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gecko/.svn/pristine/0d/0df0fd30f557d58a880614221778ad4a5af482d4.svn-base

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+(* ***** 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 mozilla.org.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corpotation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Takanori Itou <necottie@nesitive.net>
+ *
+ * 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 ***** *)
+unit nsMemory;
+
+interface
+
+uses
+  nsXPCOM;
+
+const
+  NS_MEMORY_CONTRACTID = '@mozilla.org/xpcom/memory-service;1';
+  NS_MEMORY_CLASSNAME = 'Global Memory Service';
+  NS_MEMORY_CID: TGUID = '{30a04e40-38e7-11d4-8cf5-0060b0fc14a3}';
+
+function Alloc(size: Integer): Pointer;
+function Realloc(ptr: Pointer; size: Integer): Pointer;
+function Free(ptr: Pointer): Integer;
+function HeapMinimize(aImmediate: Boolean): Longword;
+function Clone(Ptr: Pointer; size: Longword): Pointer;
+function GetGlobalMemoryService: nsIMemory;
+
+function GlueStartupMemory: Longword;
+procedure GlueShutdownMemory;
+
+procedure SetToMemoryManager;
+
+implementation
+
+uses
+  nsError, nsInit;
+
+var
+  gMemory: nsIMemory;
+
+procedure FreeGlobalMemory;
+begin
+  gMemory := nil;
+end;
+
+function SetupGlobalMemory: nsIMemory;
+begin
+  if Assigned(gMemory) then Exit;
+  nsInit.NS_GetMemoryManager(gMemory);
+  if not Assigned(gMemory) then Exit;
+  Result := gMemory;
+end;
+
+function GlueStartupMemory: Longword;
+begin
+  Result := LongWord(NS_ERROR_FAILURE);
+  if Assigned(gMemory) then Exit;
+  nsInit.NS_GetMemoryManager(gMemory);
+  if not Assigned(gMemory) then Exit;
+  Result := NS_OK;
+end;
+
+procedure GlueShutdownMemory;
+begin
+  gMemory := nil;
+end;
+
+function ENSURE_ALLOCATOR: Boolean;
+begin
+  Result := True;
+  if not Assigned(gMemory) and not Assigned(SetupGlobalMemory()) then
+    Result := False;
+end;
+
+function Alloc(size: Integer): Pointer;
+begin
+  Result := nil;
+  if ENSURE_ALLOCATOR then
+    Result := gMemory.Alloc(size);
+end;
+
+function Realloc(ptr: Pointer; size: Integer): Pointer;
+begin
+  Result := nil;
+  if ENSURE_ALLOCATOR then
+    Result := gMemory.Realloc(ptr, size);
+end;
+
+function Free(ptr: Pointer): Integer;
+begin
+  Result := NS_OK;
+  if ENSURE_ALLOCATOR then gMemory.Free(ptr)
+  else
+    Result := Integer(NS_ERROR_UNEXPECTED);
+end;
+
+function HeapMinimize(aImmediate: Boolean): Longword;
+begin
+  Result := LongWord(NS_ERROR_FAILURE);
+  if ENSURE_ALLOCATOR then
+  try
+    Result := NS_OK;
+    gMemory.HeapMinimize(aImmediate);
+  except
+    Result := LongWord(NS_ERROR_FAILURE);
+  end;
+end;
+
+function Clone(ptr: Pointer; size: Longword): Pointer;
+begin
+  Result := nil;
+  if ENSURE_ALLOCATOR then
+    Result := Clone(Ptr, size);
+end;
+
+function GetGlobalMemoryService: nsIMemory;
+begin
+  Result := nil;
+  if not ENSURE_ALLOCATOR then Exit;
+  Result := gMemory;
+end;
+
+{$IFNDEF FPC}
+const
+  memmgr: TMemoryManager = (
+    GetMem: Alloc;
+    FreeMem: Free;
+    ReallocMem: Realloc;
+  );
+{$ENDIF}
+
+procedure SetToMemoryManager;
+begin
+{$IFNDEF FPC}
+  SetMemoryManager(memmgr);
+{$ENDIF}
+end;
+
+end.