Module `rtm`

Intel's Restricted Transactional Memory (RTM).

This CPU feature is available on Intel Broadwell or later CPUs (and some Haswell).

The reference is Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2: Instruction Set Reference, A-Z.

Wikipedia provides a quick overview of the assembly instructions, and Intel's programming considerations details what sorts of instructions within a transaction are likely to cause an abort.

Functions

_xabort Forces a restricted transactional memory (RTM) region to abort.
_xabort_code Retrieves the parameter passed to _xabort when _xbegin's status has the _XABORT_EXPLICIT flag set.
_xbegin Specifies the start of a restricted transactional memory (RTM) code region and returns a value indicating status.
_xend Specifies the end of a restricted transactional memory (RTM) code region.
_xtest Queries whether the processor is executing in a transactional region identified by restricted transactional memory (RTM) or hardware lock elision (HLE).
x86_xabort
x86_xbegin
x86_xend
x86_xtest

Constants

_XABORT_CAPACITY Transaction abort due to the transaction using too much memory.
_XABORT_CONFLICT Transaction abort due to a memory conflict with another thread.
_XABORT_DEBUG Transaction abort due to a debug trap.
_XABORT_EXPLICIT Transaction explicitly aborted with xabort. The parameter passed to xabort is available with _xabort_code(status).
_XABORT_NESTED Transaction abort in a inner nested transaction.
_XABORT_RETRY Transaction retry is possible.
_XBEGIN_STARTED Transaction successfully started.