wait_cycles.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
 * Concesso in licenza secondo i termini della Licenza Apache, versione 2.0
 * (la "Licenza"); è proibito usare questo file se non in conformità alla
 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
 * "COSÌ COM'È", SENZA GARANZIE O CONDIZIONI DI ALCUN TIPO, esplicite o
 * implicite. Consultare la Licenza per il testo specifico che regola le
 * autorizzazioni e le limitazioni previste dalla medesima.
 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

void wait_cycles( Environment * _environment, int _timing, int _parallel ) {
 
    if ( _environment->protothread && _parallel ) {
 
        if ( ! _environment->procedureName ) {
            CRITICAL_WAIT_CYCLES_PARALLEL_CANNOT_BE_CALLED_OUTSIDE_PROCEDURE();
        }
 
        if ( _environment->protothreadForbid ) {
            CRITICAL_MULTITASKING_FORBIDDEN();
        }
 
        char waitVariableName[MAX_TEMPORARY_STORAGE]; sprintf(waitVariableName, "%swaitms%d", _environment->procedureName, _environment->protothreadStep );

        memset( ((struct _Environment *)_environment)->arrayDimensionsEach, 0, sizeof( int ) * MAX_ARRAY_DIMENSIONS );
        ((struct _Environment *)_environment)->arrayDimensionsEach[0] = _environment->protothreadConfig.count;
        ((struct _Environment *)_environment)->arrayDimensions = 1;
        variable_define( _environment, waitVariableName, VT_TARRAY, 0 );
        variable_array_type( _environment, waitVariableName, VT_WORD );
 
        variable_store_array_const( _environment, waitVariableName, _timing );
 
        yield( _environment );
 
        char protothreadLabel[MAX_TEMPORARY_STORAGE]; sprintf(protothreadLabel, "%spt%d", _environment->procedureName, _environment->protothreadStep );
        
        variable_decrement_mt( _environment, waitVariableName );
        Variable * result = variable_temporary( _environment, VT_WORD, "(temporary)" );
        variable_move_from_mt( _environment, waitVariableName, result->name );
        variable_compare_and_branch_const( _environment, result->name, 0,  protothreadLabel, 1 );
 
        cpu_protothread_save( _environment, "PROTOTHREADCT", ( _environment->protothreadStep - 1 ) );
        cpu_protothread_set_state( _environment, "PROTOTHREADCT", PROTOTHREAD_STATUS_YIELDED );
        cpu_return( _environment );
 
        cpu_label( _environment, protothreadLabel );
        cpu_protothread_set_state( _environment, "PROTOTHREADCT", PROTOTHREAD_STATUS_RUNNING );
 
        ++_environment->protothreadStep;
 
    } else {
 
        char timingString[MAX_TEMPORARY_STORAGE]; sprintf(timingString, "#$%2.2x", _timing );
 
        cpu_busy_wait( _environment, timingString );
 
    }
 
}

void wait_cycles_var( Environment * _environment, char * _timing, int _parallel ) {
 
    Variable * timing = variable_retrieve( _environment, _timing );
 
    if ( _environment->protothread && _environment->procedureName && _parallel) {
 
        if ( _environment->protothreadForbid ) {
            CRITICAL_MULTITASKING_FORBIDDEN();
        }
 
        char waitVariableName[MAX_TEMPORARY_STORAGE]; sprintf(waitVariableName, "%swaitms%d", _environment->procedureName, _environment->protothreadStep );

        memset( ((struct _Environment *)_environment)->arrayDimensionsEach, 0, sizeof( int ) * MAX_ARRAY_DIMENSIONS );
        ((struct _Environment *)_environment)->arrayDimensionsEach[0] = _environment->protothreadConfig.count;
        ((struct _Environment *)_environment)->arrayDimensions = 1;
        variable_define( _environment, waitVariableName, VT_TARRAY, 0 );
        variable_array_type( _environment, waitVariableName, VT_WORD );
 
        variable_move_to_mt( _environment, _timing, waitVariableName );
 
        yield( _environment );
 
        char protothreadLabel[MAX_TEMPORARY_STORAGE]; sprintf(protothreadLabel, "%spt%d", _environment->procedureName, _environment->protothreadStep );
        
        variable_decrement_mt( _environment, waitVariableName );
        Variable * result = variable_temporary( _environment, VT_WORD, "(temporary)" );
        variable_move_from_mt( _environment, waitVariableName, result->name );
        variable_compare_and_branch_const( _environment, result->name, 0,  protothreadLabel, 1 );
 
        cpu_protothread_save( _environment, "PROTOTHREADCT", ( _environment->protothreadStep - 1 ) );
        cpu_protothread_set_state( _environment, "PROTOTHREADCT", PROTOTHREAD_STATUS_YIELDED );
        cpu_return( _environment );
 
        cpu_label( _environment, protothreadLabel );
        cpu_protothread_set_state( _environment, "PROTOTHREADCT", PROTOTHREAD_STATUS_RUNNING );
 
        ++_environment->protothreadStep;
 
 
    } else {
 
        cpu_busy_wait( _environment, timing->realName );
 
    }
 
}