> >> OP> = PTHREAD_MUTEX_INITIALIZER;
> OP> rtl-3.0preX ??
> i dont't think that rtl has influence on the stl? why should rtl
> define a macro which is used only by the c++ stl?
The RTL posix interface I guess. As I remember the STL of libstdc++/gcc-2.95.2
isn't thread save and I wonder to find the above statements. Maybee only some
container are thread save.
The problem relays to:
# grep PTHREAD_MUTEX_INITIALIZER /usr/include/rtlinux/*
[...]
/usr/include/rtlinux/rtl_mutex.h:#define PTHREAD_MUTEX_INITIALIZER { 0,0,1,
SPIN_LOCK_UNLOCKED, PTHREAD_MUTEX_DEFAULT, RTL_WAIT_INITIALIZER, PTHREAD_PRIO_NONE }
I've no idea wher the include come from. It occours only by mixing kernel and
stl includes using
g++ -I/usr/include/linux @RTL_INC@ ....
> OP> rtti needs typeinfo's which are compiler spezific as I assume.
> OP> You can use an overlaoded int type() whih returns an unique id of each class.
> OP> Than you can compare a->type() == b->type(). dynamic_cast throws as well - here
> does it? i thought that it will return a null pointer if there is no
> cast possible ...
I agree, but Stroustrup "The Std C++ Language" De/4.Ed pg 410: bad_cast throws
by dynamic_cast, or Chapter 15.4.1. Dynamic cast of references. Summary:
bad_cast will only be thrown on wrong arguments.
> OP> Only of interest ist __do_global_dtors_aux && __do_global_ctors_aux for
> OP> globals imo. No idea about the rest like _register_frame_info yet.
> do you link against the stdlibs or against nothing at all (means no
> startup code)?
No startup code, I've need it not yet. At moment I write a small libkcpp for me
(there is only strerror, perror, new/delete und a errno class- which will be
replaced by a normal int maybee later). The only lib I link is the libm.a
> OP> > but when i use c-style casts like the following:
> >>
> >> SomeDerivedClass* pDC = new SomeDerivedClass;
> >> void* pv = (void*) (pDC);
> >> SomeBaseClass* pBC = (SomeBaseClass*) pv;
> >>
> >> same for downcasts:
> >>
> >> SomeBaseClass *pBC; // assuming that pBC stores a
> >> // link to some derived class of
> >> // SomeBaseClass!
> >> ...
> >>
> >> void* pv = (void*) pBC;
> >> (SomeDerivedClass*) (pBC)->DoSomething();
> >>
> >> this perfectly works even with the -fno-rtti flag set ...
> OP> C-cast ... you know what you do - they are not type safe, so if you cast wrong
> OP> and use it, you can reboot (maybee).
> probably it will reboot the machine by itself |*7 ... but i have got
> some experience with rebooting and locking up my system now ... ;-)
Me too >8)
Olaf
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