rust/src/libstd/sync, branch 1.46.0

Rollup merge of #73104 - poliorcetics:explicit-mutex-drop-example, r=dtolnay

2020-06-15T10:01:07+00:00

Example about explicit mutex dropping Fixes #67457. Following the remarks made in #73074, I added an example on the main `Mutex` type, with a situation where there is mutable data and a computation result. In my testing it is effectively needed to explicitly drop the lock, else it deadlocks. r? @dtolnay because you were the one to review the previous PR.

Rewrap comments in Mutex example

2020-06-13T17:11:02+00:00

Clarify the scope-related explanation

2020-06-13T16:43:37+00:00

Based on the review made by dtolnay.

Apply suggestions from code review

2020-06-13T16:41:01+00:00

Co-authored-by: David Tolnay

Migrate to numeric associated consts

2020-06-10T01:35:47+00:00

Remove a lot of unecessary/duplicated comments

2020-06-09T20:40:30+00:00

Simply use drop instead of std::mem::drop

2020-06-08T14:29:47+00:00

Co-authored-by: LeSeulArtichaut

Improved the example to work with mutable data, providing a reason for the mutex holding it

2020-06-07T21:42:55+00:00

Added an example where explicitly dropping a lock is necessary/a good idea.

2020-06-07T21:36:07+00:00

Bump to 1.46

2020-06-03T19:27:51+00:00