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SqMod/modules/mysql/Handles.hpp
Sandu Liviu Catalin 40a2ba46f5 Various changes to the modules. 
Also commited the remaining incomplete modules.
2016-05-22 22:34:27 +03:00

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#ifndef _SQMYSQL_HANDLES_HPP_
#define _SQMYSQL_HANDLES_HPP_
// ------------------------------------------------------------------------------------------------
#include "Common.hpp"
// ------------------------------------------------------------------------------------------------
#include <mysql.h>
// ------------------------------------------------------------------------------------------------
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Forward declarations.
*/
class Connection;
class Statement;
class Column;
class Transaction;
/* ------------------------------------------------------------------------------------------------
* Manages a reference counted database connection handle.
*/
class ConnHnd
{
// --------------------------------------------------------------------------------------------
friend class Connection;
friend class Statement;
public:
// --------------------------------------------------------------------------------------------
typedef MYSQL Type; // The managed type.
// --------------------------------------------------------------------------------------------
typedef Type* Pointer; // Pointer to the managed type.
typedef const Type* ConstPtr; // Constant pointer to the managed type.
// --------------------------------------------------------------------------------------------
typedef Type& Reference; // Reference to the managed type.
typedef const Type& ConstRef; // Constant reference to the managed type.
// --------------------------------------------------------------------------------------------
typedef unsigned int Counter; // Reference counter type.
protected:
// --------------------------------------------------------------------------------------------
typedef std::vector< String > QueryList; // Container used to queue queries.
/* --------------------------------------------------------------------------------------------
* The structure that holds the data associated with a certain connection.
*/
struct Handle
{
// ----------------------------------------------------------------------------------------
Pointer mPtr; // The connection handle resource.
Counter mRef; // Reference count to the managed handle.
// ----------------------------------------------------------------------------------------
Uint32 mErrNo; // Last received error string.
String mErrStr; // Last received error message.
// --------------------------------------------------------------------------------------------
String mHost; // Host address.
String mUser; // User name user.
String mPass; // User password.
Uint16 mPort; // Server port.
// --------------------------------------------------------------------------------------------
String mSchema; // Server schema.
String mSocket; // Unix socket.
// --------------------------------------------------------------------------------------------
String mSSL_Key; // SSL key.
String mSSL_Cert; // SSL certificate.
String mSSL_CA; // SSL certificate authority.
String mSSL_CA_Path; // SSL certificate authority path.
String mSSL_Cipher; // SSL Cipher.
// --------------------------------------------------------------------------------------------
Options mOptions; // Option container.
// ----------------------------------------------------------------------------------------
QueryList mQueue; // A queue of queries to be executed in groups.
// --------------------------------------------------------------------------------------------
bool mAutocommit; // Whether autocommit is enabled on this connection.
bool mInTransaction; // Whether the connection is in the middle of a transaction.
/* ----------------------------------------------------------------------------------------
* Base constructor.
*/
Handle(Counter counter)
: mPtr(nullptr)
, mRef(counter)
, mErrNo(0)
, mErrStr(_SC(""))
, mHost(_SC(""))
, mUser(_SC(""))
, mPass(_SC(""))
, mPort(3306)
, mSchema(_SC(""))
, mSocket(_SC(""))
, mSSL_Key(_SC(""))
, mSSL_Cert(_SC(""))
, mSSL_CA(_SC(""))
, mSSL_CA_Path(_SC(""))
, mSSL_Cipher(_SC(""))
, mOptions(_SC(""))
, mQueue()
, mAutocommit(false)
, mInTransaction(false)
{
/* ... */
}
/* ----------------------------------------------------------------------------------------
* Destructor.
*/
~Handle();
/* ----------------------------------------------------------------------------------------
* Create the database connection resource.
*/
void Create(CSStr host, CSStr user, CSStr pass, CSStr schema, Uint16 port, CSStr socket);
/* ----------------------------------------------------------------------------------------
* Execute a specific amount of queries from the queue.
*/
Int32 Flush(Uint32 num, Object & env, Function & func);
};
private:
// --------------------------------------------------------------------------------------------
Handle* m_Hnd;
/* --------------------------------------------------------------------------------------------
* Grab a strong reference to a connection handle.
*/
void Grab()
{
if (m_Hnd)
{
++(m_Hnd->mRef);
}
}
/* --------------------------------------------------------------------------------------------
* Drop a strong reference to a connection handle.
*/
void Drop()
{
if (m_Hnd && --(m_Hnd->mRef) == 0)
{
delete m_Hnd; // Let the destructor take care of cleaning up (if necessary)
}
}
/* --------------------------------------------------------------------------------------------
* Base constructor.
