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d2f3da1747
SqMod/source/Routine.hpp
Sandu Liviu Catalin d2f3da1747 Catch exceptions during server callbacks. 
Allow routines to safely terminate routines during execution.
Various other fixes and improvements.
2016-03-12 08:47:50 +02:00

544 lines
22 KiB
C++
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#ifndef _ROUTINE_HPP_
#define _ROUTINE_HPP_
// ------------------------------------------------------------------------------------------------
#include "Base/Shared.hpp"
// ------------------------------------------------------------------------------------------------
#include <vector>
#include <map>
// ------------------------------------------------------------------------------------------------
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Execute callbacks after specific intervals of time.
*/
class Routine
{
public:
/* --------------------------------------------------------------------------------------------
* Simplify future changes to a single point of change.
*/
typedef SQInteger Interval;
typedef Uint32 Iterate;
typedef std::vector< Routine * > Routines;
/* --------------------------------------------------------------------------------------------
* Process all active routines and update elapsed time.
*/
static void Process();
/* --------------------------------------------------------------------------------------------
* Release all resources and prepare for shutdown.
*/
static void TerminateAll();
protected:
/* --------------------------------------------------------------------------------------------
* Commands that can be performed when the buckets are unlocked.
*/
enum
{
CMD_REMOVE = 1,
CMD_DETACH = 2,
CMD_ATTACH = 3
};
/* --------------------------------------------------------------------------------------------
* Group of routines that have the same interval.
*/
struct Bucket
{
// ----------------------------------------------------------------------------------------
Interval mInterval; /* The interval of time between calls. */
Interval mElapsed; /* Time elapsed since the last pulse. */
Routines mRoutines; /* Routines to trigger on completion. */
/* ----------------------------------------------------------------------------------------
* Default constructor.
*/
Bucket(Interval interval)
: mInterval(interval), mElapsed(0), mRoutines()
{
/* ... */
}
/* ----------------------------------------------------------------------------------------
* Copy constructor.
*/
Bucket(const Bucket & o) = default;
/* ----------------------------------------------------------------------------------------
* Move constructor.
*/
Bucket(Bucket && o) = default;
/* ----------------------------------------------------------------------------------------
* Destructor.
*/
~Bucket() = default;
/* ----------------------------------------------------------------------------------------
* Copy assignment operator.
*/
Bucket & operator = (const Bucket & o) = default;
/* ----------------------------------------------------------------------------------------
* Move assignment operator.
*/
Bucket & operator = (Bucket && o) = default;
};
/* --------------------------------------------------------------------------------------------
* A command to perform certain actions when the buckets are unlocked.
*/
struct Cmd
{
// ----------------------------------------------------------------------------------------
Routine* mRoutine; /* The routine to which this command applies */
Interval mInterval; /* The bucket where this routine is stored. */
Uint16 mCommand; /* The command that must be performed. */
/* ----------------------------------------------------------------------------------------
* Base constructor.
*/
Cmd(Routine * routine, Interval interval, Uint16 command)
: mRoutine(routine), mInterval(interval), mCommand(command)
{
/* ... */
}
/* ----------------------------------------------------------------------------------------
* Copy constructor.
*/
Cmd(const Cmd & o) = default;
/* ----------------------------------------------------------------------------------------
* Move constructor.
*/
Cmd(Cmd && o) = default;
/* ----------------------------------------------------------------------------------------
* Destructor.
*/
~Cmd() = default;
/* ----------------------------------------------------------------------------------------
* Copy assignment operator.
*/
Cmd & operator = (const Cmd & o) = default;
/* ----------------------------------------------------------------------------------------
* Move assignment operator.
*/
Cmd & operator = (Cmd && o) = default;
};
// --------------------------------------------------------------------------------------------
typedef Int64 Time;
typedef std::vector< Cmd > Queue;
typedef std::vector< Bucket > Buckets;
typedef std::unordered_map< Routine *, Object > Objects;
/* --------------------------------------------------------------------------------------------
* Functor used to search for buckets with a certain interval.
*/
struct IntrvFunc
{
private:
// ----------------------------------------------------------------------------------------
const Interval m_Interval; /* The interval to be matched. */
public:
/* ----------------------------------------------------------------------------------------
* Base constructor.
