--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/compiler/abstractCompiler.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,82 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+typedef void (*initializer)(void);
+
+class AbstractCompiler : public CHeapObj {
+ private:
+  bool _is_initialized; // Mark whether compiler object is initialized
+
+ protected:
+  // Used for tracking global state of compiler runtime initialization
+  enum { uninitialized, initializing, initialized };
+
+  // This method will call the initialization method "f" once (per compiler class/subclass)
+  // and do so without holding any locks
+  void initialize_runtimes(initializer f, volatile int* state);
+
+ public:
+  AbstractCompiler() : _is_initialized(false)    {}
+
+  // Name of this compiler
+  virtual const char* name() = 0;
+
+  // Missing feature tests
+  virtual bool supports_native()                 { return true; }
+  virtual bool supports_osr   ()                 { return true; }
+#if defined(TIERED) || ( !defined(COMPILER1) && !defined(COMPILER2))
+  virtual bool is_c1   ()                        { return false; }
+  virtual bool is_c2   ()                        { return false; }
+#else
+#ifdef COMPILER1
+  bool is_c1   ()                                { return true; }
+  bool is_c2   ()                                { return false; }
+#endif // COMPILER1
+#ifdef COMPILER2
+  bool is_c1   ()                                { return false; }
+  bool is_c2   ()                                { return true; }
+#endif // COMPILER2
+#endif // TIERED
+
+  // Customization
+  virtual bool needs_stubs            ()         = 0;
+
+  void mark_initialized()                        { _is_initialized = true; }
+  bool is_initialized()                          { return _is_initialized; }
+
+  virtual void initialize()                      = 0;
+
+  // Compilation entry point for methods
+  virtual void compile_method(ciEnv* env,
+                              ciMethod* target,
+                              int entry_bci) {
+    ShouldNotReachHere();
+  }
+
+
+  // Print compilation timers and statistics
+  virtual void print_timers() {
+    ShouldNotReachHere();
+  }
+};