Merge from transactional-memory branch.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181154 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 108 insertions, 0 deletions

diff --git a/libitm/containers.h b/libitm/containers.h
new file mode 100644
index 00000000000..e8aa94bb4f4
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+++ b/libitm/containers.h
@@ -0,0 +1,108 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   Contributed by Torvald Riegel <triegel@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   Libitm 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 for
+   more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef LIBITM_CONTAINERS_H
+#define LIBITM_CONTAINERS_H 1
+
+#include "common.h"
+
+namespace GTM HIDDEN {
+
+// A simple vector-like container.
+// If alloc_seperate_cl is true, allocations will happen on separate cache
+// lines.
+template <typename T, bool alloc_separate_cl = true>
+class vector
+{
+ private:
+  size_t m_capacity;
+  size_t m_size;
+  T* entries;
+
+  // Initial capacity of the vector.
+  static const size_t default_initial_capacity = 32;
+  // Above that capacity, grow vector by that size for each call.
+  static const size_t default_resize_max = 2048;
+  // Resize vector to at least this capacity.
+  static const size_t default_resize_min = 32;
+
+  // Don't try to copy this vector.
+  vector<T, alloc_separate_cl>(const vector<T, alloc_separate_cl>& x);
+
+ public:
+  typedef T datatype;
+  typedef T* iterator;
+
+  iterator begin() const { return entries; }
+  iterator end() const { return entries + m_size; }
+  T& operator[] (size_t pos) { return entries[pos]; }
+  const T& operator[] (size_t pos) const  { return entries[pos]; }
+
+  vector<T, alloc_separate_cl>(size_t initial_size = default_initial_capacity)
+    : m_capacity(initial_size),
+      m_size(0)
+  {
+    if (m_capacity > 0)
+      entries = (T*) xmalloc(sizeof(T) * m_capacity, alloc_separate_cl);
+    else
+      entries = 0;
+  }
+  ~vector<T, alloc_separate_cl>() { if (m_capacity) free(entries); }
+
+  void resize()
+  {
+    if (m_capacity >= default_resize_max)
+      m_capacity = m_capacity + default_resize_max;
+    else
+      m_capacity = m_capacity * 2;
+    if (m_capacity < default_resize_min)
+      m_capacity = default_resize_min;
+    entries = (T*) xrealloc(entries, sizeof(T) * m_capacity, alloc_separate_cl);
+  }
+  void resize_noinline() __attribute__((noinline)) { resize(); }
+
+  size_t size() const { return m_size; }
+  size_t capacity() const { return this->capacity; }
+
+  void clear() { m_size = 0; }
+
+  iterator push() {
+    // We don't want inlining here since push() is often on the fast path.
+    if (unlikely(m_size == m_capacity)) resize_noinline();
+    return &entries[m_size++];
+  }
+
+  iterator pop() {
+    if (likely(m_size > 0))
+      {
+	m_size--;
+	return entries + m_size;
+      }
+    else return 0;
+  }
+};
+
+} // namespace GTM
+
+#endif // LIBITM_CONTAINERS_H