src/share/vm/runtime/threadLocalStorage.hpp

@@ -23,88 +23,28 @@
  */
 
 #ifndef SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP
 #define SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP
 
-#include "gc/shared/gcUtil.hpp"
-#include "runtime/os.hpp"
 #include "utilities/top.hpp"
 
-// Interface for thread local storage
+// forward-decl as we can't have an include cycle
+class Thread;
 
-// 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();
+// Wrapper class for library-based (as opposed to compiler-based)
+// thread-local storage (TLS). All platforms require this for
+// signal-handler based TLS access (which while not strictly async-signal
+// safe in theory, is and has-been for a long time, in practice).
+// Platforms without compiler-based TLS (i.e. __thread storage-class modifier)
+// will use this implementation for all TLS access - see thread.hpp/cpp
 
 class ThreadLocalStorage : AllStatic {
 
  // Exported API
  public:
-  static void    set_thread(Thread* thread);
-  static Thread* get_thread_slow();
-  static void    invalidate_all() { pd_invalidate_all(); }
+  static Thread* thread(); // return current thread, if attached
+  static void    set_thread(Thread* thread); // set current thread
   static void    init();
-  static bool    is_initialized();
-
-  // Machine dependent stuff
-#ifdef TARGET_OS_ARCH_linux_x86
-# include "threadLS_linux_x86.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_linux_sparc
-# include "threadLS_linux_sparc.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_linux_zero
-# include "threadLS_linux_zero.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_solaris_x86
-# include "threadLS_solaris_x86.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_solaris_sparc
-# include "threadLS_solaris_sparc.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_windows_x86
-# include "threadLS_windows_x86.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_linux_arm
-# include "threadLS_linux_arm.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_linux_ppc
-# include "threadLS_linux_ppc.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_linux_aarch64
-# include "threadLS_linux_aarch64.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_aix_ppc
-# include "threadLS_aix_ppc.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_bsd_x86
-# include "threadLS_bsd_x86.hpp"
-#endif
-#ifdef TARGET_OS_ARCH_bsd_zero
-# include "threadLS_bsd_zero.hpp"
-#endif
-
-#ifndef SOLARIS
- public:
-  // Accessor
-  static inline int  thread_index()              { return _thread_index; }
-  static inline void set_thread_index(int index) { _thread_index = index; }
-
- 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();
-
-#endif // SOLARIS
-
-  // Invalidate any thread cacheing or optimization schemes.
-  static void pd_invalidate_all();
-
+  static bool    is_initialized(); // can't use TLS prior to initialization
 };
 
 #endif // SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP