Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 103 insertions, 0 deletions

diff --git a/storage/tokudb/PerconaFT/util/scoped_malloc.h b/storage/tokudb/PerconaFT/util/scoped_malloc.h
new file mode 100644
index 00000000..b95b687a
--- /dev/null
+++ b/storage/tokudb/PerconaFT/util/scoped_malloc.h
@@ -0,0 +1,103 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*======
+This file is part of PerconaFT.
+
+
+Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License, version 2,
+    as published by the Free Software Foundation.
+
+    PerconaFT 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.
+
+    You should have received a copy of the GNU General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License, version 3,
+    as published by the Free Software Foundation.
+
+    PerconaFT 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 Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+======= */
+
+#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
+
+#pragma once
+
+#include <string.h>
+
+namespace toku {
+
+    class scoped_malloc {
+    public:
+        // Memory is allocated from thread-local storage if available, otherwise from malloc(3).
+        scoped_malloc(const size_t size);
+
+        ~scoped_malloc();
+
+        void *get() const {
+            return m_buf;
+        }
+
+    private:
+        // Non-copyable
+        scoped_malloc();
+
+        const size_t m_size;
+        const bool m_local;
+        void *const m_buf;
+    };
+
+    class scoped_calloc : public scoped_malloc {
+    public:
+        // A scoped malloc whose bytes are initialized to zero, as in calloc(3)
+        scoped_calloc(const size_t size) :
+            scoped_malloc(size) {
+            memset(scoped_malloc::get(), 0, size);
+        }
+    };
+
+    class scoped_malloc_aligned : public scoped_malloc {
+    public:
+        scoped_malloc_aligned(const size_t size, const size_t alignment) :
+            scoped_malloc(size + alignment) {
+            invariant(size >= alignment);
+            invariant(alignment > 0);
+            const uintptr_t addr = reinterpret_cast<uintptr_t>(scoped_malloc::get());
+            const uintptr_t aligned_addr = (addr + alignment) - (addr % alignment);
+            invariant(aligned_addr < addr + size + alignment);
+            m_aligned_buf = reinterpret_cast<char *>(aligned_addr);
+        }
+
+        void *get() const {
+            return m_aligned_buf;
+        }
+
+    private:
+        void *m_aligned_buf;
+    };
+
+} // namespace toku
+
+void toku_scoped_malloc_init(void);
+
+void toku_scoped_malloc_destroy(void);
+
+void toku_scoped_malloc_destroy_set(void);
+
+void toku_scoped_malloc_destroy_key(void);
+