376 lines
14 KiB
Ada
376 lines
14 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1991-1994, Florida State University --
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-- Copyright (C) 1995-2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a NT (native) version of this package
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-- This package encapsulates all direct interfaces to OS services
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-- that are needed by the tasking run-time (libgnarl). For non tasking
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-- oriented services consider declaring them into system-win32.
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-- PLEASE DO NOT add any with-clauses to this package or remove the pragma
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-- Preelaborate. This package is designed to be a bottom-level (leaf) package.
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with Ada.Unchecked_Conversion;
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with Interfaces.C;
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with Interfaces.C.Strings;
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with System.Win32;
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package System.OS_Interface is
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pragma Preelaborate;
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pragma Linker_Options ("-mthreads");
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subtype int is Interfaces.C.int;
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subtype long is Interfaces.C.long;
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subtype LARGE_INTEGER is System.Win32.LARGE_INTEGER;
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-------------------
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-- General Types --
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-------------------
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subtype PSZ is Interfaces.C.Strings.chars_ptr;
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Null_Void : constant Win32.PVOID := System.Null_Address;
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-------------------------
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-- Handles for objects --
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-------------------------
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subtype Thread_Id is Win32.HANDLE;
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-----------
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-- Errno --
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-----------
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NO_ERROR : constant := 0;
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FUNC_ERR : constant := -1;
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-------------
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-- Signals --
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-------------
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Max_Interrupt : constant := 31;
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type Signal is new int range 0 .. Max_Interrupt;
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for Signal'Size use int'Size;
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SIGINT : constant := 2; -- interrupt (Ctrl-C)
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SIGILL : constant := 4; -- illegal instruction (not reset)
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SIGFPE : constant := 8; -- floating point exception
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SIGSEGV : constant := 11; -- segmentation violation
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SIGTERM : constant := 15; -- software termination signal from kill
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SIGBREAK : constant := 21; -- break (Ctrl-Break)
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SIGABRT : constant := 22; -- used by abort, replace SIGIOT in the future
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type sigset_t is private;
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type isr_address is access procedure (sig : int);
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pragma Convention (C, isr_address);
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function intr_attach (sig : int; handler : isr_address) return long;
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pragma Import (C, intr_attach, "signal");
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Intr_Attach_Reset : constant Boolean := True;
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-- True if intr_attach is reset after an interrupt handler is called
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procedure kill (sig : Signal);
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pragma Import (C, kill, "raise");
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------------
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-- Clock --
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------------
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procedure QueryPerformanceFrequency
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(lpPerformanceFreq : access LARGE_INTEGER);
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pragma Import
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(Stdcall, QueryPerformanceFrequency, "QueryPerformanceFrequency");
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-- According to the spec, on XP and later than function cannot fail,
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-- so we ignore the return value and import it as a procedure.
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-------------
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-- Threads --
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-------------
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type Thread_Body is access
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function (arg : System.Address) return System.Address;
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pragma Convention (C, Thread_Body);
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function Thread_Body_Access is new
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Ada.Unchecked_Conversion (System.Address, Thread_Body);
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procedure SwitchToThread;
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pragma Import (Stdcall, SwitchToThread, "SwitchToThread");
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function GetThreadTimes
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(hThread : Win32.HANDLE;
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lpCreationTime : access Long_Long_Integer;
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lpExitTime : access Long_Long_Integer;
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lpKernelTime : access Long_Long_Integer;
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lpUserTime : access Long_Long_Integer) return Win32.BOOL;
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pragma Import (Stdcall, GetThreadTimes, "GetThreadTimes");
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-----------------------
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-- Critical sections --
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-----------------------
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type CRITICAL_SECTION is private;
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-------------------------------------------------------------
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-- Thread Creation, Activation, Suspension And Termination --
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-------------------------------------------------------------
