Retro68/gcc/libcilkrts/runtime/pedigrees.c
2017-10-07 02:16:47 +02:00

124 lines
4.8 KiB
C

/* pedigrees.c -*-C-*-
*
*************************************************************************
*
* Copyright (C) 2007-2016, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
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* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* *********************************************************************
*
* PLEASE NOTE: This file is a downstream copy of a file mainitained in
* a repository at cilkplus.org. Changes made to this file that are not
* submitted through the contribution process detailed at
* http://www.cilkplus.org/submit-cilk-contribution will be lost the next
* time that a new version is released. Changes only submitted to the
* GNU compiler collection or posted to the git repository at
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* not tracked.
*
* We welcome your contributions to this open source project. Thank you
* for your assistance in helping us improve Cilk Plus.
*
**************************************************************************/
#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: **
*/