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Untested revised implementation of the SQLite module.

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This commit is contained in:
Sandu Liviu Catalin
2016-06-15 23:49:25 +03:00
parent 166760fd46
commit 8087d0482f
17 changed files with 2235 additions and 2300 deletions
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361
modules/sqlite/Handle/Connection.hpp
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@ -11,14 +11,10 @@
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Manages a reference counted database connection handle.
* The structure that holds the data associated with a certain connection.
*/
class ConnHnd
struct ConnHnd
{
// --------------------------------------------------------------------------------------------
friend class Connection;
friend class Statement;
public:
// --------------------------------------------------------------------------------------------
@ -32,334 +28,76 @@ public:
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.
/* --------------------------------------------------------------------------------------------
* Validate the connection handle and throw an error if invalid.
*/
void Validate() const;
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.
// ----------------------------------------------------------------------------------------
Int32 mStatus; // The last status code of this connection handle.
// ----------------------------------------------------------------------------------------
QueryList mQueue; // A queue of queries to be executed in groups.
// ----------------------------------------------------------------------------------------
Int32 mFlags; // The flags used to create the database connection handle.
String mName; // The specified name to be used as the database file.
String mVFS; // The specified virtual file system.
// ----------------------------------------------------------------------------------------
bool mMemory; // Whether the database exists in memory and not disk.
bool mTrace; // Whether tracing was activated on the database.
bool mProfile; // Whether profiling was activated on the database.
/* ----------------------------------------------------------------------------------------
* Base constructor.
*/
Handle(Counter counter)
: mPtr(nullptr)
, mRef(counter)
, mStatus(SQLITE_OK)
, mQueue()
, mFlags(0)
, mName()
, mVFS()
, mMemory(false)
, mTrace(false)
, mProfile(false)
{
/* ... */
}
/* ----------------------------------------------------------------------------------------
* Destructor.
*/
~Handle();
/* ----------------------------------------------------------------------------------------
* Create the database connection resource.
*/
void Create(CSStr name, Int32 flags, CSStr vfs);
/* ----------------------------------------------------------------------------------------
* Execute a specific amount of queries from the queue.
*/
Int32 Flush(Uint32 num, Object & env, Function & func);
};
private:
// --------------------------------------------------------------------------------------------
Handle * m_Hnd; // The managed handle instance.
/* --------------------------------------------------------------------------------------------
* 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)
{
/* ... */
}
// --------------------------------------------------------------------------------------------
Pointer mPtr; // The connection handle resource.
// --------------------------------------------------------------------------------------------
Int32 mStatus; // The last status code of this connection handle.
// --------------------------------------------------------------------------------------------
QueryList mQueue; // A queue of queries to be executed in groups.
// --------------------------------------------------------------------------------------------
Int32 mFlags; // The flags used to create the database connection handle.
String mName; // The specified name to be used as the database file.
String mVFS; // The specified virtual file system.
// --------------------------------------------------------------------------------------------
bool mMemory; // Whether the database exists in memory and not disk.
bool mTrace; // Whether tracing was activated on the database.
bool mProfile; // Whether profiling was activated on the database.
/* --------------------------------------------------------------------------------------------
* Copy constructor.
* Default constructor.
*/
ConnHnd(const ConnHnd & o)
: m_Hnd(o.m_Hnd)
{
Grab();
}
ConnHnd();
/* --------------------------------------------------------------------------------------------
* Move constructor.
* Copy constructor. (disabled)
*/
ConnHnd(ConnHnd && o)
: m_Hnd(o.m_Hnd)
{
o.m_Hnd = nullptr;
}
ConnHnd(const ConnHnd & o) = delete;
/* --------------------------------------------------------------------------------------------
* Move constructor. (disabled)
*/
ConnHnd(ConnHnd && o) = delete;
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~ConnHnd()
{
Drop();
}
~ConnHnd();
/* --------------------------------------------------------------------------------------------
* Copy assignment operator.
* Copy assignment operator. (disabled)
*/
ConnHnd & operator = (const ConnHnd & o)
{
if (m_Hnd != o.m_Hnd)
{
Drop();
m_Hnd = o.m_Hnd;
Grab();
}
return *this;
}
ConnHnd & operator = (const ConnHnd & o) = delete;
/* --------------------------------------------------------------------------------------------
* Move assignment operator.
* Move assignment operator. (disabled)
*/
ConnHnd & operator = (ConnHnd && o)
{
if (m_Hnd != o.m_Hnd)
{
m_Hnd = o.m_Hnd;
o.m_Hnd = nullptr;
}
return *this;
}
ConnHnd & operator = (ConnHnd && o) = delete;
/* --------------------------------------------------------------------------------------------
* Status assignment operator.
* Create the database connection resource.
*/
ConnHnd & operator = (Int32 status)
{
if (m_Hnd)
{
m_Hnd->mStatus = status;
}
return *this;
}
void Create(CSStr name, Int32 flags, CSStr vfs);
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison between two connection handles.
* Execute a specific amount of queries from the queue.
*/
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->mStatus == status);
}
return false;
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison with an integer value status.
*/
bool operator != (Int32 status) const
{
if (m_Hnd)
{
return (m_Hnd->mStatus != 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;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the last known status code.
*/
Int32 Status() const
{
return m_Hnd ? m_Hnd->mStatus : SQLITE_NOMEM;
}
Int32 Flush(Uint32 num, Object & env, Function & func);
/* --------------------------------------------------------------------------------------------
* Retrieve the message of the last received error code.
*/
CCStr ErrStr() const
{
// SQLite does it's null pointer validations internally
if (m_Hnd)
{
return sqlite3_errstr(sqlite3_errcode(m_Hnd->mPtr));
}
return _SC("");
return sqlite3_errstr(sqlite3_errcode(mPtr));
}
/* --------------------------------------------------------------------------------------------
@ -367,12 +105,7 @@ public:
*/
CCStr ErrMsg() const
{
// SQLite does it's null pointer validations internally
if (m_Hnd)
{
return sqlite3_errmsg(m_Hnd->mPtr);
}
return _SC("");
return sqlite3_errmsg(mPtr);
}
/* --------------------------------------------------------------------------------------------
@ -380,12 +113,7 @@ public:
*/
Int32 ErrNo() const
{
// SQLite does it's null pointer validations internally
if (m_Hnd)
{
return sqlite3_errcode(m_Hnd->mPtr);
}
return SQLITE_NOMEM;
return sqlite3_errcode(mPtr);
}
/* --------------------------------------------------------------------------------------------
@ -393,12 +121,7 @@ public:
*/
Int32 ExErrNo() const
{
// SQLite does it's null pointer validations internally
if (m_Hnd)
{
return sqlite3_extended_errcode(m_Hnd->mPtr);
}
return SQLITE_NOMEM;
return sqlite3_extended_errcode(mPtr);
}
};