104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
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* Global heap functions
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*
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* Copyright 1995 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* 0xffff sometimes seems to mean: CURRENT_DS */
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#include "config.h"
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#include "wine/port.h"
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#include <sys/types.h>
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#include <stdlib.h>
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#include <time.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <string.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_SYSCTL_H
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#include <sys/sysctl.h>
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#endif
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#include "wine/winbase16.h"
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#include "ntstatus.h"
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#include "global.h"
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#include "toolhelp.h"
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#include "selectors.h"
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#include "miscemu.h"
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#include "stackframe.h"
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#include "wine/debug.h"
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#include "winerror.h"
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WINE_DEFAULT_DEBUG_CHANNEL(global);
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/* Global arena block */
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typedef struct
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{
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DWORD base; /* Base address (0 if discarded) */
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DWORD size; /* Size in bytes (0 indicates a free block) */
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HGLOBAL16 handle; /* Handle for this block */
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HGLOBAL16 hOwner; /* Owner of this block */
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BYTE lockCount; /* Count of GlobalFix() calls */
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BYTE pageLockCount; /* Count of GlobalPageLock() calls */
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BYTE flags; /* Allocation flags */
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BYTE selCount; /* Number of selectors allocated for this block */
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} GLOBALARENA;
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/* Arena array */
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/*static*/ GLOBALARENA *pGlobalArena = NULL;
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/*static*/ int globalArenaSize = 0;
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#define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
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#define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
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/***********************************************************************
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* GlobalLock16 (KERNEL32.25)
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*
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* This is the GlobalLock16() function used by 32-bit code.
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*
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* RETURNS
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* Pointer to first byte of memory block
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* NULL: Failure
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*/
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LPVOID WINAPI GlobalLock16(
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HGLOBAL16 handle /* [in] Handle of global memory object */
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) {
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if (!handle) return 0;
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if (!VALID_HANDLE(handle))
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return 0;
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GET_ARENA_PTR(handle)->lockCount++;
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return (LPVOID)GET_ARENA_PTR(handle)->base;
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}
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/***********************************************************************
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* FarGetOwner (KERNEL.404)
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*/
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HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
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{
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if (!VALID_HANDLE(handle)) {
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WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
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return 0;
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}
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return GET_ARENA_PTR(handle)->hOwner;
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}
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