diff options
author | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
---|---|---|
committer | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
commit | d8543bb6618c17b12da906afa77d216f58cf4058 (patch) | |
tree | c58dc05ed86825bd0ef8d305d58c8205106b540f /JavaScriptCore/wtf/OwnArrayPtr.h | |
download | external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.zip external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.gz external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.bz2 |
external/webkit r30707
Diffstat (limited to 'JavaScriptCore/wtf/OwnArrayPtr.h')
-rw-r--r-- | JavaScriptCore/wtf/OwnArrayPtr.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/OwnArrayPtr.h b/JavaScriptCore/wtf/OwnArrayPtr.h new file mode 100644 index 0000000..2b6c7dc --- /dev/null +++ b/JavaScriptCore/wtf/OwnArrayPtr.h @@ -0,0 +1,72 @@ +// -*- mode: c++; c-basic-offset: 4 -*- +/* + * Copyright (C) 2006 Apple Computer, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#ifndef WTF_OwnArrayPtr_h +#define WTF_OwnArrayPtr_h + +#include <algorithm> +#include <wtf/Assertions.h> +#include <wtf/Noncopyable.h> + +namespace WTF { + + template <typename T> class OwnArrayPtr : Noncopyable { + public: + explicit OwnArrayPtr(T* ptr = 0) : m_ptr(ptr) { } + ~OwnArrayPtr() { safeDelete(); } + + T* get() const { return m_ptr; } + T* release() { T* ptr = m_ptr; m_ptr = 0; return ptr; } + + void set(T* ptr) { ASSERT(m_ptr != ptr); safeDelete(); m_ptr = ptr; } + void clear() { safeDelete(); m_ptr = 0; } + + T& operator*() const { ASSERT(m_ptr); return *m_ptr; } + T* operator->() const { ASSERT(m_ptr); return m_ptr; } + + T& operator[](std::ptrdiff_t i) const { ASSERT(m_ptr); ASSERT(i >= 0); return m_ptr[i]; } + + bool operator!() const { return !m_ptr; } + + // This conversion operator allows implicit conversion to bool but not to other integer types. + typedef T* OwnArrayPtr::*UnspecifiedBoolType; + operator UnspecifiedBoolType() const { return m_ptr ? &OwnArrayPtr::m_ptr : 0; } + + void swap(OwnArrayPtr& o) { std::swap(m_ptr, o.m_ptr); } + + private: + void safeDelete() { typedef char known[sizeof(T) ? 1 : -1]; if (sizeof(known)) delete [] m_ptr; } + + T* m_ptr; + }; + + template <typename T> inline void swap(OwnArrayPtr<T>& a, OwnArrayPtr<T>& b) { a.swap(b); } + + template <typename T> inline T* getPtr(const OwnArrayPtr<T>& p) + { + return p.get(); + } + +} // namespace WTF + +using WTF::OwnArrayPtr; + +#endif // WTF_OwnArrayPtr_h |