diff options
Diffstat (limited to 'libitm/local.cc')
-rw-r--r-- | libitm/local.cc | 70 |
1 files changed, 8 insertions, 62 deletions
diff --git a/libitm/local.cc b/libitm/local.cc index 4f47ff2e5f6..39b6da3a5d2 100644 --- a/libitm/local.cc +++ b/libitm/local.cc @@ -1,4 +1,4 @@ -/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc. +/* Copyright (C) 2008, 2009, 2011, 2012 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU Transactional Memory Library (libitm). @@ -26,29 +26,9 @@ namespace GTM HIDDEN { -struct gtm_undolog_entry -{ - void *addr; - size_t len; - char saved[]; -}; - void -gtm_thread::commit_undolog () -{ - size_t i, n = undolog.size(); - - if (n > 0) - { - for (i = 0; i < n; ++i) - free (undolog[i]); - this->undolog.clear(); - } -} - -void -gtm_thread::rollback_undolog (size_t until_size) +gtm_undolog::rollback (size_t until_size) { size_t i, n = undolog.size(); @@ -56,36 +36,11 @@ gtm_thread::rollback_undolog (size_t until_size) { for (i = n; i-- > until_size; ) { - gtm_undolog_entry *u = *undolog.pop(); - if (u) - { - memcpy (u->addr, u->saved, u->len); - free (u); - } - } - } -} - -/* Forget any references to PTR in the local log. */ - -void -gtm_thread::drop_references_undolog (const void *ptr, size_t len) -{ - size_t i, n = undolog.size(); - - if (n > 0) - { - for (i = n; i > 0; i--) - { - gtm_undolog_entry *u = undolog[i]; - /* ?? Do we need such granularity, or can we get away with - just comparing PTR and LEN. ?? */ - if ((const char *)u->addr >= (const char *)ptr - && ((const char *)u->addr + u->len <= (const char *)ptr + len)) - { - free (u); - undolog[i] = NULL; - } + void *ptr = (void *) undolog[i--]; + size_t len = undolog[i]; + size_t words = (len + sizeof(gtm_word) - 1) / sizeof(gtm_word); + i -= words; + __builtin_memcpy (ptr, &undolog[i], len); } } } @@ -94,16 +49,7 @@ void ITM_REGPARM GTM_LB (const void *ptr, size_t len) { gtm_thread *tx = gtm_thr(); - gtm_undolog_entry *undo; - - undo = (gtm_undolog_entry *) - xmalloc (sizeof (struct gtm_undolog_entry) + len); - undo->addr = (void *) ptr; - undo->len = len; - - tx->undolog.push()[0] = undo; - - memcpy (undo->saved, ptr, len); + tx->undolog.log(ptr, len); } } // namespace GTM |