Date: 2001-10-11 10:04:59
--- In boost_at_y..., Karl Pitrich <pit_at_r...> wrote:
> libs/thread/build/../src/once.cpp:88: cannot convert `void (*) ()'
> `const void *' for argument `2' to `pthread_setspecific (unsigned
> const void *)'
I did not yet comile once.cpp before, but tried it now:
GCC 3.0.1 is more informative:
home/helmut/dev/mylibs/boost/libs/thread/src/once.cpp: In function
/home/helmut/dev/mylibs/boost/libs/thread/src/once.cpp:41: ISO C++
casting between pointer-to-function and pointer-to-object
/home/helmut/dev/mylibs/boost/libs/thread/src/once.cpp: In function
boost::call_once(void (*)(), once_flag&)':
(*)()' to `const void*' for argument `2' to `int
pthread_setspecific(unsigned int, const void*)'
As I understand, this might be a real problem:
A pointer to a function is needed as thread specific data,
pthreads assumes that all data can be casted to void*,
and ISO C++ forbids
casting between pointer-to-function and pointer-to-object :-(
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