2 Commits

Author	SHA1	Message	Date
Ewout van Bekkum	9618d8a770	pw_sync: Adds semaphores & mutexes ... Adds the BinarySemaphore, CountingSemaphore, and Mutex to the pw_sync module along with an STL backend for each. Change-Id: I54a3a64e702202a319ed2c9068bf37412d3fd240 Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/24241 Reviewed-by: Ewout van Bekkum <ewout@google.com> Reviewed-by: Wyatt Hepler <hepler@google.com> Reviewed-by: Keir Mierle <keir@google.com> Commit-Queue: Ewout van Bekkum <ewout@google.com>	2020-12-01 21:28:25 +00:00
Ewout van Bekkum	58901934cd	pw_sync: Adds initial SpinLock primitive ... Adds the first synchronization primitive to Pigweed: the pw::sync::SpinLock with integrated local interrupt masking. This also provides the first backend for the SpinLock facade backed by an STL implementation. Note that signals are considered "NMIs" while spin locks are only supported up to IRQs, ergo no local interrupt/signal masking is done in the STL implementation. Change-Id: I34204835c55e54597077d40665f61715964803f9 Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/25802 Reviewed-by: Ewout van Bekkum <ewout@google.com> Reviewed-by: Wyatt Hepler <hepler@google.com> Reviewed-by: Keir Mierle <keir@google.com> Commit-Queue: Ewout van Bekkum <ewout@google.com>	2020-11-24 19:02:43 +00:00