2 * ReactOS W32 Subsystem
3 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * COPYRIGHT: See COPYING in the top level directory
22 * PROJECT: ReactOS kernel
23 * PURPOSE: GDI Driver Memory Management Functions
24 * FILE: subsys/win32k/eng/mem.c
25 * PROGRAMER: Jason Filby
30 #include <ddk/ntddk.h>
31 #include <ddk/winddi.h>
34 #include <win32k/debug1.h>
37 typedef struct _USERMEMHEADER
42 USERMEMHEADER, *PUSERMEMHEADER;
48 EngAllocMem(ULONG Flags,
54 newMem = ExAllocatePoolWithTag(NonPagedPool, MemSize, Tag); // FIXME: Use PagedPool when it is implemented
56 if(Flags == FL_ZERO_MEMORY)
58 RtlZeroMemory(newMem, MemSize);
77 EngAllocUserMem(ULONG cj, ULONG Tag)
81 ULONG MemSize = sizeof(USERMEMHEADER) + cj;
82 PUSERMEMHEADER Header;
84 Status = ZwAllocateVirtualMemory(NtCurrentProcess(), &NewMem, 0, &MemSize, MEM_COMMIT, PAGE_READWRITE);
86 if (! NT_SUCCESS(Status))
91 Header = (PUSERMEMHEADER) NewMem;
95 return (PVOID)(Header + 1);
102 EngFreeUserMem(PVOID pv)
104 PUSERMEMHEADER Header = ((PUSERMEMHEADER) pv) - 1;
105 ULONG MemSize = sizeof(USERMEMHEADER) + Header->MemSize;
107 ZwFreeVirtualMemory(NtCurrentProcess(), (PVOID *) &Header, &MemSize, MEM_DECOMMIT);
114 EngSecureMem(PVOID Address, ULONG Length)
116 return MmSecureVirtualMemory(Address, Length, PAGE_READWRITE);
123 EngUnsecureMem(HANDLE Mem)
125 return MmUnsecureVirtualMemory((PVOID) Mem);