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type PTHREAD_START_ROUTINE is access function
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(pThreadParameter : Win32.PVOID) return Win32.DWORD;
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pragma Convention (Stdcall, PTHREAD_START_ROUTINE);
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function To_PTHREAD_START_ROUTINE is new
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Ada.Unchecked_Conversion (System.Address, PTHREAD_START_ROUTINE);
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function CreateThread
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(pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
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dwStackSize : Win32.DWORD;
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pStartAddress : PTHREAD_START_ROUTINE;
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pParameter : Win32.PVOID;
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dwCreationFlags : Win32.DWORD;
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pThreadId : access Win32.DWORD) return Win32.HANDLE;
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pragma Import (Stdcall, CreateThread, "CreateThread");
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function BeginThreadEx
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(pThreadAttributes : access Win32.SECURITY_ATTRIBUTES;
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dwStackSize : Win32.DWORD;
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pStartAddress : PTHREAD_START_ROUTINE;
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pParameter : Win32.PVOID;
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dwCreationFlags : Win32.DWORD;
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pThreadId : not null access Win32.DWORD) return Win32.HANDLE;
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pragma Import (C, BeginThreadEx, "_beginthreadex");
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Debug_Process : constant := 16#00000001#;
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Debug_Only_This_Process : constant := 16#00000002#;
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Create_Suspended : constant := 16#00000004#;
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Detached_Process : constant := 16#00000008#;
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Create_New_Console : constant := 16#00000010#;
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Create_New_Process_Group : constant := 16#00000200#;
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Create_No_window : constant := 16#08000000#;
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Profile_User : constant := 16#10000000#;
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Profile_Kernel : constant := 16#20000000#;
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Profile_Server : constant := 16#40000000#;
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Stack_Size_Param_Is_A_Reservation : constant := 16#00010000#;
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function GetExitCodeThread
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(hThread : Win32.HANDLE;
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pExitCode : not null access Win32.DWORD) return Win32.BOOL;
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pragma Import (Stdcall, GetExitCodeThread, "GetExitCodeThread");
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function ResumeThread (hThread : Win32.HANDLE) return Win32.DWORD;
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pragma Import (Stdcall, ResumeThread, "ResumeThread");
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function SuspendThread (hThread : Win32.HANDLE) return Win32.DWORD;
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pragma Import (Stdcall, SuspendThread, "SuspendThread");
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procedure ExitThread (dwExitCode : Win32.DWORD);
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pragma Import (Stdcall, ExitThread, "ExitThread");
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procedure EndThreadEx (dwExitCode : Win32.DWORD);
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pragma Import (C, EndThreadEx, "_endthreadex");
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function TerminateThread
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(hThread : Win32.HANDLE;
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dwExitCode : Win32.DWORD) return Win32.BOOL;
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pragma Import (Stdcall, TerminateThread, "TerminateThread");
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function GetCurrentThread return Win32.HANDLE;
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pragma Import (Stdcall, GetCurrentThread, "GetCurrentThread");
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function GetCurrentProcess return Win32.HANDLE;
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pragma Import (Stdcall, GetCurrentProcess, "GetCurrentProcess");
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function GetCurrentThreadId return Win32.DWORD;
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pragma Import (Stdcall, GetCurrentThreadId, "GetCurrentThreadId");
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function TlsAlloc return Win32.DWORD;
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pragma Import (Stdcall, TlsAlloc, "TlsAlloc");
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function TlsGetValue (dwTlsIndex : Win32.DWORD) return Win32.PVOID;
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pragma Import (Stdcall, TlsGetValue, "TlsGetValue");
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function TlsSetValue
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(dwTlsIndex : Win32.DWORD; pTlsValue : Win32.PVOID) return Win32.BOOL;
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pragma Import (Stdcall, TlsSetValue, "TlsSetValue");
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function TlsFree (dwTlsIndex : Win32.DWORD) return Win32.BOOL;
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pragma Import (Stdcall, TlsFree, "TlsFree");
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TLS_Nothing : constant := Win32.DWORD'Last;
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procedure ExitProcess (uExitCode : Interfaces.C.unsigned);
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pragma Import (Stdcall, ExitProcess, "ExitProcess");
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function WaitForSingleObject
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(hHandle : Win32.HANDLE;
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dwMilliseconds : Win32.DWORD) return Win32.DWORD;
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pragma Import (Stdcall, WaitForSingleObject, "WaitForSingleObject");
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function WaitForSingleObjectEx
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(hHandle : Win32.HANDLE;
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dwMilliseconds : Win32.DWORD;
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fAlertable : Win32.BOOL) return Win32.DWORD;
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pragma Import (Stdcall, WaitForSingleObjectEx, "WaitForSingleObjectEx");
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Wait_Infinite : constant := Win32.DWORD'Last;
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WAIT_TIMEOUT : constant := 16#0000_0102#;
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WAIT_FAILED : constant := 16#FFFF_FFFF#;
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------------------------------------
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-- Semaphores, Events and Mutexes --
