Retro68/gcc/libcilkrts/runtime/pedigrees.c

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2014-09-21 17:33:12 +00:00
/* pedigrees.c -*-C-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2007-2013, Intel Corporation
* All rights reserved.
*
* @copyright
* 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 of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* 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 "pedigrees.h"
#include "local_state.h"
/*************************************************************
Pedigree API code.
*************************************************************/
/*
* C99 requires that every inline function with external linkage have one
* extern declaration in the program (with the inline definition in scope).
*/
COMMON_PORTABLE
extern void update_pedigree_on_leave_frame(__cilkrts_worker *w,
__cilkrts_stack_frame *sf);
void __cilkrts_set_pedigree_leaf(__cilkrts_pedigree *leaf)
{
__cilkrts_set_tls_pedigree_leaf(leaf);
}
void load_pedigree_leaf_into_user_worker(__cilkrts_worker *w)
{
__cilkrts_pedigree *pedigree_leaf;
CILK_ASSERT(w->l->type == WORKER_USER);
pedigree_leaf = __cilkrts_get_tls_pedigree_leaf(1);
w->pedigree = *pedigree_leaf;
// Save a pointer to the old leaf.
// We'll need to restore it later.
CILK_ASSERT(w->l->original_pedigree_leaf == NULL);
w->l->original_pedigree_leaf = pedigree_leaf;
__cilkrts_set_tls_pedigree_leaf(&w->pedigree);
// Check that this new pedigree root has at least two values.
CILK_ASSERT(w->pedigree.parent);
CILK_ASSERT(w->pedigree.parent->parent == NULL);
}
void save_pedigree_leaf_from_user_worker(__cilkrts_worker *w)
{
CILK_ASSERT(w->l->type == WORKER_USER);
// Existing leaf in tls should be for the current worker.
// This assert is expensive to check though.
// CILK_ASSERT(&w->pedigree == __cilkrts_get_tls_pedigree_leaf(0));
CILK_ASSERT(w->l->original_pedigree_leaf);
// w should finish with a pedigree node that points to
// the same root that we just looked up.
// TODO: This assert should be valid.
// But we are removing it now to make exceptions (without pedigrees) work.
// Currently, reading the pedigree after an exception is caught
// fails because the pedigree chain not restored correctly.
// CILK_ASSERT(w->l->original_pedigree_leaf->next == w->pedigree.parent);
w->l->original_pedigree_leaf->rank = w->pedigree.rank;
// Save that leaf pointer back into tls.
__cilkrts_set_tls_pedigree_leaf(w->l->original_pedigree_leaf);
// Null out worker's leaf for paranoia.
w->l->original_pedigree_leaf = NULL;
}
/*
Local Variables: **
c-file-style:"bsd" **
c-basic-offset:4 **
indent-tabs-mode:nil **
End: **
*/