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

Subject: Re: [Boost-users] this_thread::get_id() never returns occasionally
From: Peter Dimov (pdimov_at_[hidden])
Date: 2010-09-21 08:42:18

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).