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------------------------------------
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function CreateSemaphore
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(pSemaphoreAttributes : access Win32.SECURITY_ATTRIBUTES;
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lInitialCount : Interfaces.C.long;
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lMaximumCount : Interfaces.C.long;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, CreateSemaphore, "CreateSemaphoreA");
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function OpenSemaphore
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(dwDesiredAccess : Win32.DWORD;
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bInheritHandle : Win32.BOOL;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, OpenSemaphore, "OpenSemaphoreA");
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function ReleaseSemaphore
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(hSemaphore : Win32.HANDLE;
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lReleaseCount : Interfaces.C.long;
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pPreviousCount : access Win32.LONG) return Win32.BOOL;
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pragma Import (Stdcall, ReleaseSemaphore, "ReleaseSemaphore");
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function CreateEvent
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(pEventAttributes : access Win32.SECURITY_ATTRIBUTES;
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bManualReset : Win32.BOOL;
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bInitialState : Win32.BOOL;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, CreateEvent, "CreateEventA");
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function OpenEvent
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(dwDesiredAccess : Win32.DWORD;
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bInheritHandle : Win32.BOOL;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, OpenEvent, "OpenEventA");
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function SetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
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pragma Import (Stdcall, SetEvent, "SetEvent");
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function ResetEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
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pragma Import (Stdcall, ResetEvent, "ResetEvent");
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function PulseEvent (hEvent : Win32.HANDLE) return Win32.BOOL;
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pragma Import (Stdcall, PulseEvent, "PulseEvent");
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function CreateMutex
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(pMutexAttributes : access Win32.SECURITY_ATTRIBUTES;
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bInitialOwner : Win32.BOOL;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, CreateMutex, "CreateMutexA");
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function OpenMutex
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(dwDesiredAccess : Win32.DWORD;
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bInheritHandle : Win32.BOOL;
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pName : PSZ) return Win32.HANDLE;
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pragma Import (Stdcall, OpenMutex, "OpenMutexA");
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function ReleaseMutex (hMutex : Win32.HANDLE) return Win32.BOOL;
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pragma Import (Stdcall, ReleaseMutex, "ReleaseMutex");
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---------------------------------------------------
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-- Accessing properties of Threads and Processes --
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---------------------------------------------------
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-----------------
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-- Priorities --
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-----------------
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function SetThreadPriority
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(hThread : Win32.HANDLE;
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nPriority : Interfaces.C.int) return Win32.BOOL;
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pragma Import (Stdcall, SetThreadPriority, "SetThreadPriority");
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function GetThreadPriority (hThread : Win32.HANDLE) return Interfaces.C.int;
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pragma Import (Stdcall, GetThreadPriority, "GetThreadPriority");
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function SetPriorityClass
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(hProcess : Win32.HANDLE;
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dwPriorityClass : Win32.DWORD) return Win32.BOOL;
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pragma Import (Stdcall, SetPriorityClass, "SetPriorityClass");
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procedure SetThreadPriorityBoost
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(hThread : Win32.HANDLE;
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DisablePriorityBoost : Win32.BOOL);
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pragma Import (Stdcall, SetThreadPriorityBoost, "SetThreadPriorityBoost");
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Normal_Priority_Class : constant := 16#00000020#;
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Idle_Priority_Class : constant := 16#00000040#;
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High_Priority_Class : constant := 16#00000080#;
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Realtime_Priority_Class : constant := 16#00000100#;
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Thread_Priority_Idle : constant := -15;
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Thread_Priority_Lowest : constant := -2;
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Thread_Priority_Below_Normal : constant := -1;
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Thread_Priority_Normal : constant := 0;
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Thread_Priority_Above_Normal : constant := 1;
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Thread_Priority_Highest : constant := 2;
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Thread_Priority_Time_Critical : constant := 15;
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Thread_Priority_Error_Return : constant := Interfaces.C.long'Last;
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private
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type sigset_t is new Interfaces.C.unsigned_long;
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type CRITICAL_SECTION is record
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DebugInfo : System.Address;
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LockCount : Long_Integer;
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RecursionCount : Long_Integer;
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OwningThread : Win32.HANDLE;
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-- The above three fields control entering and exiting the critical
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-- section for the resource.
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LockSemaphore : Win32.HANDLE;
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SpinCount : Win32.DWORD;
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end record;
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end System.OS_Interface;
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