add @lock doc (#50491)

#36441
JuliaLang · Aug 25, 2023 · 451de66 · 451de66
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diff --git a/doc/src/base/parallel.md b/doc/src/base/parallel.md
@@ -50,6 +50,7 @@ Base.unlock
 Base.trylock
 Base.islocked
 Base.ReentrantLock
+Base.@lock
 ```
 
 ## Channels

diff --git a/doc/src/manual/multi-threading.md b/doc/src/manual/multi-threading.md
@@ -165,6 +165,8 @@ julia> begin
                unlock(lk)
            end
        end
+
+julia> @lock lk use(a)
 ```
 where `lk` is a lock (e.g. `ReentrantLock()`) and `a` data.