2 This source code file is part of thread_mpi.
3 Original for gcc written by Sander Pronk, Erik Lindahl, and possibly
4 others. Modified for the Cray compiler by Daniel Landau.
6 Copyright (c) 2009, Sander Pronk, Erik Lindahl.
7 Copyright 2014, Cray Inc.
10 Redistribution and use in source and binary forms, with or without
11 modification, are permitted provided that the following conditions are met:
12 1) Redistributions of source code must retain the above copyright
13 notice, this list of conditions and the following disclaimer.
14 2) Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
17 3) Neither the name of the copyright holders nor the
18 names of its contributors may be used to endorse or promote products
19 derived from this software without specific prior written permission.
21 THIS SOFTWARE IS PROVIDED BY US ''AS IS'' AND ANY
22 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 DISCLAIMED. IN NO EVENT SHALL WE BE LIABLE FOR ANY
25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
28 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 If you want to redistribute modifications, please consider that
33 scientific software is very special. Version control is crucial -
34 bugs must be traceable. We will be happy to consider code for
35 inclusion in the official distribution, but derived work should not
36 be called official thread_mpi. Details are found in the README & COPYING
40 #include <intrinsics.h>
42 typedef struct tMPI_Spinlock
44 volatile long lock /*__attribute__ ((aligned(64)))*/;
47 #define TMPI_SPINLOCK_INITIALIZER { 0 }
49 #define TMPI_ATOMIC_HAVE_NATIVE_SPINLOCK
53 static inline void tMPI_Spinlock_init(tMPI_Spinlock_t *x)
59 static inline void tMPI_Spinlock_lock(tMPI_Spinlock_t *x)
61 while (__sync_lock_test_and_set(&(x->lock), 1) == 1)
63 /* this is nicer on the system bus: */
71 static inline int tMPI_Spinlock_trylock(tMPI_Spinlock_t *x)
73 return __sync_lock_test_and_set(&(x->lock), 1);
77 static inline void tMPI_Spinlock_unlock(tMPI_Spinlock_t *x)
82 static inline int tMPI_Spinlock_islocked(const tMPI_Spinlock_t *x)
84 return ( x->lock == 1 );
87 static inline void tMPI_Spinlock_wait(tMPI_Spinlock_t *x)