diff options
Diffstat (limited to '')
| -rw-r--r-- | src/doc/rust-by-example/src/std_misc/threads/testcase_mapreduce.md | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/doc/rust-by-example/src/std_misc/threads/testcase_mapreduce.md b/src/doc/rust-by-example/src/std_misc/threads/testcase_mapreduce.md index 28075164f..ee25b1661 100644 --- a/src/doc/rust-by-example/src/std_misc/threads/testcase_mapreduce.md +++ b/src/doc/rust-by-example/src/std_misc/threads/testcase_mapreduce.md @@ -17,9 +17,11 @@ its tiny block of digits, and subsequently we will sum the intermediate sums pro thread. Note that, although we're passing references across thread boundaries, Rust understands that we're -only passing read-only references, and that thus no unsafety or data races can occur. Because -we're `move`-ing the data segments into the thread, Rust will also ensure the data is kept alive -until the threads exit, so no dangling pointers occur. +only passing read-only references, and that thus no unsafety or data races can occur. Also because +the references we're passing have `'static` lifetimes, Rust understands that our data won't be +destroyed while these threads are still running. (When you need to share non-`static` data between +threads, you can use a smart pointer like `Arc` to keep the data alive and avoid non-`static` +lifetimes.) ```rust,editable use std::thread; |