Update copyright in libitm.

[thirdparty/gcc.git] / libitm / libitm_i.h

diff --git a/libitm/libitm_i.h b/libitm/libitm_i.h
index ba1afb4710c8ff073d834bcc419d22a854e410f8..421b349cfe53239a749fa1fb033a88d082b206ec 100644 (file)
--- a/libitm/libitm_i.h
+++ b/libitm/libitm_i.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2008-2013 Free Software Foundation, Inc.
    Contributed by Richard Henderson <rth@redhat.com>.
 
    This file is part of the GNU Transactional Memory Library (libitm).
@@ -37,6 +37,11 @@
 #include <string.h>
 #include <unwind.h>
 #include "local_type_traits"
+#include "local_atomic"
+
+/* Don't require libgcc_s.so for exceptions.  */
+extern void _Unwind_DeleteException (_Unwind_Exception*) __attribute__((weak));
+
 
 #include "common.h"
 
@@ -92,9 +97,6 @@ struct gtm_alloc_action
   bool allocated;
 };
 
-// This type is private to local.c.
-struct gtm_undolog_entry;
-
 struct gtm_thread;
 
 // A transaction checkpoint: data that has to saved and restored when doing
@@ -120,6 +122,36 @@ struct gtm_transaction_cp
   void commit(gtm_thread* tx);
 };
 
+// An undo log for writes.
+struct gtm_undolog
+{
+  vector<gtm_word> undolog;
+
+  // Log the previous value at a certain address.
+  // The easiest way to inline this is to just define this here.
+  void log(const void *ptr, size_t len)
+  {
+    size_t words = (len + sizeof(gtm_word) - 1) / sizeof(gtm_word);
+    gtm_word *undo = undolog.push(words + 2);
+    memcpy(undo, ptr, len);
+    undo[words] = len;
+    undo[words + 1] = (gtm_word) ptr;
+  }
+
+  void commit () { undolog.clear(); }
+  size_t size() const { return undolog.size(); }
+
+  // In local.cc
+  void rollback (gtm_thread* tx, size_t until_size = 0);
+};
+
+// An entry of a read or write log.  Used by multi-lock TM methods.
+struct gtm_rwlog_entry
+{
+  atomic<gtm_word> *orec;
+  gtm_word value;
+};
+
 // Contains all thread-specific data required by the entire library.
 // This includes all data relevant to a single transaction. Because most
 // thread-specific data is about the current transaction, we also refer to
@@ -147,7 +179,11 @@ struct gtm_thread
   gtm_jmpbuf jb;
 
   // Data used by local.c for the undo log for both local and shared memory.
-  vector<gtm_undolog_entry*> undolog;
+  gtm_undolog undolog;
+
+  // Read and write logs.  Used by multi-lock TM methods.
+  vector<gtm_rwlog_entry> readlog;
+  vector<gtm_rwlog_entry> writelog;
 
   // Data used by alloc.c for the malloc/free undo log.
   aa_tree<uintptr_t, gtm_alloc_action> alloc_actions;
@@ -206,7 +242,7 @@ struct gtm_thread
 
   // If this transaction is inactive, shared_state is ~0. Otherwise, this is
   // an active or serial transaction.
-  gtm_word shared_state;
+  atomic<gtm_word> shared_state;
 
   // The lock that provides access to serial mode.  Non-serialized
   // transactions acquire read locks; a serialized transaction aquires
@@ -230,7 +266,8 @@ struct gtm_thread
   // In beginend.cc
   void rollback (gtm_transaction_cp *cp = 0, bool aborting = false);
   bool trycommit ();
-  void restart (gtm_restart_reason) ITM_NORETURN;
+  void restart (gtm_restart_reason, bool finish_serial_upgrade = false)
+        ITM_NORETURN;
 
   gtm_thread();
   ~gtm_thread();
@@ -252,11 +289,6 @@ struct gtm_thread
   // In eh_cpp.cc
   void revert_cpp_exceptions (gtm_transaction_cp *cp = 0);
 
-  // In local.cc
-  void commit_undolog (void);
-  void rollback_undolog (size_t until_size = 0);
-  void drop_references_undolog (const void *, size_t);
-
   // In retry.cc
   // Must be called outside of transactions (i.e., after rollback).
   void decide_retry_strategy (gtm_restart_reason);
@@ -285,7 +317,7 @@ namespace GTM HIDDEN {
 // are used.
 extern uint64_t gtm_spin_count_var;
 
-extern "C" uint32_t GTM_longjmp (const gtm_jmpbuf *, uint32_t, uint32_t)
+extern "C" uint32_t GTM_longjmp (uint32_t, const gtm_jmpbuf *, uint32_t)
        ITM_NORETURN ITM_REGPARM;
 
 extern "C" void GTM_LB (const void *, size_t) ITM_REGPARM;
@@ -299,9 +331,15 @@ extern abi_dispatch *dispatch_serial();
 extern abi_dispatch *dispatch_serialirr();
 extern abi_dispatch *dispatch_serialirr_onwrite();
 extern abi_dispatch *dispatch_gl_wt();
+extern abi_dispatch *dispatch_ml_wt();
+extern abi_dispatch *dispatch_htm();
 
 extern gtm_cacheline_mask gtm_mask_stack(gtm_cacheline *, gtm_cacheline_mask);
 
+// Control variable for the HTM fastpath that uses serial mode as fallback.
+// Non-zero if the HTM fastpath is enabled. See gtm_thread::begin_transaction.
+extern uint32_t htm_fastpath;
+
 } // namespace GTM
 
 #endif // LIBITM_I_H