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/*
* libADLMIDI is a free Software MIDI synthesizer library with OPL3 emulation
*
* Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
* ADLMIDI Library API: Copyright (c) 2015-2025 Vitaly Novichkov <admin@wohlnet.ru>
*
* Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation:
* http://iki.fi/bisqwit/source/adlmidi.html
*
* This program 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
* any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ADLMIDI_PTR_HPP_THING
#define ADLMIDI_PTR_HPP_THING
#include <algorithm> // swap
#include <stddef.h>
#include <stdlib.h>
/*
Generic deleters for smart pointers
*/
template <class T>
struct ADLMIDI_DefaultDelete
{
void operator()(T *x) { delete x; }
};
template <class T>
struct ADLMIDI_DefaultArrayDelete
{
void operator()(T *x) { delete[] x; }
};
struct ADLMIDI_CDelete
{
void operator()(void *x) { free(x); }
};
/*
Safe unique pointer for C++98, non-copyable but swappable.
*/
template< class T, class Deleter = ADLMIDI_DefaultDelete<T> >
class AdlMIDI_UPtr
{
T *m_p;
public:
explicit AdlMIDI_UPtr(T *p = NULL)
: m_p(p) {}
~AdlMIDI_UPtr()
{
reset();
}
void reset(T *p = NULL)
{
if(p != m_p) {
if(m_p) {
Deleter del;
del(m_p);
}
m_p = p;
}
}
void swap(AdlMIDI_UPtr &other)
{
std::swap(m_p, other.m_p);
}
T *get() const
{
return m_p;
}
T &operator*() const
{
return *m_p;
}
T *operator->() const
{
return m_p;
}
T &operator[](size_t index) const
{
return m_p[index];
}
private:
AdlMIDI_UPtr(const AdlMIDI_UPtr &);
AdlMIDI_UPtr &operator=(const AdlMIDI_UPtr &);
};
template <class T>
void swap(AdlMIDI_UPtr<T> &a, AdlMIDI_UPtr<T> &b)
{
a.swap(b);
}
/**
Unique pointer for arrays.
*/
template<class T>
class AdlMIDI_UPtrArray :
public AdlMIDI_UPtr< T, ADLMIDI_DefaultArrayDelete<T> >
{
public:
explicit AdlMIDI_UPtrArray(T *p = NULL)
: AdlMIDI_UPtr< T, ADLMIDI_DefaultArrayDelete<T> >(p) {}
};
/**
Unique pointer for C memory.
*/
template<class T>
class AdlMIDI_CPtr :
public AdlMIDI_UPtr< T, ADLMIDI_CDelete >
{
public:
explicit AdlMIDI_CPtr(T *p = NULL)
: AdlMIDI_UPtr< T, ADLMIDI_CDelete >(p) {}
};
/*
Shared pointer with non-atomic counter
FAQ: Why not std::shared_ptr? Because of Android NDK now doesn't supports it
*/
template< class T, class Deleter = ADLMIDI_DefaultDelete<T> >
class AdlMIDI_SPtr
{
T *m_p;
size_t *m_counter;
public:
explicit AdlMIDI_SPtr(T *p = NULL)
: m_p(p), m_counter(p ? new size_t(1) : NULL) {}
~AdlMIDI_SPtr()
{
reset(NULL);
}
AdlMIDI_SPtr(const AdlMIDI_SPtr &other)
: m_p(other.m_p), m_counter(other.m_counter)
{
if(m_counter)
++*m_counter;
}
AdlMIDI_SPtr &operator=(const AdlMIDI_SPtr &other)
{
if(this == &other)
return *this;
reset();
m_p = other.m_p;
m_counter = other.m_counter;
if(m_counter)
++*m_counter;
return *this;
}
void reset(T *p = NULL)
{
if(p != m_p) {
if(m_p && --*m_counter == 0) {
Deleter del;
del(m_p);
if(!p) {
delete m_counter;
m_counter = NULL;
}
}
m_p = p;
if(p) {
if(!m_counter)
m_counter = new size_t;
*m_counter = 1;
}
}
}
T *get() const
{
return m_p;
}
T &operator*() const
{
return *m_p;
}
T *operator->() const
{
return m_p;
}
T &operator[](size_t index) const
{
return m_p[index];
}
};
/**
Shared pointer for arrays.
*/
template<class T>
class AdlMIDI_SPtrArray :
public AdlMIDI_SPtr< T, ADLMIDI_DefaultArrayDelete<T> >
{
public:
explicit AdlMIDI_SPtrArray(T *p = NULL)
: AdlMIDI_SPtr< T, ADLMIDI_DefaultArrayDelete<T> >(p) {}
};
#endif //ADLMIDI_PTR_HPP_THING
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