rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Rewrite section on concurrency

Browse Source
This commit is contained in:
Gabriel Majeri
2018-09-28 10:59:45 +03:00
parent bcec6bb525
commit 7e921aa590
1 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/libstd/sync/mod.rs
View File

@@ -57,16 +57,17 @@
//! as the final optimized code, when executed, produces the same results as the one
//! without optimizations.
//!
//! When multiprocessing is involved (either multiple CPU cores, or multiple
//! physical CPUs), access to global variables (which are shared between threads)
//! could lead to nondeterministic results, **even if** compiler optimizations
//! are disabled.
//! Due to the [concurrency] involved in modern computers, assumptions about
//! the program's execution order are often wrong. Access to global variables
//! can lead to nondeterministic results, **even if** compiler optimizations
//! are disabled, and it is **still possible** to introduce synchronization bugs.
//!
//! Note that thanks to Rust's safety guarantees, accessing global (static)
//! variables requires `unsafe` code, assuming we don't use any of the
//! synchronization primitives in this module.
//!
//! [constant folding]: https://en.wikipedia.org/wiki/Constant_folding
//! [concurrency]: https://en.wikipedia.org/wiki/Concurrency_(computer_science)
//!
//! ## Out-of-order execution
//!