These gotos had no effect -- they went to the same place we get to by ending
the conditional block.

Reviewer: none

This fixes the performance regression that was introduced by concatenation of
per-target lists.

Reviewer: goodell

The fence_cnt field in MPID_Win is not a counter, it's a flag that indicates if
fence has been called.

Reviewer: buntinas

This patch adds code to track the RMA epoch state of the local process.
Currently, we are tracking the synchronization states that are allowed by
MPICH; in the future, we may want to restrict this to only states that are
allowed by the standard.  The addition of epoch tracking has several benefits:

 * It allows us to detect synchronization errors (implemented in this patch).
 * It allows us to implement lock_all more efficiently (implemented in this
   patch).
 * It will allow us to distinguish between active and passive target epochs and
   avoid O(p) op list concatenation (future patch).

Reviewer: balaji

Updated get_accumulate implementation to properly handle NO_OP operations;
currently, we dispatch these as get operations.  As a part of this change, the
op issue code was also gathered into a macro to reduce copy-paste across all
of the synchronization functions.

Reviewer: goodell

Reviewer: goodell

The use of a dense array is a temporary measure to support the reference
implementation.  This will be much improved by ticket #1735.

Reviewer: goodell

In this patch, I have refactored the RMA ops list again to use the MPL UTList
doubly-linked list and to treat the list as a proper object.  This should set
us up to work with multiple lists, as we will soon have one list per target.
Doubly-linking the list is a big help in terms of maintainability (no more
prevNext pointers) and flexibility (better implementation of request-based
ops and other optimizations).

Reviewer: goodell

Refactored RMA ops enqueue/dequeue operations into inline functions to reduce
copy/paste code.  Added extra safety checks that will be needed as we renovate
for MPI-3.

Reviewer: goodell

Reviewer: goodell

By setting "indent-tabs-mode:nil" we should hopefully begin to slowly
squeeze out hard tabs from the source without a disruptive (to
downstream projects) whitespace-fixing change.

No reviewer.

No reviewer.

Reviewed by buntinas.

Adds implementation of atomic fetch-and-op operation and several test cases.

Reviewer: buntinas

Reviewer: buntinas

This patch adds support for the new MPI-3 compare-and-swap routine.  The
implementation embeds the data into the packet header to reduce the number of
messages.

Reviewer: buntinas

Pulled bit manipulation arithmetic into macros for converting handles to
indices in MPIR_Op and MPIR_Op_check_dtype function pointer tables.

Reviewer: buntinas

This is an first step in implementing MPI_Get_accumulate.  Currently, only
communication with self is supported.

Reviewer: buntinas