On Sunday, 31 August 2025 at 12:44:33 UTC, Brother Bill wrote:
FWIW, given that D supports Message Passing Concurrency, is Data Sharing Concurrency just there for D completeness, for those that want to live close to the iron.
Speaking as a guy who did Unix kernel SMP for years, there are times when you just need shared memory, spinlocks, atomic lock->semaphore transitions, atomic operations (increment, compare/exchange, etc.). D has all of'em, and I made sure they worked when I was first looking at D.
It would seem that Message Passing Concurrency should be our first, second and third choice for concurrency.
Indeed. As the Golang folks have also noted, message passing is almost inevitably a more productive and less error prone way to coordinate parallel threads. If, some day, you find your parallel app dying under the overhead of all the messaging--you can keep shared memory programming in mind as a possible alternative.
Andy
