Re: [Boost-users] this_thread::get_id() never returns occasionally

Samuel Williams wrote:

Hi,

I'm running boost on an iPhone 3G compiled with the official 3.2 SDK on a regular iPhone (i.e. not jailbroken).

Sometimes I get a strange situation where calling this_thread::get_id() never returns.

#0 scoped_lock [inlined] () at spinlock_gcc_arm.hpp:45 #1 boost::detail::spinlock::lock () at boost_1_44_0/boost/smart_ptr/detail/spinlock_pool.hpp:41 #2 boost::detail::sp_counted_base::weak_add_ref () at spinlock_gcc_arm.hpp:61 #3 atomic_increment [inlined] () at boost_1_44_0/boost/smart_ptr/detail/sp_counted_base_spin.hpp:364

This can happen if some of your files that use shared_ptr are compiled for Thumb and some are not (the implementation is different because ARM in Thumb mode has no swp instruction).