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handleio

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git-svn-id: svn://kolibrios.org@613 a494cfbc-eb01-0410-851d-a64ba20cac60
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Sergey Semyonov (Serge)
2007-08-26 09:08:14 +00:00
parent 4bfb625f10
commit 52facee6d5
10 changed files with 1069 additions and 0 deletions
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257
programs/develop/open watcom/trunk/clib/handleio/hdlman.c Normal file
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/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Handle manager routines.
*
****************************************************************************/
#include "variety.h"
#include <stdio.h>
#include <stdlib.h>
#include "liballoc.h"
#include <string.h>
#ifdef _M_IX86
#include <i86.h>
#endif
#include <unistd.h>
#include <errno.h>
#if defined(__OS2__)
#elif defined(__WINDOWS__) || defined(__NT__)
#endif
#include "iomode.h"
#include "fileacc.h"
#include "rtinit.h"
#include "seterrno.h"
#include "handleio.h"
#undef __getOSHandle
extern unsigned __NFiles; // the size of the iomode array
extern void __grow_iomode( int num );
unsigned __NHandles = 0;
#if defined(__NT__)
HANDLE *__OSHandles = NULL;
unsigned __growPOSIXHandles( unsigned num )
{
HANDLE *new2;
unsigned i;
if( num > __NHandles )
{
_AccessFList();
if( __OSHandles == NULL )
{
new2 = lib_malloc( num * sizeof( int ) );
}
else
{
new2 = lib_realloc( __OSHandles, num * sizeof( int ) );
}
if( new2 == NULL )
{
__set_errno( ENOMEM );
num = __NHandles;
}
else
{
for( i = __NHandles; i < num; i++ )
{
new2[ i ] = NULL_HANDLE;
}
__OSHandles = new2;
__NHandles = num;
}
_ReleaseFList();
}
return( __NHandles );
}
int __allocPOSIXHandle( HANDLE hdl )
{
int i;
_AccessFList();
for( i = 0; i < __NHandles; i++ )
{
if( __OSHandles[i] == NULL_HANDLE ) break;
}
if( i >= __NHandles )
{
// 20 -> (20+10+1) -> 31
// 31 -> (31+15+1) -> 47
// 47 -> (47+23+1) -> 71
__growPOSIXHandles( i + (i >> 1) + 1 );
// keep iomode array in sync
if( __NHandles > __NFiles ) __grow_iomode( __NHandles );
for( ; i < __NHandles; i++ )
{
if( __OSHandles[i] == NULL_HANDLE ) break;
}
}
if( i >= __NHandles )
{
i = -1;
} else {
__OSHandles[i] = hdl;
}
_ReleaseFList();
return( i );
}
void __freePOSIXHandle( int hid )
{
__OSHandles[ hid ] = NULL_HANDLE;
}
HANDLE __getOSHandle( int hid )
{
return( __OSHandles[ hid ] );
}
int __setOSHandle( unsigned hid, HANDLE hdl )
{
// call the Win32 API for a standard file handle
switch( hid ) {
case STDIN_FILENO:
// SetStdHandle( STD_INPUT_HANDLE, hdl );
break;
case STDOUT_FILENO:
// SetStdHandle( STD_OUTPUT_HANDLE, hdl );
break;
case STDERR_FILENO:
// SetStdHandle( STD_ERROR_HANDLE, hdl );
break;
}
if( hid < __NHandles )
{
__OSHandles[ hid ] = hdl;
}
else
{
hid = (unsigned)-1; // this should never happen
}
return( hid );
}
HANDLE *__FakeHandles = 0;
static int __topFakeHandle = 0;
HANDLE __NTGetFakeHandle( void )
{
HANDLE os_handle;
static DWORD fakeHandle = 0x80000000L;
_AccessFList();
fakeHandle++;
os_handle = (HANDLE)fakeHandle;
_ReleaseFList();
return( os_handle );
}
// called from library startup code
void __initPOSIXHandles( void )
{
HANDLE h;
// __OSHandles = NULL;
// __NHandles = 0;
__growPOSIXHandles( __NFiles );
h = 0; //GetStdHandle( STD_INPUT_HANDLE );
if( h == 0 || h == INVALID_HANDLE_VALUE ) {
h = (HANDLE)__NTGetFakeHandle();
}
__allocPOSIXHandle( h ); // should return 0==STDIN_FILENO
h = 0; //GetStdHandle( STD_OUTPUT_HANDLE );
if( h == 0 || h == INVALID_HANDLE_VALUE ) {
h = (HANDLE)__NTGetFakeHandle();
}
__allocPOSIXHandle( h ); // should return 1==STDOUT_FILENO
h = 0; //GetStdHandle( STD_ERROR_HANDLE );
if( h == 0 || h == INVALID_HANDLE_VALUE ) {
h = (HANDLE)__NTGetFakeHandle();
}
__allocPOSIXHandle( h ); // should return 3==STDERR_FILENO
}
static void __finiPOSIXHandles( void )
{
if( __OSHandles != NULL ) {
lib_free( __OSHandles );
__OSHandles = NULL;
}
if( __FakeHandles != NULL )
{
int i;
for( i = 0 ; i < __topFakeHandle ; i++ )
{
// CloseHandle( __FakeHandles[i] );
}
lib_free( __FakeHandles );
__FakeHandles = 0;
}
}
AYI( __finiPOSIXHandles, INIT_PRIORITY_LIBRARY-1 )
#endif
void __set_handles( int num )
{
__NHandles = num;
}
_WCRTLINK int _grow_handles( int num )
{
if( num > __NHandles )
{
#if defined(MSDOS)
#elif defined( __OS2_286__ )
#elif defined( __WARP__ )
#elif defined(__WINDOWS__)
#elif defined(__NT__)
{
num = __growPOSIXHandles( num );
}
#elif defined(__NETWARE__)
#elif defined(__UNIX__)
#endif
if( num > __NFiles ) {
__grow_iomode( num ); // sets new __NFiles if successful
}
__NHandles = num;
}
return( __NHandles );
}