*/
IntrvFunc(Interval interval)
: m_Interval(interval)
{
/* ... */
}
/* ----------------------------------------------------------------------------------------
* Function call operator.
*/
bool operator () (Buckets::reference elem) const
{
return (elem.mInterval == m_Interval);
}
/* ----------------------------------------------------------------------------------------
* Function call operator.
*/
bool operator () (Buckets::const_reference elem) const
{
return (elem.mInterval == m_Interval);
}
};
// --------------------------------------------------------------------------------------------
static bool s_Lock; /* Avoid further changes to the bucket pool. */
static Time s_Last; /* Last time point. */
static Time s_Prev; /* Previous time point. */
static Queue s_Queue; /* Actions to be performed when the buckets aren't locked */
static Buckets s_Buckets; /* Buckets of routines grouped by similar intervals. */
static Objects s_Objects; /* List of existing routines and their associated object. */
/* --------------------------------------------------------------------------------------------
* Attach a routine to a certain bucket.
*/
static void Attach(Routine * routine, Interval interval);
/* --------------------------------------------------------------------------------------------
* Detach a routine from a certain bucket.
*/
static void Detach(Routine * routine, Interval interval);
/* --------------------------------------------------------------------------------------------
* Create or locate the object for the specified routine and keep a strong reference to it.
*/
static Object Associate(Routine * routine);
/* --------------------------------------------------------------------------------------------
* Release the strong reference associated with the specified routine so it can be destroyed.
*/
static void Dissociate(Routine * routine);
/* --------------------------------------------------------------------------------------------
* See whether the specified routine exists in the pool and references itself.
*/
static bool Associated(Routine * routine);
/* --------------------------------------------------------------------------------------------
* Remove the specified routine from the pool and any associated reference, if any.
*/
static void Forget(Routine * routine);
/* --------------------------------------------------------------------------------------------
* Process queue commands.
*/
static void ProcQueue();
/* --------------------------------------------------------------------------------------------
* See whether this routine is valid otherwise throw an exception.
*/
void Validate() const
{
if (m_Terminated)
{
SqThrowF("Routine [%s] => Was terminated", m_Tag.c_str());
}
}
private:
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval.
*/
Routine(Object & env, Function & func, Interval interval);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval and explicit iterations.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval, explicit iterations and arguments.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval, explicit iterations and arguments.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval, explicit iterations and arguments.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval, explicit iterations and arguments.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3, Object & a4);
/* --------------------------------------------------------------------------------------------
* Constructor with just an interval, explicit iterations and arguments.
*/
Routine(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3, Object & a4, Object & a5);
/* --------------------------------------------------------------------------------------------
* Copy constructor. (disabled)
*/
Routine(const Routine &);
/* --------------------------------------------------------------------------------------------
* Copy assignment operator. (disabled)
*/
Routine & operator = (const Routine &);
private:
/* --------------------------------------------------------------------------------------------
* Number of iterations before self destruct.
*/
Iterate m_Iterations;
/* --------------------------------------------------------------------------------------------
* Interval between calls.
*/
Interval m_Interval;
/* --------------------------------------------------------------------------------------------
* Number of arguments to forward.
*/
Uint8 m_Arguments;
/* --------------------------------------------------------------------------------------------
* Whether calls should be ignored.
*/
bool m_Suspended;
/* --------------------------------------------------------------------------------------------
* Whether the routine was terminated.
*/
bool m_Terminated;
/* --------------------------------------------------------------------------------------------
* The callback to be executed when triggered.
*/
Function m_Callback;
/* --------------------------------------------------------------------------------------------
* User tag associated with this instance.
*/
String m_Tag;
/* --------------------------------------------------------------------------------------------
* User data associated with this instance.
*/
Object m_Data;
/* --------------------------------------------------------------------------------------------
* Arguments to be forwarded to the callback.
*/
Object m_Arg1, m_Arg2, m_Arg3, m_Arg4, m_Arg5, m_Arg6, m_Arg7,
m_Arg8, m_Arg9, m_Arg10, m_Arg11, m_Arg12, m_Arg13, m_Arg14;
public:
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~Routine();
/* --------------------------------------------------------------------------------------------
* Used by the script engine to compare two instances of this type.
*/
Int32 Cmp(const Routine & o) const;
/* --------------------------------------------------------------------------------------------
* Used by the script engine to convert an instance of this type to a string.
