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/*
BLIS
An object-based framework for developing high-performance BLAS-like
libraries.
Copyright (C) 2014, The University of Texas at Austin
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- 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.
- Neither the name(s) of the copyright holder(s) 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 THE COPYRIGHT
HOLDER OR CONTRIBUTORS 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.
*/
#ifndef BLIS_THRCOMM_SINGLE_H
#define BLIS_THRCOMM_SINGLE_H
// Define thrcomm_t for situations when multithreading is disabled.
#ifndef BLIS_ENABLE_MULTITHREADING
//thread communicators may be implementation dependent
#ifdef BLIS_TREE_BARRIER
struct barrier_s
{
int arity;
int count;
struct barrier_s* dad;
int signal;
};
typedef struct barrier_s barrier_t;
struct thrcomm_s
{
void* sent_object;
dim_t n_threads;
barrier_t** barriers;
};
#else
struct thrcomm_s
{
void* sent_object;
dim_t n_threads;
// NOTE: barrier_sense was originally a gint_t-based bool_t, but upon
// redefining bool_t as bool we discovered that some gcc __atomic built-ins
// don't allow the use of bool for the variables being operated upon.
// (Specifically, this was observed of __atomic_fetch_xor(), but it likely
// applies to all other related built-ins.) Thus, we get around this by
// redefining barrier_sense as a gint_t.
gint_t barrier_sense;
dim_t barrier_threads_arrived;
};
#endif
typedef struct thrcomm_s thrcomm_t;
#endif
#endif
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