[boost-users][StateChart] event creation/destruction
Hello, In my application I use a few async state-machines with lots of events. I'd like to trace some events construction/destruction balance, so I define them as follows: volatile long eventCount; template<class MostDerived> struct EvBase : sc::event<MostDerived> { EvBase() { long c = InterlockedIncrement(&eventCount); somelog << c << std::endl; } ~EvBase() { long c = InterlockedDecrement(&eventCount); somelog << c << std::endl; } }; // inherit EvBase directly struct Ev1 : EvBase<Ev1> {}; struct Ev2 : EvBase<Ev2> {}; struct Ev3 : EvBase<Ev3> {}; // inherit EvBase indirectly template<class MostDerived> struct EvIntermediate : EvBase<MostDerived> {}; struct Ev4 : EvIntermediate<Ev4> {}; When I run the application, I see that at some stage the counter goes negative, and its tendency is to get more and more negative. I guess I don't realize something important about the sc::event, so I'd appreciate enlightment on this. Thanks, Igor'.
volatile long eventCount; template<class MostDerived> struct EvBase : sc::event<MostDerived> { EvBase() { long c = InterlockedIncrement(&eventCount); somelog << c << std::endl; } ~EvBase() { long c = InterlockedDecrement(&eventCount); somelog << c << std::endl; } };
add copy constructor: EvBase( const EvBase& rhs ) : sc::event<MostDerived>( rhs ) { long c = InterlockedIncrement(&eventCount); somelog << c << std::endl; } -- Ivan Kharin
Copyconstruction? Cloning? That are were my first thoughts on the problem. regards Jens Weller -------- Original-Nachricht --------
Datum: Wed, 25 Feb 2009 14:25:21 +0200 Von: Igor R <boost.lists@gmail.com> An: boost-users@lists.boost.org Betreff: [Boost-users] [boost-users][StateChart] event creation/destruction
Hello,
In my application I use a few async state-machines with lots of events. I'd like to trace some events construction/destruction balance, so I define them as follows:
volatile long eventCount; template<class MostDerived> struct EvBase : sc::event<MostDerived> { EvBase() { long c = InterlockedIncrement(&eventCount); somelog << c << std::endl; } ~EvBase() { long c = InterlockedDecrement(&eventCount); somelog << c << std::endl; } }; // inherit EvBase directly struct Ev1 : EvBase<Ev1> {}; struct Ev2 : EvBase<Ev2> {}; struct Ev3 : EvBase<Ev3> {}; // inherit EvBase indirectly template<class MostDerived> struct EvIntermediate : EvBase<MostDerived> {}; struct Ev4 : EvIntermediate<Ev4> {}; When I run the application, I see that at some stage the counter goes negative, and its tendency is to get more and more negative. I guess I don't realize something important about the sc::event, so I'd appreciate enlightment on this.
Thanks,
Igor'.
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"Igor R" <boost.lists@gmail.com> wrote in message news:cfe0a3cf0902250425k37e07743wdf2078d6c1212e16@mail.gmail.com... [snip]
When I run the application, I see that at some stage the counter goes negative, and its tendency is to get more and more negative. I guess I don't realize something important about the sc::event, so I'd appreciate enlightment on this.
Under certain circumstances events need to be copied internally, so you should increment the counter in the copy ctor. HTH, -- Andreas Huber When replying by private email, please remove the words spam and trap from the address shown in the header.
participants (1)
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Andreas Huber -
Igor R -
Ivan Kharin -
Jens Weller