65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/*
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Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "my_config.h"
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#include <stdio.h>
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#include <assert.h>
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#include "config.h"
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#include "atomics.h"
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#include "all_tests.h"
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Uint32 engine_cas_hi = 0x717530;
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atomic_int32_t engine_cas_lo = 0xb0000065;
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void worker_set_cas(int verbose, Uint64 *cas);
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int test_cas_bitshifts(QueryPlan *, Ndb *, int v) {
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Uint64 cas = 0ULL;
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worker_set_cas(v, &cas);
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require(cas == 0x00717530B0000065ULL);
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worker_set_cas(v, &cas);
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worker_set_cas(v, &cas);
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worker_set_cas(v, &cas);
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worker_set_cas(v, &cas);
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worker_set_cas(v, &cas);
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require(cas == 31935524339974250ULL);
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pass;
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}
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void worker_set_cas(int verbose, Uint64 *cas) {
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bool did_inc;
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Uint32 cas_lo;
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Uint32 & cas_hi = engine_cas_hi;
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do {
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cas_lo = engine_cas_lo;
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did_inc = atomic_cmp_swap_int(& engine_cas_lo, cas_lo, cas_lo + 1);
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} while(! did_inc);
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*cas = Uint64(cas_lo) | (Uint64(cas_hi) << 32);
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detail(verbose, "%llu \n", (unsigned long long) *cas);
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}
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