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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
Copyright (C) 2018 - 2019, Advanced Micro Devices, Inc.
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.
*/
#include "blis.h"
#ifdef BLIS_ENABLE_PTHREADS
thrcomm_t* bli_thrcomm_create( rntm_t* rntm, dim_t n_threads )
{
#ifdef BLIS_ENABLE_MEM_TRACING
printf( "bli_thrcomm_create(): " );
#endif
thrcomm_t* comm = bli_sba_acquire( rntm, sizeof(thrcomm_t) );
bli_thrcomm_init( n_threads, comm );
return comm;
}
void bli_thrcomm_free( rntm_t* rntm, thrcomm_t* comm )
{
if ( comm == NULL ) return;
bli_thrcomm_cleanup( comm );
#ifdef BLIS_ENABLE_MEM_TRACING
printf( "bli_thrcomm_free(): " );
#endif
bli_sba_release( rntm, comm );
}
#ifdef BLIS_USE_PTHREAD_BARRIER
void bli_thrcomm_init( dim_t n_threads, thrcomm_t* comm )
{
if ( comm == NULL ) return;
comm->sent_object = NULL;
comm->n_threads = n_threads;
bli_pthread_barrier_init( &comm->barrier, NULL, n_threads );
}
void bli_thrcomm_cleanup( thrcomm_t* comm )
{
if ( comm == NULL ) return;
bli_pthread_barrier_destroy( &comm->barrier );
}
void bli_thrcomm_barrier( dim_t t_id, thrcomm_t* comm )
{
bli_pthread_barrier_wait( &comm->barrier );
}
#else
void bli_thrcomm_init( dim_t n_threads, thrcomm_t* comm )
{
if ( comm == NULL ) return;
comm->sent_object = NULL;
comm->n_threads = n_threads;
comm->barrier_sense = 0;
comm->barrier_threads_arrived = 0;
}
void bli_thrcomm_cleanup( thrcomm_t* comm )
{
}
void bli_thrcomm_barrier( dim_t t_id, thrcomm_t* comm )
{
#if 0
if ( comm == NULL || comm->n_threads == 1 ) return;
bool my_sense = comm->sense;
dim_t my_threads_arrived;
my_threads_arrived = __sync_add_and_fetch(&(comm->threads_arrived), 1);
if ( my_threads_arrived == comm->n_threads )
{
comm->threads_arrived = 0;
comm->sense = !comm->sense;
}
else
{
volatile bool* listener = &comm->sense;
while( *listener == my_sense ) {}
}
#endif
bli_thrcomm_barrier_atomic( t_id, comm );
}
#endif
#endif
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