*/
ConnHnd(CSStr name)
: m_Hnd(name ? new Handle(1) : nullptr)
{
/* ... */
}
public:
/* --------------------------------------------------------------------------------------------
* Default constructor (null).
*/
ConnHnd()
: m_Hnd(nullptr)
{
/* ... */
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
ConnHnd(const ConnHnd & o)
: m_Hnd(o.m_Hnd)
{
Grab();
}
/* --------------------------------------------------------------------------------------------
* Move constructor.
*/
ConnHnd(ConnHnd && o)
: m_Hnd(o.m_Hnd)
{
o.m_Hnd = nullptr;
}
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~ConnHnd()
{
Drop();
}
/* --------------------------------------------------------------------------------------------
* Copy assignment operator.
*/
ConnHnd & operator = (const ConnHnd & o)
{
if (m_Hnd != o.m_Hnd)
{
Drop();
m_Hnd = o.m_Hnd;
Grab();
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Move assignment operator.
*/
ConnHnd & operator = (ConnHnd && o)
{
if (m_Hnd != o.m_Hnd)
{
m_Hnd = o.m_Hnd;
o.m_Hnd = nullptr;
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Status assignment operator.
*/
ConnHnd & operator = (Int32 status)
{
if (m_Hnd)
{
m_Hnd->mErrNo = status;
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison between two connection handles.
*/
bool operator == (const ConnHnd & o) const
{
return (m_Hnd == o.m_Hnd);
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison between two connection handles.
*/
bool operator != (const ConnHnd & o) const
{
return (m_Hnd != o.m_Hnd);
}
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison with an integer value status.
*/
bool operator == (Int32 status) const
{
if (m_Hnd)
{
return (m_Hnd->mErrNo == status);
}
return false;
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison with an integer value status.
*/
bool operator != (Int32 status) const
{
if (m_Hnd)
{
return (m_Hnd->mErrNo != status);
}
return false;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to boolean for use in boolean operations.
*/
operator bool () const
{
return m_Hnd && m_Hnd->mPtr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Pointer ()
{
return m_Hnd ? m_Hnd->mPtr : nullptr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Pointer () const
{
return m_Hnd ? m_Hnd->mPtr : nullptr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Reference ()
{
assert(m_Hnd && m_Hnd->mPtr);
return *(m_Hnd->mPtr);
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator ConstRef () const
{
assert(m_Hnd && m_Hnd->mPtr);
return *(m_Hnd->mPtr);
}
/* --------------------------------------------------------------------------------------------
* Member operator for dereferencing the managed pointer.
*/
Handle * operator -> () const
{
assert(m_Hnd);
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Indirection operator for obtaining a reference of the managed pointer.
*/
Handle & operator * () const
{
assert(m_Hnd);
return *m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the raw handle structure pointer.
*/
Handle * HndPtr()
{
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the raw handle structure pointer.
*/
Handle * HndPtr() const
{
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the number of active references to the managed instance.
*/
Counter Count() const
{
return m_Hnd ? m_Hnd->mRef : 0;
}
};
/* ------------------------------------------------------------------------------------------------
* Manages a reference counted database statement handle.
*/
class StmtHnd
{
// --------------------------------------------------------------------------------------------
friend class Connection;
friend class Statement;
public:
// --------------------------------------------------------------------------------------------
typedef MYSQL_STMT Type; // The managed type.
// --------------------------------------------------------------------------------------------
typedef Type* Pointer; // Pointer to the managed type.
typedef const Type* ConstPtr; // Constant pointer to the managed type.
// --------------------------------------------------------------------------------------------
typedef Type& Reference; // Reference to the managed type.
typedef const Type& ConstRef; // Constant reference to the managed type.
// --------------------------------------------------------------------------------------------
typedef MYSQL_BIND BindType; // The managed type.
// --------------------------------------------------------------------------------------------
typedef BindType* BindPointer; // Pointer to the managed type.
typedef const BindType* BindConstPtr; // Constant pointer to the managed type.
// --------------------------------------------------------------------------------------------
typedef BindType& BindReference; // Reference to the managed type.
typedef const BindType& BindConstRef; // Constant reference to the managed type.
// --------------------------------------------------------------------------------------------
typedef unsigned int Counter; // Reference counter type.
protected:
// --------------------------------------------------------------------------------------------
typedef std::map< String, int > Indexes; // Container used to identify column indexes.
/* --------------------------------------------------------------------------------------------
* The structure that holds the data associated with a certain statement.
