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| -rw-r--r-- | doc/go_faq.html | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/go_faq.html b/doc/go_faq.html index c038bc46bd..f273688705 100644 --- a/doc/go_faq.html +++ b/doc/go_faq.html @@ -479,6 +479,15 @@ as when hosting an untrusted program, the implementation could interlock map access. </p> +<p> +Map access is unsafe only when updates are occurring. +As long as all goroutines are only reading—looking up elements in the map, +including iterating through it using a +<code>for</code> <code>range</code> loop—and not changing the map +by assigning to elements or doing deletions, +it is safe for them to access the map concurrently without synchronization. +</p> + <h3 id="language_changes"> Will you accept my language change?</h3> |