On Tuesday, 16 May 2017 08:10:56 UTC+3, Yan Tang wrote: > > Hi, > > I am aware of golang map is not safe for concurrent access, especially > when there is at least one writer. > > However, I want to know that if the map has been pre-populated, and > different coroutines access (read/write) different key/value pair, is it > safe to do so? There is no deletion or adding keys after the > initialization. > > I think it should be safe (having been doing this in C++ quite frequently) > but just want to double check. >
In Go use `-race` to test safety. (https://blog.golang.org/race-detector) In C++ use `thread-sanitizer` to test safety. (https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual) Given the description, it's not safe in Go... and AFAIK, it isn't safe in C++ either. See https://software.intel.com/en-us/blogs/2013/01/06/benign-data-races-what-could-possibly-go-wrong for more information. + Egon -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
