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/*
* Copyright (C) 2014 Igalia S.L.
*
* 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 GUniquePtr_h
#define GUniquePtr_h
#if USE(GLIB)
#include <gio/gio.h>
#include <utility>
#include <wtf/Noncopyable.h>
namespace WTF {
template<typename T>
struct GPtrDeleter {
void operator()(T* ptr) const { g_free(ptr); }
};
template<typename T>
struct GFreeDeleter {
void operator()(T* ptr) const { g_free(ptr); }
};
template<typename T, typename U = GPtrDeleter<T>>
using GUniquePtr = std::unique_ptr<T, U>;
#define FOR_EACH_GLIB_DELETER(macro) \
macro(GError, g_error_free) \
macro(GList, g_list_free) \
macro(GSList, g_slist_free) \
macro(GPatternSpec, g_pattern_spec_free) \
macro(GDir, g_dir_close) \
macro(GTimer, g_timer_destroy) \
macro(GKeyFile, g_key_file_free) \
macro(char*, g_strfreev) \
macro(GVariantIter, g_variant_iter_free) \
macro(GVariantType, g_variant_type_free) \
macro(GMarkupParseContext, g_markup_parse_context_free)
#define WTF_DEFINE_GPTR_DELETER(typeName, deleterFunc) \
template<> struct GPtrDeleter<typeName> \
{ \
void operator() (typeName* ptr) const \
{ \
deleterFunc(ptr); \
} \
};
FOR_EACH_GLIB_DELETER(WTF_DEFINE_GPTR_DELETER)
#undef FOR_EACH_GLIB_DELETER
#define WTF_DEFINE_DEPRECATED_GPTR_DELETER(typeName, deleterFunc) \
template<> struct GPtrDeleter<typeName> { \
void operator()(typeName* ptr) const \
{ \
ALLOW_DEPRECATED_DECLARATIONS_BEGIN; \
deleterFunc(ptr); \
ALLOW_DEPRECATED_DECLARATIONS_END; \
} \
};
WTF_DEFINE_DEPRECATED_GPTR_DELETER(GValueArray, g_value_array_free)
#undef WTF_DEFINE_DEPRECATED_GPTR_DELETER
template <typename T> class GUniqueOutPtr {
WTF_MAKE_NONCOPYABLE(GUniqueOutPtr);
public:
GUniqueOutPtr()
: m_ptr(nullptr)
{
}
~GUniqueOutPtr()
{
reset();
}
T*& outPtr()
{
reset();
return m_ptr;
}
T* release()
{
return std::exchange(m_ptr, nullptr);
}
T& operator*() const
{
ASSERT(m_ptr);
return *m_ptr;
}
T* operator->() const
{
ASSERT(m_ptr);
return m_ptr;
}
T* get() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
// This conversion operator allows implicit conversion to bool but not to other integer types.
typedef T* GUniqueOutPtr::*UnspecifiedBoolType;
operator UnspecifiedBoolType() const { return m_ptr ? &GUniqueOutPtr::m_ptr : 0; }
private:
void reset()
{
if (m_ptr) {
GUniquePtr<T> deletePtr(m_ptr);
m_ptr = nullptr;
}
}
T* m_ptr;
};
} // namespace WTF
using WTF::GUniquePtr;
using WTF::GUniqueOutPtr;
using WTF::GFreeDeleter;
#endif // USE(GLIB)
#endif // GUniquePtr_h
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