Initial commit of upstream NSPR (4.7.3) and NSS3 (3.12).

third_party/nspr/mozilla/nsprpub/lib/msgc/src/win32gc.c

Index: third_party/nspr/mozilla/nsprpub/lib/msgc/src/win32gc.c
diff --git a/third_party/nspr/mozilla/nsprpub/lib/msgc/src/win32gc.c b/third_party/nspr/mozilla/nsprpub/lib/msgc/src/win32gc.c
new file mode 100644
index 0000000000000000000000000000000000000000..eec83774eb19a9b952191607b1eea70fbe59a26f
--- /dev/null
+++ b/third_party/nspr/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);
+}