Textractor/vnr/texthook/host/textthread_p.h

#pragma once
// textthread_p.h
// 8/14/2013 jichi
// Branch: ITH/main_template.h, rev 66

#include <windows.h>

template <typename T>
void Release(const T &p) { delete p; }

// Prevent memory release.
// Used when T is basic types and will be automatically released (on stack).
#define MK_BASIC_TYPE(T) \
  template<> \
  void Release<T>(const T &p) {}

template<class T>
struct BinaryEqual {
  bool operator ()(const T &a, const T &b, DWORD) { return a == b; }
};

template<class T, int default_size, class fComp=BinaryEqual<T> >
class MyVector
{
public:
	int Used() const { return used; }
	T *Storage() const { return storage; }
	void LockVector() { EnterCriticalSection(&cs_store); }
	void UnlockVector() { LeaveCriticalSection(&cs_store); }
  MyVector() : size(default_size), used(0)
  {
    InitializeCriticalSection(&cs_store);
    storage = new T[size];
    // jichi 9/21/2013: zero memory
    // This would cause trouble if T is not an atomic type
    ::memset(storage, 0, sizeof(T) * size);
  }

  virtual ~MyVector()
  {
    if (storage)
      delete[] storage;
    DeleteCriticalSection(&cs_store);
    storage = 0;
  }
protected:

  void Reset()
  {
    EnterCriticalSection(&cs_store);
    for (int i = 0; i < used; i++) {
      Release<T>(storage[i]);
      storage[i] = T();
    }
    used = 0;
    LeaveCriticalSection(&cs_store);
  }
  void Remove(int index)
  {
    if (index>=used)
      return;
    Release<T>(storage[index]);
    for (int i = index; i < used; i++)
      storage[i] = storage[i+1];
    used--;
  }
  void ClearMemory(int offset, int clear_size)
  {
    if (clear_size < 0)
      return;
    EnterCriticalSection(&cs_store);
    if (offset+clear_size <= size)
      ::memset(storage+offset, 0, clear_size * sizeof(T)); // jichi 11/30/2013: This is the original code of ITH
    LeaveCriticalSection(&cs_store);
    //else __asm int 3
  }
  int AddToStore(T *con,int amount)
  {
    if (amount <= 0 || con == 0)
      return 0;
    int status = 0;
    EnterCriticalSection(&cs_store);
    if (amount + used + 2 >= size) {
      while (amount + used + 2 >= size)
        size<<=1;
      T *temp;
      if (size * sizeof(T) < 0x1000000) {
        temp = new T[size];
        if (size > used)
          ::memset(temp, 0, (size - used) * sizeof(T)); // jichi 9/25/2013: zero memory
        memcpy(temp, storage, used * sizeof(T));
      } else {
        size = default_size;
        temp = new T[size];
        ::memset(temp, 0, sizeof(T) * size); // jichi 9/25/2013: zero memory
        used = 0;
        status = 1;
      }
      delete[] storage;
      storage = temp;
    }
    memcpy(storage+used, con, amount * sizeof(T));
    used += amount;
    LeaveCriticalSection(&cs_store);
    return status;
  }
  int Find(const T &item, int start = 0, DWORD control = 0)
  {
    int c = -1;
    for (int i=start; i < used; i++)
      if (fCmp(storage[i],item,control)) {
        c=i;
        break;
      }
      //if (storage[i]==item) {c=i;break;}
    return c;
  }


  CRITICAL_SECTION cs_store;
  int size,
      used;
  T *storage;
  fComp fCmp;
};

// EOF

/*
#ifndef ITH_STACK
#define ITH_STACK
template<class T, int default_size>
class MyStack
{
public:
  MyStack(): index(0) {}
  void push_back(const T& e)
  {
    if (index<default_size)
    s[index++]=e;
  }
  void pop_back()
  {
    index--;
  }
  T& back()
  {
    return s[index-1];
  }
  T& operator[](int i) {return s[i];}
  int size() {return index;}
private:
  int index;
  T s[default_size];
};
#endif
*/