mirror of https://github.com/ecmwf/eccodes.git
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/*
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* (C) Copyright 2005- ECMWF.
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*
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* This software is licensed under the terms of the Apache Licence Version 2.0
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* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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*
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* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include "grib_api_internal.h"
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#define NUM_THREADS 8
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#define FILES_PER_ITERATION 10
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char* INPUT_FILE = NULL;
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void do_stuff(void* data);
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void* runner(void* ptr); /* the thread function */
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int main(int argc, char** argv)
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{
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long i;
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int thread_counter = 0;
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pthread_t workers[NUM_THREADS];
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INPUT_FILE = argv[1];
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/* Create worker threads */
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for (i = 0; i < NUM_THREADS; i++) {
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/* Now we will create the thread passing it data as a paramater*/
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pthread_create(&workers[thread_counter], NULL, runner, (void*)i);
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thread_counter++;
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}
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/* Waiting for threads to complete */
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for (i = 0; i < NUM_THREADS; i++) {
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pthread_join(workers[i], NULL);
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}
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return 0;
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}
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void* runner(void* ptr)
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{
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do_stuff(ptr);
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pthread_exit(0);
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}
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static int encode_file(char* input_file, char* output_file)
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{
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grib_handle* source_handle = NULL;
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const void* buffer = NULL;
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int err = 0;
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FILE* in = fopen(input_file, "rb");
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FILE* out = fopen(output_file, "wb");
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Assert(in);
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Assert(out);
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while ((source_handle = grib_handle_new_from_file(0, in, &err)) != NULL) {
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size_t size = 0, values_len = 0;
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int i;
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double* values = NULL;
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long count;
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double d, e;
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grib_handle* clone_handle = grib_handle_clone(source_handle);
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Assert(clone_handle);
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GRIB_CHECK(grib_get_size(clone_handle, "values", &values_len), 0);
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values = (double*)malloc(values_len * sizeof(double));
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d = 10e-10;
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e = d;
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count = 1;
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for (i = 0; i < values_len; i++) {
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if (count > 1000) {
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e *= 2;
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count = 1;
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}
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values[i] = d;
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d += e;
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count++;
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}
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GRIB_CHECK(grib_set_long(clone_handle, "bitsPerValue", 16), 0);
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/*GRIB_CHECK(grib_set_string(clone_handle, "packingType", "grid_ccsds", &str_len), 0);*/
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/*GRIB_CHECK(grib_set_string(clone_handle, "packingType", "grid_simple", &str_len), 0);*/
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GRIB_CHECK(grib_set_double_array(clone_handle, "values", values, values_len), 0);
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/* get the coded message in a buffer */
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GRIB_CHECK(grib_get_message(clone_handle, &buffer, &size), 0);
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/* write the buffer to a file */
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if (fwrite(buffer, 1, size, out) != size) {
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perror(output_file);
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return 1;
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}
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grib_handle_delete(clone_handle);
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grib_handle_delete(source_handle);
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free(values);
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}
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fclose(out);
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fclose(in);
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return 0;
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}
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void do_stuff(void* arg)
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{
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long number = (long)arg;
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char output_file[50];
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int i;
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for (i = 0; i < FILES_PER_ITERATION; i++) {
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snprintf(output_file, 50, "temp.grib_encode_pthreads_test.out_%d-%d.grib", (int)number, i);
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encode_file(INPUT_FILE, output_file);
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}
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}
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