*/
CSStr ToString() const;
/* --------------------------------------------------------------------------------------------
* Used by the script engine to retrieve the name from instances of this type.
*/
static SQInteger Typename(HSQUIRRELVM vm);
/* --------------------------------------------------------------------------------------------
* Retrieve the associated user tag.
*/
const String & GetTag() const;
/* --------------------------------------------------------------------------------------------
* Modify the associated user tag.
*/
void SetTag(CSStr tag);
/* --------------------------------------------------------------------------------------------
* Retrieve the associated user data.
*/
Object & GetData();
/* --------------------------------------------------------------------------------------------
* Modify the associated user data.
*/
void SetData(Object & data);
/* --------------------------------------------------------------------------------------------
* Modify the associated user tag and allow chaining of operations.
*/
Routine & ApplyTag(CSStr tag);
/* --------------------------------------------------------------------------------------------
* Modify the associated user data and allow chaining of operations.
*/
Routine & ApplyData(Object & data);
/* --------------------------------------------------------------------------------------------
* Terminate this routine by releasing all resources and scheduling it for detachment.
*/
void Terminate();
/* --------------------------------------------------------------------------------------------
* Modify an explicit value to be passed as the specified argument.
*/
Routine & SetArg(Uint8 num, Object & val);
/* --------------------------------------------------------------------------------------------
* Retrieve the value that is passed as the specified argument.
*/
Object & GetArg(Uint8 num);
/* --------------------------------------------------------------------------------------------
* Retrieve the amount of time required to wait between calls to the routine.
*/
Interval GetInterval() const;
/* --------------------------------------------------------------------------------------------
* Modify the amount of time required to wait between calls to the routine.
*/
void SetInterval(Interval interval);
/* --------------------------------------------------------------------------------------------
* Retrieve the number of times that the routine can be called before terminating itself.
*/
Iterate GetIterations() const;
/* --------------------------------------------------------------------------------------------
* Modify the number of times that the routine can be called before terminating itself.
*/
void SetIterations(Iterate iterations);
/* --------------------------------------------------------------------------------------------
* Retrieve the number of arguments that are forwarded when executing the callback.
*/
Uint8 GetArguments() const;
/* --------------------------------------------------------------------------------------------
* Modify the number of arguments that are forwarded when executing the callback.
*/
void SetArguments(Uint8 num);
/* --------------------------------------------------------------------------------------------
* See whether the routine is suspended from further calls.
*/
bool GetSuspended() const;
/* --------------------------------------------------------------------------------------------
* Set whether the routine is suspended from further calls.
*/
void SetSuspended(bool toggle);
/* --------------------------------------------------------------------------------------------
* See whether the routine was terminated or not.
*/
bool GetTerminated() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the currently binded callback.
*/
Function & GetCallback();
/* --------------------------------------------------------------------------------------------
* Bind a certain function to be executed when this routine is triggered.
*/
void SetCallback(Object & env, Function & func);
protected:
/* --------------------------------------------------------------------------------------------
* Release routine resources.
*/
void Release();
/* --------------------------------------------------------------------------------------------
* Create the routine for the first time.
*/
void Create();
/* --------------------------------------------------------------------------------------------
* Attach the routine to the associated bucket.
*/
void Attach();
/* --------------------------------------------------------------------------------------------
* Attach the routine from the associated bucket.
*/
void Detach();
/* --------------------------------------------------------------------------------------------
* Execute the binded callback.
*/
void Execute();
public:
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval.
*/
static Object Create(Object & env, Function & func, Interval interval);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval and explicit iterations.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval, explicit iterations and arguments.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval, explicit iterations and arguments.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval, explicit iterations and arguments.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval, explicit iterations and arguments.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3, Object & a4);
/* --------------------------------------------------------------------------------------------
* Create a routine with just an interval, explicit iterations and arguments.
*/
static Object Create(Object & env, Function & func, Interval interval, Iterate iterations
, Object & a1, Object & a2, Object & a3, Object & a4, Object & a5);
/* --------------------------------------------------------------------------------------------
* Return the number of known routines.
*/
static Uint32 Count();
/* --------------------------------------------------------------------------------------------
* Attempt to find a certain routine by its associated tag.
*/
static Object FindByTag(CSStr tag);
};
} // Namespace:: SqMod
#endif // _ROUTINE_HPP_
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