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diff --git a/mozilla/nsprpub/lib/msgc/include/gcint.h b/mozilla/nsprpub/lib/msgc/include/gcint.h
new file mode 100644
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+++ b/mozilla/nsprpub/lib/msgc/include/gcint.h
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+/* -*- 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 ***** */
+
+#ifndef gcint_h___
+#define gcint_h___
+
+#include "prmon.h"
+#include "prgc.h"
+
+extern PRLogModuleInfo *_pr_msgc_lm;
+extern GCInfo _pr_gcData;
+
+#if defined(_WIN32) && !defined(DEBUG)
+#undef INLINE_LOCK
+#endif
+
+#ifdef INLINE_LOCK
+#define LOCK_GC()       EnterCriticalSection(&_pr_gcData.lock->mutexHandle)
+#define UNLOCK_GC()     LeaveCriticalSection(&_pr_gcData.lock->mutexHandle)
+#else
+#define LOCK_GC()       PR_EnterMonitor(_pr_gcData.lock)
+#define UNLOCK_GC()     PR_ExitMonitor (_pr_gcData.lock)
+#define GC_IS_LOCKED()  (PR_GetMonitorEntryCount(_pr_gcData.lock)!=0)
+#endif
+
+#ifdef DEBUG
+#define _GCTRACE(x, y) if (_pr_gcData.flags & x) GCTrace y
+#else
+#define _GCTRACE(x, y)
+#endif
+
+extern GCBeginGCHook *_pr_beginGCHook;
+extern void *_pr_beginGCHookArg;
+extern GCBeginGCHook *_pr_endGCHook;
+extern void *_pr_endGCHookArg;
+
+extern GCBeginFinalizeHook *_pr_beginFinalizeHook;
+extern void *_pr_beginFinalizeHookArg;
+extern GCBeginFinalizeHook *_pr_endFinalizeHook;
+extern void *_pr_endFinalizeHookArg;
+
+extern int _pr_do_a_dump;
+extern FILE *_pr_dump_file;
+
+extern PRLogModuleInfo *_pr_gc_lm;
+
+/*
+** Root finders. Root finders are used by the GC to find pointers into
+** the GC heap that are not contained in the GC heap.
+*/
+typedef struct RootFinderStr RootFinder;
+
+struct RootFinderStr {
+    RootFinder *next;
+    GCRootFinder *func;
+    char *name;
+    void *arg;
+};
+extern RootFinder *_pr_rootFinders;
+
+typedef struct CollectorTypeStr {
+    GCType gctype;
+    PRUint32 flags;
+} CollectorType;
+
+#define GC_MAX_TYPES	256
+extern CollectorType *_pr_collectorTypes;
+
+#define _GC_TYPE_BUSY   0x1
+#define _GC_TYPE_FINAL  0x2
+#define _GC_TYPE_WEAK   0x4
+
+/* Slot in _pr_gcTypes used for free memory */
+#define FREE_MEMORY_TYPEIX 255
+
+extern void _PR_InitGC(PRWord flags);
+extern void _MD_InitGC(void);
+extern void PR_CALLBACK _PR_ScanFinalQueue(void *notused);
+
+/*
+** Grow the GC Heap.
+*/
+extern void *_MD_GrowGCHeap(PRUint32 *sizep);
+
+/*
+** Extend the GC Heap.
+*/
+extern PRBool _MD_ExtendGCHeap(char *base, PRInt32 oldSize, PRInt32 newSize);
+
+/*
+** Free a GC segment.
+*/
+extern void _MD_FreeGCSegment(void *base, PRInt32 len);
+
+#endif /* gcint_h___ */