Ahh, thanks Norman, it was the combination of LIBS += stdcxx and #include <new> that I was looking for.
Daniel
On 03/20/2013 12:46 AM, Norman Feske wrote:
Hello Daniel,
[...] how do I use the std c++ new placement operator which take void *, i.e.
void * p = ::malloc(256); T * obj = new (p) T();
When I try to use this it cannot find the operator, only the Genode allocator version. I have 'cxx' in my target.mk
in the rare cases where the Genode base system needs a placement new operator, we host it in the implementation file. For example, 'base/src/base/allocator/slab.cc' contains one. This way, the operator is defined only if really intended, which avoids using it by accident. It is a single line of code:
inline void *operator new(size_t, void *at) { return at; }
Alternatively, if you are using the standard C++ library anyway, you may use the definition provided by libsupc++. Just specify your LIBS declaration in your 'target.mk' file as follows:
LIBS = libc libm stdcxx
Now, you can just '#include <new>' and use the placement new operator provided there.
Cheers Norman