3 Commits

Author	SHA1	Message	Date
Mike Ash	dd6c235a2d	[Runtime] Use os_unfair_lock for Mutex and StaticMutex on Darwin. ... os_unfair_lock is much smaller than pthread_mutex_t (4 bytes versus 64) and a bit faster. However, it doesn't support condition variables. Most of our uses of Mutex don't use condition variables, but a few do. Introduce ConditionMutex and StaticConditionMutex, which allow condition variables and continue to use pthread_mutex_t. On all other platforms, we continue to use the same backing mutex type for both Mutex and ConditionMutex. rdar://problem/45412121	2020-11-06 13:05:37 -05:00
Kuba (Brecka) Mracek	ea6cae658e	Make waiting on condition variables error out on SWIFT_STDLIB_SINGLE_THREADED_RUNTIME (#33788)	2020-09-03 18:44:47 -07:00
Kuba (Brecka) Mracek	9ead8d57fa	Add a single-threaded stdlib mode, use it for the 'minimal' stdlib (#33437)	2020-08-25 06:03:14 -07:00