130 lines
3.0 KiB
C++
130 lines
3.0 KiB
C++
/*
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* Copyright (C) 2014 Igalia S.L.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GUniquePtr_h
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#define GUniquePtr_h
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#if USE(GLIB)
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#include <gio/gio.h>
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#include <utility>
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#include <wtf/Noncopyable.h>
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namespace WTF {
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template<typename T>
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struct GPtrDeleter {
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void operator()(T* ptr) const { g_free(ptr); }
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};
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template<typename T>
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using GUniquePtr = std::unique_ptr<T, GPtrDeleter<T>>;
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#define FOR_EACH_GLIB_DELETER(macro) \
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macro(GError, g_error_free) \
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macro(GList, g_list_free) \
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macro(GSList, g_slist_free) \
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macro(GPatternSpec, g_pattern_spec_free) \
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macro(GDir, g_dir_close) \
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macro(GTimer, g_timer_destroy) \
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macro(GKeyFile, g_key_file_free) \
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macro(char*, g_strfreev) \
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macro(GVariantIter, g_variant_iter_free) \
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macro(GVariantType, g_variant_type_free) \
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macro(GMarkupParseContext, g_markup_parse_context_free)
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#define WTF_DEFINE_GPTR_DELETER(typeName, deleterFunc) \
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template<> struct GPtrDeleter<typeName> \
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{ \
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void operator() (typeName* ptr) const \
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{ \
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deleterFunc(ptr); \
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} \
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};
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FOR_EACH_GLIB_DELETER(WTF_DEFINE_GPTR_DELETER)
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#undef FOR_EACH_GLIB_DELETER
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template <typename T> class GUniqueOutPtr {
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WTF_MAKE_NONCOPYABLE(GUniqueOutPtr);
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public:
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GUniqueOutPtr()
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: m_ptr(nullptr)
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{
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}
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~GUniqueOutPtr()
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{
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reset();
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}
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T*& outPtr()
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{
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reset();
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return m_ptr;
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}
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T* release()
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{
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return std::exchange(m_ptr, nullptr);
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}
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T& operator*() const
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{
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ASSERT(m_ptr);
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return *m_ptr;
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}
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T* operator->() const
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{
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ASSERT(m_ptr);
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return m_ptr;
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}
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T* get() const { return m_ptr; }
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bool operator!() const { return !m_ptr; }
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// This conversion operator allows implicit conversion to bool but not to other integer types.
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typedef T* GUniqueOutPtr::*UnspecifiedBoolType;
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operator UnspecifiedBoolType() const { return m_ptr ? &GUniqueOutPtr::m_ptr : 0; }
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private:
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void reset()
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{
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if (m_ptr) {
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GUniquePtr<T> deletePtr(m_ptr);
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m_ptr = nullptr;
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}
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}
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T* m_ptr;
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};
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} // namespace WTF
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using WTF::GUniquePtr;
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using WTF::GUniqueOutPtr;
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#endif // USE(GLIB)
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#endif // GUniquePtr_h
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