diff options
Diffstat (limited to 'exercises')
| -rw-r--r-- | exercises/19_smart_pointers/arc1.rs | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/exercises/19_smart_pointers/arc1.rs b/exercises/19_smart_pointers/arc1.rs index c3d714d..6bb860f 100644 --- a/exercises/19_smart_pointers/arc1.rs +++ b/exercises/19_smart_pointers/arc1.rs @@ -1,4 +1,4 @@ -// In this exercise, we are given a `Vec` of u32 called `numbers` with values +// In this exercise, we are given a `Vec` of `u32` called `numbers` with values // ranging from 0 to 99. We would like to use this set of numbers within 8 // different threads simultaneously. Each thread is going to get the sum of // every eighth value with an offset. @@ -9,8 +9,11 @@ // … // The eighth thread (offset 7), will sum 7, 15, 23, … // -// Because we are using threads, our values need to be thread-safe. Therefore, -// we are using `Arc`. +// Each thread should own a reference-counting pointer to the vector of +// numbers. But `Rc` isn't thread-safe. Therefore, we need to use `Arc`. +// +// Don't get distracted by how threads are spawned and joined. We will practice +// that later in the exercises about threads. // Don't change the lines below. #![forbid(unused_imports)] |