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/*
* libADLMIDI is a free MIDI to WAV conversion library with OPL3 emulation
*
* Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
* ADLMIDI Library API: Copyright (c) 2015-2018 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
/*
Smart pointer for C heaps, created with malloc() call.
FAQ: Why not std::shared_ptr? Because of Android NDK now doesn't supports it
*/
template<class PTR>
class AdlMIDI_CPtr
{
PTR *m_p;
public:
AdlMIDI_CPtr() : m_p(NULL) {}
~AdlMIDI_CPtr()
{
reset(NULL);
}
void reset(PTR *p = NULL)
{
if(p != m_p) {
if(m_p)
free(m_p);
m_p = p;
}
}
PTR *get()
{
return m_p;
}
PTR &operator*()
{
return *m_p;
}
PTR *operator->()
{
return m_p;
}
private:
AdlMIDI_CPtr(const AdlMIDI_CPtr &);
AdlMIDI_CPtr &operator=(const AdlMIDI_CPtr &);
};
template<class PTR>
class AdlMIDI_NArrPtr
{
PTR *m_p;
public:
AdlMIDI_NArrPtr() : m_p(NULL) {}
AdlMIDI_NArrPtr(PTR *value)
{
reset(value);
}
~AdlMIDI_NArrPtr()
{
reset(NULL);
}
void reset(PTR *p = NULL)
{
if(p != m_p) {
if(m_p)
delete [] m_p;
m_p = p;
}
}
PTR *get()
{
return m_p;
}
PTR &operator*()
{
return *m_p;
}
PTR *operator->()
{
return m_p;
}
PTR operator[](size_t index)
{
return m_p[index];
}
const PTR operator[](size_t index) const
{
return m_p[index];
}
AdlMIDI_NArrPtr(AdlMIDI_NArrPtr &other)
{
m_p = other.m_p;
other.m_p = NULL;
}
AdlMIDI_NArrPtr &operator=(AdlMIDI_NArrPtr &other)
{
m_p = other.m_p;
other.m_p = NULL;
return m_p;
}
};
/*
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; }
};
/*
Shared pointer with non-atomic counter
FAQ: Why not std::shared_ptr? Because of Android NDK now doesn't supports it
*/
template< class VALUE, class DELETER = ADLMIDI_DefaultDelete<VALUE> >
class AdlMIDI_SPtr
{
VALUE *m_p;
size_t *m_counter;
public:
AdlMIDI_SPtr() : m_p(NULL), m_counter(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(VALUE *p = NULL)
{
if(p != m_p) {
if(m_p && --*m_counter == 0) {
DELETER del;
del(m_p);
}
m_p = p;
if(!p) {
if(m_counter) {
delete m_counter;
m_counter = NULL;
}
}
else
{
if(!m_counter)
m_counter = new size_t;
*m_counter = 1;
}
}
}
VALUE *get() const
{
return m_p;
}
VALUE &operator*()
{
return *m_p;
}
const VALUE &operator*() const
{
return *m_p;
}
VALUE *operator->() const
{
return m_p;
}
};
template<class VALUE>
class AdlMIDI_SPtrArray :
public AdlMIDI_SPtr< VALUE, ADLMIDI_DefaultArrayDelete<VALUE> >
{
};
#endif //ADLMIDI_PTR_HPP_THING
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