Move smart pointer classes into separated header

1 files changed, 195 insertions, 0 deletions

diff --git a/src/adlmidi_ptr.hpp b/src/adlmidi_ptr.hpp
new file mode 100644
index 0000000..bd2b8fb
--- /dev/null
+++ b/src/adlmidi_ptr.hpp
@@ -0,0 +1,195 @@
+/*
+ * 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;
+    }
+};
+
+/*
+    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 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)
+                delete 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()
+    {
+        return m_p;
+    }
+    VALUE &operator*()
+    {
+        return *m_p;
+    }
+    VALUE *operator->()
+    {
+        return m_p;
+    }
+};
+
+#endif //ADLMIDI_PTR_HPP_THING