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Rewrite section on concurrency

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Gabriel Majeri
2018-09-28 10:59:45 +03:00
parent bcec6bb525
commit 7e921aa590
1 changed files with 5 additions and 4 deletions
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9
src/libstd/sync/mod.rs
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@@ -57,16 +57,17 @@
//! as the final optimized code, when executed, produces the same results as the one //! as the final optimized code, when executed, produces the same results as the one
//! without optimizations. //! without optimizations.
//! //!
//! When multiprocessing is involved (either multiple CPU cores, or multiple //! Due to the [concurrency] involved in modern computers, assumptions about
//! physical CPUs), access to global variables (which are shared between threads) //! the program's execution order are often wrong. Access to global variables
//! could lead to nondeterministic results, **even if** compiler optimizations //! can lead to nondeterministic results, **even if** compiler optimizations
//! are disabled. //! are disabled, and it is **still possible** to introduce synchronization bugs.
//! //!
//! Note that thanks to Rust's safety guarantees, accessing global (static) //! Note that thanks to Rust's safety guarantees, accessing global (static)
//! variables requires `unsafe` code, assuming we don't use any of the //! variables requires `unsafe` code, assuming we don't use any of the
//! synchronization primitives in this module. //! synchronization primitives in this module.
//! //!
//! [constant folding]: https://en.wikipedia.org/wiki/Constant_folding //! [constant folding]: https://en.wikipedia.org/wiki/Constant_folding
//! [concurrency]: https://en.wikipedia.org/wiki/Concurrency_(computer_science)
//! //!
//! ## Out-of-order execution //! ## Out-of-order execution
//! //!