Re: [Boost-users] lockfree : getting a move only type into spsc_queue
On 07/23/2016 11:36 PM, Thomas Novotny wrote:
In the end Imade a custom version of spsc_queue. Getting this working (as a hack) was fairly easy, so I wanted to share it in the hope that a better solution might make it into a future version of the library.
FYI, there is a pull request about adding move support to spsc_queue, but the consequences have not been fully examined yet: https://github.com/boostorg/lockfree/pull/24 In the meanwhile, you can make a cleaner solution with a unique_ptr specialization of spsc_queue. See attachment.
bool push( T & t, T * buffer, size_t max_size )
T&& t
On 24.07.2016 13:04, Bjorn Reese wrote:
On 07/23/2016 11:36 PM, Thomas Novotny wrote:
In the end Imade a custom version of spsc_queue. Getting this working (as a hack) was fairly easy, so I wanted to share it in the hope that a better solution might make it into a future version of the library.
FYI, there is a pull request about adding move support to spsc_queue, but the consequences have not been fully examined yet:
That is good news, but unfortunately this doesn't work for me because it does not support moving out. I still get a compile error for the pop (attempting to reference a deleted function) size_t pop (T * output_buffer, size_t output_count, T * internal_buffer, size_t max_size) ... copy_and_delete(...) because it copies.
In the meanwhile, you can make a cleaner solution with a unique_ptr specialization of spsc_queue. See attachment.
bool push( T & t, T * buffer, size_t max_size )
T&& t
While your solution is undoubtedly much cleaner, it also does not work for me because my move only type does not expose the underlying unique_ptr. In particular it does not have a release or any comparable mechanism because of the custom deleter. Still, its an interesting option to have.
participants (2)
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Bjorn Reese -
Thomas Novotny