并发环境下真正的无锁编程:Software transactional memory

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http://en.wikipedia.org/wiki/Software_transactional_memory


In computer science, software transactional memory (STM) is a concurrency control mechanism analogous to database transactions for controlling access to shared memory in concurrent computing. It is an alternative to lock-based synchronization. A transaction in this context is a piece of code that executes a series of reads and writes to shared memory. These reads and writes logically occur at a single instance in time; intermediate states are not visible to other (successful) transactions. The idea of providing hardware support for transactions originated in a 1986 paper by Tom Knight.[1] The idea was popularized by Maurice Herlihy and J. Eliot B. Moss.[2] In 1995 Nir Shavit and Dan Touitou extended this idea to software-only transactional memory (STM).[3] STM has recently[when?] been the focus of intense research and support for practical implementations is growing.

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