Fix kcp transmission error

src/ringbuffer/ringbuffer.h

@@ -0,0 +1,101 @@
+#ifndef _RINGBUFFER_H_
+#define _RINGBUFFER_H_
+
+#include <string.h>
+
+class RingBuffer {
+ public:
+  class Data {
+   public:
+    Data() = default;
+
+    Data(const char* data, size_t size) {
+      data_ = new char[size];
+      memcpy(data_, data, size);
+      size_ = size;
+    }
+
+    Data(const Data& obj) {
+      data_ = new char[obj.size_];
+      memcpy(data_, obj.data_, obj.size_);
+      size_ = obj.size_;
+    }
+
+    Data& operator=(const Data& obj) {
+      data_ = new char[obj.size_];
+      memcpy(data_, obj.data_, obj.size_);
+      size_ = obj.size_;
+      return *this;
+    }
+
+    ~Data() {
+      if (data_) {
+        delete data_;
+        data_ = nullptr;
+      }
+      size_ = 0;
+    }
+
+    size_t size() const { return size_; }
+    char* data() const { return data_; }
+
+   public:
+    char* data_ = nullptr;
+    size_t size_ = 0;
+  };
+
+ public:
+  RingBuffer(unsigned size = 128) : m_size(size), m_front(0), m_rear(0) {
+    m_data = new Data[size];
+  }
+
+  ~RingBuffer() {
+    delete[] m_data;
+    m_data = nullptr;
+  }
+
+  inline bool isEmpty() const { return m_front == m_rear; }
+
+  inline bool isFull() const { return m_front == (m_rear + 1) % m_size; }
+
+  bool push(const Data& value) {
+    if (isFull()) {
+      return false;
+    }
+    m_data[m_rear] = value;
+    m_rear = (m_rear + 1) % m_size;
+    return true;
+  }
+
+  bool push(const Data* value) {
+    if (isFull()) {
+      return false;
+    }
+    m_data[m_rear] = *value;
+    m_rear = (m_rear + 1) % m_size;
+    return true;
+  }
+
+  inline bool pop(Data& value) {
+    if (isEmpty()) {
+      return false;
+    }
+    value = m_data[m_front];
+    m_front = (m_front + 1) % m_size;
+    return true;
+  }
+
+  inline unsigned int front() const { return m_front; }
+
+  inline unsigned int rear() const { return m_rear; }
+
+  inline unsigned int size() const { return m_size; }
+
+ private:
+  unsigned int m_size;
+  int m_front;
+  int m_rear;
+  Data* m_data;
+};
+
+#endif