure ExitProcess (uExitCode : Interfaces.C.unsigned);
+ pragma Import (Stdcall, ExitProcess, "ExitProcess");
+
+ function WaitForSingleObject
+ (hHandle : Win32.HANDLE;
+ dwMilliseconds : Win32.DWORD) return Win32.DWORD;
+ pragma Import (Stdcall, WaitForSingleObject, "WaitForSingleObject");
+
+ function WaitForSingleObjectEx
+ (hHandle : Win32.HANDLE;
+ dwMilliseconds : Win32.DWORD;
+ fAlertable : Win32.BOOL) return Win32.DWORD;
+ pragma Import (Stdcall, WaitForSingleObjectEx, "WaitForSingleObjectEx");
+
+ Wait_Infinite : constant := Win32.DWORD'Last;
+ WAIT_TIMEOUT : constant := 16#0000_0102#;
+ WAIT_FAILED : constant := 16#FFFF_FFFF#;
+
+ ------------------------------------
+ -- Semaphores, Events and Mutexes --
+ ------------------------------------
+
+ function CreateSemaphore
+ (pSemaphoreAttributes : access Win32.SECURITY_ATTRIBUTES;
+ lInitialCount : Interfaces.C.long;
+ lMaximumCount : Interfaces.C.long;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, CreateSemaphore, "CreateSemaphoreA");
+
+ function OpenSemaphore
+ (dwDesiredAccess : Win32.DWORD;
+ bInheritHandle : Win32.BOOL;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, OpenSemaphore, "OpenSemaphoreA");
+
+ function ReleaseSemaphore
+ (hSemaphore : Win32.HANDLE;
+ lReleaseCount : Interfaces.C.long;
+ pPreviousCount : access Win32.LONG) return Win32.BOOL;
+ pragma Import (Stdcall, ReleaseSemaphore, "ReleaseSemaphore");
+
+ function CreateEvent
+ (pEventAttributes : access Win32.SECURITY_ATTRIBUTES;
+ bManualReset : Win32.BOOL;
+ bInitialState : Win32.BOOL;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, CreateEvent, "CreateEventA");
+
+ function OpenEvent
+ (dwDesiredAccess : Win32.DWORD;
+ bInheritHandle : Win32.BOOL;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, OpenEvent, "OpenEventA");
+
+ function SetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
+ pragma Import (Stdcall, SetEvent, "SetEvent");
+
+ function ResetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
+ pragma Import (Stdcall, ResetEvent, "ResetEvent");
+
+ function PulseEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
+ pragma Import (Stdcall, PulseEvent, "PulseEvent");
+
+ function CreateMutex
+ (pMutexAttributes : access Win32.SECURITY_ATTRIBUTES;
+ bInitialOwner : Win32.BOOL;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, CreateMutex, "CreateMutexA");
+
+ function OpenMutex
+ (dwDesiredAccess : Win32.DWORD;
+ bInheritHandle : Win32.BOOL;
+ pName : PSZ) return Win32.HANDLE;
+ pragma Import (Stdcall, OpenMutex, "OpenMutexA");
+
+ function ReleaseMutex (hMutex : Win32.HANDLE) return Win32.BOOL;
+ pragma Import (Stdcall, ReleaseMutex, "ReleaseMutex");
+
+ ---------------------------------------------------
+ -- Accessing properties of Threads and Processes --
+ ---------------------------------------------------
+
+ -----------------
+ -- Priorities --
+ -----------------
+
+ function SetThreadPriority
+ (hThread : Win32.HANDLE;
+ nPriority : Interfaces.C.int) return Win32.BOOL;
+ pragma Import (Stdcall, SetThreadPriority, "SetThreadPriority");
+
+ function GetThreadPriority (hThread : Win32.HANDLE) return Interfaces.C.int;
+ pragma Import (Stdcall, GetThreadPriority, "GetThreadPriority");
+
+ function SetPriorityClass
+ (hProcess : Win32.HANDLE;
+ dwPriorityClass : Win32.DWORD) return Win32.BOOL;
+ pragma Import (Stdcall, SetPriorityClass, "SetPriorityClass");
+
+ procedure SetThreadPriorityBoost
+ (hThread : Win32.HANDLE;
+ DisablePriorityBoost : Win32.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;
+
+private
+
+ type sigset_t is new Interfaces.C.unsigned_long;
+
+ type CRITICAL_SECTION is record
+ DebugInfo : System.Address;
+
+ LockCount : Long_Integer;
+ RecursionCount : Long_Integer;
+ OwningThread : Win32.HANDLE;
+ -- The above three fields control entering and exiting the critical
+ -- section for the resource.
+
+ LockSemaphore : Win32.HANDLE;
+ SpinCount : Win32.DWORD;
+ end record;
+
+end System.OS_Interface;