4 commits

Author	SHA1	Message	Date
Witold Kręcicki	493b6a9f33	Make hazard pointers max_threads configurable at runtime. ... hp implementation requires an object for each thread accessing a hazard pointer. previous implementation had a hardcoded HP_MAX_THREAD value of 128, which failed on machines with lots of CPU cores (named uses 3n threads). We make isc__hp_max_threads configurable at startup, with the value set to 4*named_g_cpus. It's also important for this value not to be too big as we do linear searches on a list.	2020-01-14 21:26:57 +01:00
Ondřej Surý	01731d4b1b	Add and use ISC_THREAD_LOCAL macro ... The new ISC_THREAD_LOCAL macro unifies usage of platform dependent Thread Local Storage definition thread_local vs __thread vs __declspec(thread) to a single macro. The commit also unifies the required level of support for TLS as for some parts of the code it was mandatory and for some parts of the code it wasn't.	2019-12-03 16:27:24 +01:00
Ondřej Surý	c5b18d3dcb	Use ATOMIC_VAR_INIT to initialize tid_v_base to 0	2019-11-28 12:06:10 +01:00
Witold Kręcicki	aa57fa7090	implement hazard pointer data structure ... this is a mechanism to allow safe lock-free data structures.	2019-11-07 11:55:37 -08:00