I have got the following problem:
I have an Object A running the main thread of an application.
There is a Object B running a seperate thread for some background processing.
(Both objects running in a process 
)
Object B wants to inform Object A about it’s background processing status
when Object B’s status changes (hope thats somehow clearly explained).
My idea was that Object B should generate an event (e.q. SDL_UserEvent) and put
it to the event queue. Object A can receive this event and react somehow.
BUT, …
My 'lil Object B wants to exchange data (status param, etc…) with Object A. So
i need at least a pointer that i can pass.
My suggestion whould be to extend the current event structs and add a special
event which can pass parameters.
e.q. :
/* Event enumerations /
enum { SDL_NOEVENT, / Unused (do not remove) /
SDL_ACTIVEEVENT, / Application loses/gains visibility /
SDL_KEYDOWN, / Keys pressed /
SDL_KEYUP, / Keys released /
SDL_MOUSEMOTION, / Mouse moved /
SDL_MOUSEBUTTONDOWN, / Mouse button pressed /
SDL_MOUSEBUTTONUP, / Mouse button released /
SDL_JOYMOTION, / Joystick axis motion /
SDL_JOYBUTTONDOWN, / Joystick button pressed /
SDL_JOYBUTTONUP, / Joystick button released /
SDL_QUIT, / User-requested quit /
SDL_SYSWMEVENT, / System specific event */
SDL_APPEVENT, <<< MAYBE THE NEW ONE
/* Events SDL_USEREVENT through SDL_MAXEVENTS-1 are for your use */
SDL_USEREVENT = 24,
/* This last event is only for bounding internal arrays
It is the number of bits in the event mask datatype -- Uint32
*/
SDL_NUMEVENTS = 32
};
/* Predefined event masks */
#define SDL_EVENTMASK(X) (1<<(X))
enum {
SDL_ACTIVEEVENTMASK = SDL_EVENTMASK(SDL_ACTIVEEVENT),
SDL_KEYDOWNMASK = SDL_EVENTMASK(SDL_KEYDOWN),
SDL_KEYUPMASK = SDL_EVENTMASK(SDL_KEYUP),
SDL_MOUSEMOTIONMASK = SDL_EVENTMASK(SDL_MOUSEMOTION),
SDL_MOUSEBUTTONDOWNMASK = SDL_EVENTMASK(SDL_MOUSEBUTTONDOWN),
SDL_MOUSEBUTTONUPMASK = SDL_EVENTMASK(SDL_MOUSEBUTTONUP),
SDL_JOYMOTIONMASK = SDL_EVENTMASK(SDL_JOYMOTION),
SDL_JOYBUTTONDOWNMASK = SDL_EVENTMASK(SDL_JOYBUTTONDOWN),
SDL_JOYBUTTONUPMASK = SDL_EVENTMASK(SDL_JOYBUTTONUP),
SDL_QUITMASK = SDL_EVENTMASK(SDL_QUIT),
SDL_SYSWMEVENTMASK = SDL_EVENTMASK(SDL_SYSWMEVENT)
SDL_APPEVENTMASK = SDL_EVENTMASK(SDL_APPEVENT) <<<
};
typedef struct {
Uint8 type;
Uint32 id;
void* param;
} SDL_AppEvent;
typedef union {
Uint8 type;
SDL_ActiveEvent active;
SDL_KeyboardEvent key;
SDL_MouseMotionEvent motion;
SDL_MouseButtonEvent button;
SDL_QuitEvent quit;
SDL_SysWMEvent syswm;
SDL_AppEvent app; <<<
} SDL_Event;
maybe it could be renamed to something else
What do you think of my weird ideas Sam ?
Alex