//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft shared
// source or premium shared source license agreement under which you licensed
// this source code. If you did not accept the terms of the license agreement,
// you are not authorized to use this source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the SOURCE.RTF on your install media or the root of your tools installation.
// THE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES OR INDEMNITIES.
//
/***
*initcon.c - direct console I/O initialization and termination for Win32
*
*       Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Defines __initconin() and _initconout() and __termcon() routines.
*       The first two are called on demand to initialize _coninpfh and
*       _confh, and the third is called indirectly by CRTL termination.
*
*       NOTE:   The __termcon() routine is called indirectly by the C/C++
*               Run-Time Library termination code.
*
*Revision History:
*       07-26-91  GJF   Module created. Based on the original code by Stevewo
*                       (which was distributed across several sources).
*       03-12-92  SKS   Split out initializer
*       04-06-93  SKS   Replace _CRTAPI* with __cdecl
*       10-28-93  GJF   Define entries for initialization and termination
*                       sections (used to be i386\cinitcon.asm).
*       04-12-94  GJF   Made _initcon() and _termcon() into empty functions
*                       for the Win32s version of msvcrt*.dll.
*       12-08-95  SKS   Replaced __initcon() with __initconin()/__initconout().
*                       _confh and _coninfh are no longer initialized during
*                       CRTL start-up but rather on demand in _getch(),
*                       _putch(), _cgets(), _cputs(), and _kbhit().
*       07-08-96  GJF   Removed Win32s support.Also, detab-ed.
*       02-07-98  GJF   Changes for Win64: _coninph and _confh are now an 
*                       intptr_t.
*       04-28-99  PML   Wrap __declspec(allocate()) in _CRTALLOC macro.
*       02-11-05  AC    Remove redundant #pragma section
*                       VSW#445138
*
*******************************************************************************/

#ifdef _WIN32_WCE
#ifndef _UNICODE   /* CRT flag */
#define _UNICODE 1
#endif

#ifndef UNICODE	   /* OS flag */
#define UNICODE 1
#endif
#endif // _WIN32_WCE

#include <sect_attribs.h>
#include <cruntime.h>
#include <internal.h>
#include <oscalls.h>

void __cdecl __termconin(void);

_CRTALLOC(".CRT$XPX") static  _PVFV pterm = __termconin;

/*
 * define console handles. these definitions cause this file to be linked
 * in if one of the direct console I/O functions is referenced.
 * The value (-2) is used to indicate the un-initialized state.
 */
intptr_t _coninpfh = -2;    /* console input */


/***
*void __initconin(void) - open handles for console input
*
*Purpose:
*       Opens handle for console input.
*
*Entry:
*       None.
*
*Exit:
*       No return value. If successful, the handle value is copied into the
*       global variable _coninpfh.  Otherwise _coninpfh is set to -1.
*
*Exceptions:
*
*******************************************************************************/

void __cdecl __initconin (
        void
        )
{
    _coninpfh = (intptr_t) CreateFileW(L"CONIN$",
                                       GENERIC_READ | GENERIC_WRITE,
                                       FILE_SHARE_READ | FILE_SHARE_WRITE,
                                       NULL,
                                       OPEN_EXISTING,
                                       0,
                                       NULL);
}


/***
*void __termconin(void) - close console input handle
*
*Purpose:
*       Closes _coninpfh
*
*Entry:
*       None.
*
*Exit:
*       No return value.
*
*Exceptions:
*
*******************************************************************************/

void __cdecl __termconin (
        void
        )
{
    if ((_coninpfh != -1) && (_coninpfh != -2)) {
        CloseHandle((HANDLE) _coninpfh);
    }
}