*/
struct Handle
{
// --------------------------------------------------------------------------------------------
Pointer mPtr; // The statement handle resource.
Counter mRef; // Reference count to the managed handle.
// ----------------------------------------------------------------------------------------
Int32 mErrNo; // The last status code of this connection handle.
// ----------------------------------------------------------------------------------------
MYSQL_BIND* mBinds;
/* ----------------------------------------------------------------------------------------
* Base constructor.
*/
Handle(const ConnHnd & conn, Counter counter)
: mPtr(nullptr)
, mRef(counter)
, mErrNo(0)
{
/* ... */
}
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~Handle();
/* --------------------------------------------------------------------------------------------
* Create the database statement resource.
*/
void Create(CSStr query);
};
private:
// --------------------------------------------------------------------------------------------
Handle* m_Hnd;
/* --------------------------------------------------------------------------------------------
* Grab a strong reference to a statement handle.
*/
void Grab()
{
if (m_Hnd)
{
++(m_Hnd->mRef);
}
}
/* --------------------------------------------------------------------------------------------
* Drop a strong reference to a statement handle.
*/
void Drop()
{
if (m_Hnd && --(m_Hnd->mRef) == 0)
{
delete m_Hnd; // Let the destructor take care of cleaning up (if necessary)
}
}
/* --------------------------------------------------------------------------------------------
* Base constructor.
*/
StmtHnd(const ConnHnd & db)
: m_Hnd(new Handle(db, 1))
{
/* ... */
}
public:
/* --------------------------------------------------------------------------------------------
* Default constructor (null).
*/
StmtHnd()
: m_Hnd(nullptr)
{
/* ... */
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
StmtHnd(const StmtHnd & o)
: m_Hnd(o.m_Hnd)
{
Grab();
}
/* --------------------------------------------------------------------------------------------
* Move constructor.
*/
StmtHnd(StmtHnd && o)
: m_Hnd(o.m_Hnd)
{
o.m_Hnd = nullptr;
}
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~StmtHnd()
{
Drop();
}
/* --------------------------------------------------------------------------------------------
* Copy assignment operator.
*/
StmtHnd & operator = (const StmtHnd & o)
{
if (m_Hnd != o.m_Hnd)
{
Drop();
m_Hnd = o.m_Hnd;
Grab();
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Move assignment operator.
*/
StmtHnd & operator = (StmtHnd && o)
{
if (m_Hnd != o.m_Hnd)
{
m_Hnd = o.m_Hnd;
o.m_Hnd = nullptr;
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Status assignment operator.
*/
StmtHnd & operator = (Int32 status)
{
if (m_Hnd)
{
m_Hnd->mErrNo = status;
}
return *this;
}
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison between two statement handles.
*/
bool operator == (const StmtHnd & o) const
{
return (m_Hnd == o.m_Hnd);
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison between two statement handles.
*/
bool operator != (const StmtHnd & o) const
{
return (m_Hnd != o.m_Hnd);
}
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison with an integer value status.
*/
bool operator == (Int32 status) const
{
if (m_Hnd)
{
return (m_Hnd->mErrNo == status);
}
return false;
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison with an integer status value.
*/
bool operator != (Int32 status) const
{
if (m_Hnd)
{
return (m_Hnd->mErrNo != status);
}
return false;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to boolean for use in boolean operations.
*/
operator bool () const
{
return m_Hnd && m_Hnd->mPtr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Pointer ()
{
return m_Hnd ? m_Hnd->mPtr : nullptr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Pointer () const
{
return m_Hnd ? m_Hnd->mPtr : nullptr;
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator Reference ()
{
assert(m_Hnd && m_Hnd->mPtr);
return *(m_Hnd->mPtr);
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to the managed instance.
*/
operator ConstRef () const
{
assert(m_Hnd && m_Hnd->mPtr);
return *(m_Hnd->mPtr);
}
/* --------------------------------------------------------------------------------------------
* Member operator for dereferencing the managed pointer.
*/
Handle * operator -> () const
{
assert(m_Hnd);
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Indirection operator for obtaining a reference of the managed pointer.
*/
Handle & operator * () const
{
assert(m_Hnd);
return *m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the raw handle structure pointer.
*/
Handle * HndPtr()
{
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the raw handle structure pointer.
*/
Handle * HndPtr() const
{
return m_Hnd;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the number of active references to the managed instance.
*/
Counter Count() const
{
return m_Hnd ? m_Hnd->mRef : 0;
}
};
} // Namespace:: SqMod
#endif // _SQMYSQL_HANDLES_HPP_
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