Userspace RCU 0.5.3

liburcu is a LGPLv2.1 userspace RCU (read-copy-update) library. This data synchronization library provides read-side access which scales linearly with the number of cores. It does so by allowing multiples copies of a given data structure to live at the same time, and by monitoring the data structure accesses to detect grace periods after which memory reclamation is possible.

Changelog for v0.5.3:
* Add support for older ARM single-CPU architecturess (pre-ARMv7) (thanks to Jason Wessel from WindRiver).
* Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
* Remove leftover list_t type from urcu/list.h (namespace cleanup).
* urcu_defer: handle malloc error value.
* Update README file to describe urcu interaction with fork() when not followed by an exec() system call.

Project website: http://lttng.org/urcu
Download link: http://www.lttng.org/files/urcu/

Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com