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1 files changed, 48 insertions, 0 deletions

diff --git a/goo/gmempp.h b/goo/gmempp.h
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+//========================================================================
+//
+// gmempp.h
+//
+// Redefine the new and delete operators to call the debugging malloc.
+//
+// This is a hack: some libraries (Qt) allocate global objects and
+// never free them, so this file #define's new to have an argument, so
+// that we can differentiate our new calls from external library new
+// calls.  Calls from external libraries will not be counted when
+// un-freed memory is listed.  There's no guarantee that this will
+// work in all cases: if some external library also defines a new
+// operator that takes the same extra argument, things will break
+// horribly.
+//
+// This entire .h file is wrapped in '#ifdef DEBUG_MEM'.  I.e., if you
+// don't define DEBUG_MEM, this hack goes away and can't cause any
+// problems.  Do not define DEBUG_MEM in production code.
+//
+// To use this .h file, it must be #included *after* all system
+// includes.  Calls to new in any modules that do not include this .h
+// file will not be counted as un-freed memory.
+//
+//========================================================================
+
+#ifndef GMEMPP_H
+#define GMEMPP_H
+
+#ifdef DEBUG_MEM
+
+#include <stdlib.h>
+
+extern void *operator new(size_t size, int dummy);
+extern void *operator new[](size_t size, int dummy);
+
+// These have to be defined (and declared) to avoid a compiler warning
+// with Visual Studio.
+extern void operator delete(void *p, int dummy);
+extern void operator delete[](void *p, int dummy);
+
+// This transforms 'new Foo(...)' into 'new (1) Foo(...)', which
+// forces a call to the operator new variant with the 'int dummy' arg.
+#define debug_new new (1)
+#define new debug_new
+
+#endif // DEBUG_MEM
+
+#endif // GMEMPP_H