/usr/include/gromacs/thread_mpi.h is in gromacs-dev 4.6.5-1build1.
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This source code file is part of thread_mpi.
Written by Sander Pronk, Erik Lindahl, and possibly others.
Copyright (c) 2009, Sander Pronk, Erik Lindahl.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1) Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2) Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3) Neither the name of the copyright holders nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY US ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL WE BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
If you want to redistribute modifications, please consider that
scientific software is very special. Version control is crucial -
bugs must be traceable. We will be happy to consider code for
inclusion in the official distribution, but derived work should not
be called official thread_mpi. Details are found in the README & COPYING
files.
*/
/*
thread_mpi is a cross-platform threading library for applications in
high-performance computing. It supports:
- Cross-platform thread primitives (thread creation, mutexes, spinlocks,
barriers, thread-local storage, etc.).
- Cross-platform atomic operations (compare-and-swap, add-return, etc) for
safe lock-free synchronization.
- An implementation of (currently, much of) MPI, either as a drop-in
replacement, or for use in conjunction with a networked MPI
implementation.
- Shared-memory allocation and memory management (planned, as of now).
- Basic lock-free data structures (planned, as of now).
Because it can be used as a drop-in replacement for MPI, existing codes
using MPI can start using thread_mpi without major changes in the
source code, assuming -- and this is a big assumption -- that the code
is thread-safe.
Alternatively, networked MPI calls can be used in conjunction with
thread_mpi calls (simply by using
"#include <thread_mpi.h>"
instead of
"#include <tmpi.h>"
and pre-fixing all thread_mpi MPI-like calls with tMPI instead of MPI.
The availability of both MPI calls and shared-memory constructs makes it
possible to transition (relatively) seamlessly from an MPI-style code
to code that's optimal on multicore CPUs.
Although MPI-style message passing isn't neccesarily optimal for
performance on shared-memory systems, the MPI communicator concept and
its emphasis on collective operations makes sense even when computing on
one machine with multiple cores. The communicator forms the basis for
the shared-memory allocation and lock-free data structure implementations
in thread_mpi.
Although usable as a stand-alone library, thread_mpi is designed to
be incorporated in the code tree, eliminating any external build
requirements. The BSD-style license that this library is distributed
with reflects this.
The atomic operations (such as compare-and-swap) are supported on:
- gcc on x86, x86_64, PowerPC and Itanium.
- Intel compilers on x86, x86_64 and Itanium.
- xlc on PowerPC.
- (partial) HP/UX compilers on Itanium.
*/
/** \file
*
* \brief Convenience header file for non-MPI compatibility.
*
* This file includes the tMPI header file thread_mpi/tmpi.h, as well
* as thread_mpi/threads.h and thread_mpi/atomic.h header files. If you'd
* like to use the components individually, include the relevant header
* files directly.
*/
#include "thread_mpi/atomic.h"
#include "thread_mpi/threads.h"
#include "thread_mpi/numa_malloc.h"
#include "thread_mpi/barrier.h"
#include "thread_mpi/event.h"
#include "thread_mpi/lock.h"
#include "thread_mpi/tmpi.h"
#include "thread_mpi/collective.h"
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