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hotspot/src/share/vm/runtime/threadLocalStorage.hpp

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+/*
+ * Copyright 1997-2003 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.
+ *
+ */
+
+// Interface for thread local storage
+
+// Fast variant of ThreadLocalStorage::get_thread_slow
+extern "C" Thread*   get_thread();
+
+// Get raw thread id: e.g., %g7 on sparc, fs or gs on x86
+extern "C" uintptr_t _raw_thread_id();
+
+class ThreadLocalStorage : AllStatic {
+ public:
+  static void    set_thread(Thread* thread);
+  static Thread* get_thread_slow();
+  static void    invalidate_all() { pd_invalidate_all(); }
+
+  // Machine dependent stuff
+  #include "incls/_threadLS_pd.hpp.incl"
+
+ public:
+  // Accessor
+  static inline int  thread_index()              { return _thread_index; }
+  static inline void set_thread_index(int index) { _thread_index = index; }
+
+  // Initialization
+  // Called explicitly from VMThread::activate_system instead of init_globals.
+  static void init();
+
+ private:
+  static int     _thread_index;
+
+  static void    generate_code_for_get_thread();
+
+  // Processor dependent parts of set_thread and initialization
+  static void pd_set_thread(Thread* thread);
+  static void pd_init();
+  // Invalidate any thread cacheing or optimization schemes.
+  static void pd_invalidate_all();
+
+};