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45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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cont_util.s - continuations support for Xtensa call0 ABI
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; 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 "cont.h"
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#include <stddef.h>
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#include "ets_sys.h"
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#define CONT_STACKGUARD 0xfeefeffe
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void cont_init(cont_t* cont) {
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cont->stack_guard1 = CONT_STACKGUARD;
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cont->stack_guard2 = CONT_STACKGUARD;
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cont->stack_end = cont->stack + (sizeof(cont->stack) / 4);
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cont->struct_start = (unsigned*) cont;
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}
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int cont_check(cont_t* cont) {
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if(cont->stack_guard1 != CONT_STACKGUARD || cont->stack_guard2 != CONT_STACKGUARD) return 1;
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return 0;
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}
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bool cont_can_yield(cont_t* cont) {
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return !ETS_INTR_WITHINISR() &&
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cont->pc_ret != 0 && cont->pc_yield == 0;
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}
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