The meeting discussed the implementation of a big integer type and the challenges of coroutine frame allocators. Vinnie proposed using thread-local storage (TLS) to propagate allocators without polluting function signatures. The group debated the merits of TLS versus global variables, noting that TLS may not be available on all platforms. A poll indicated strong support for further work on propagating frame allocators outside function parameters. Vinnie also mentioned the development of a new networking library, Corosio, as a potential replacement for ASIO, aiming for better performance and ease of use.

Action Items

• Make Brian a co-host on future Zoom calls (ensure Brian has co-host privileges for room control and polling)
• VF Submit the coroutine frame allocator paper for the April mailing (finalize and send the draft to the mailing)
• VF Continue working on the coroutine frame allocator / ambient propagation problem and prepare follow-up materials to return to the group

Outline

Discussion on Online Ballot and Vote Results

• Michael Wong explains the dilemma of the online ballot and national body poll vote taking three months to complete.
• The vote results will not be known until after the Bruno meeting, preventing discussions on C Plus Plus 26.
• Michael Wong opens the floor for questions about general logistics and C directions.
• Brian  is asked to chair the rest of the call while Michael Wong listens to Vinnie's presentation.

Vinnie's Presentation on Coroutine Frame Allocator Timing Problem

• Vinnie introduces the coroutine frame allocator timing problem and its impact on performance.
• Vinnie explains the baseline solution and the need for a better solution to avoid signature pollution.
• Vinnie proposes a two-phase solution involving a trampoline for launching coroutines and invoking the coroutine function to create the task.
• Discussion on the ambient solution, including the use of global and thread-local variables to propagate the allocator.

Debate on Thread-Local and Ambient Solutions

• Michael Wong and other participants discuss the trade-offs of using thread-local and ambient solutions.
• Concerns about the reliability of thread-local on certain platforms are raised.
• Vinnie explains the importance of maintaining a data structure to associate the thread with its allocator.
• The group agrees on the need to keep the thread-local solution flexible and platform-specific.

Feedback and Poll on Allocator Propagation

• Participants discuss the importance of avoiding allocator signature pollution in coroutines.
• A poll is conducted to gauge the group's support for further work on propagating frame allocators through coroutine chains.
• The poll results show strong support for encouraging more work in this area.10-4-0-0-0
• Vinnie thanks the group and mentions his ongoing work on the networking library, Corosio.