diff options
Diffstat (limited to 'mozilla/nsprpub/lib/msgc/src/win32gc.c')
-rw-r--r-- | mozilla/nsprpub/lib/msgc/src/win32gc.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/mozilla/nsprpub/lib/msgc/src/win32gc.c b/mozilla/nsprpub/lib/msgc/src/win32gc.c new file mode 100644 index 0000000..eec8377 --- /dev/null +++ b/mozilla/nsprpub/lib/msgc/src/win32gc.c @@ -0,0 +1,129 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is the Netscape Portable Runtime (NSPR). + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* + * GC related routines + * + */ +#include <windows.h> +#include "prlog.h" + +extern PRLogModuleInfo* _pr_msgc_lm; + +#define GC_VMBASE 0x40000000 +#define GC_VMLIMIT 0x00FFFFFF + +/************************************************************************/ +/* +** Machine dependent GC Heap management routines: +** _MD_GrowGCHeap +*/ +/************************************************************************/ + +void *baseaddr = (void*) GC_VMBASE; +void *lastaddr = (void*) GC_VMBASE; + +void _MD_InitGC() {} + +void *_MD_GrowGCHeap(PRUint32 *sizep) +{ + void *addr; + size_t size; + + /* Reserve a block of memory for the GC */ + if( lastaddr == baseaddr ) { + addr = VirtualAlloc( (void *)GC_VMBASE, GC_VMLIMIT, MEM_RESERVE, PAGE_READWRITE ); + + /* + ** If the GC_VMBASE address is already mapped, then let the OS choose a + ** base address that is available... + */ + if (addr == NULL) { + addr = VirtualAlloc( NULL, GC_VMLIMIT, MEM_RESERVE, PAGE_READWRITE ); + + baseaddr = lastaddr = addr; + if (addr == NULL) { + PR_LOG(_pr_msgc_lm, PR_LOG_ALWAYS, ("GC: unable to allocate heap: LastError=%ld", + GetLastError())); + return 0; + } + } + } + size = *sizep; + + /* Extend the mapping */ + addr = VirtualAlloc( lastaddr, size, MEM_COMMIT, PAGE_READWRITE ); + if (addr == NULL) { + return 0; + } + + lastaddr = ((char*)addr + size); + PR_LOG(_pr_msgc_lm, PR_LOG_ALWAYS, + ("GC: heap extends from %08x to %08x", + baseaddr, (long)baseaddr + (char*)lastaddr - (char*)baseaddr)); + + return addr; +} + +PRBool _MD_ExtendGCHeap(char *base, PRInt32 oldSize, PRInt32 newSize) { + void* addr; + + addr = VirtualAlloc( base + oldSize, newSize - oldSize, + MEM_COMMIT, PAGE_READWRITE ); + if (NULL == addr) { + PR_LOG(_pr_msgc_lm, PR_LOG_ALWAYS, ("GC: unable to extend heap: LastError=%ld", + GetLastError())); + return PR_FALSE; + } + if (base + oldSize != (char*)addr) { + PR_LOG(_pr_msgc_lm, PR_LOG_ALWAYS, ("GC: segment extension returned %x instead of %x", + addr, base + oldSize)); + VirtualFree(addr, newSize - oldSize, MEM_DECOMMIT); + return PR_FALSE; + } + lastaddr = base + newSize; + PR_LOG(_pr_msgc_lm, PR_LOG_ALWAYS, + ("GC: heap now extends from %p to %p", + base, base + newSize)); + return PR_TRUE; +} + + +void _MD_FreeGCSegment(void *base, PRInt32 len) +{ + (void)VirtualFree(base, 0, MEM_RELEASE); +} |