harfbuzz/test/api/test-multithread.c

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/*
* Copyright © 2018 Ebrahim Byagowi
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <pthread.h>
#include <hb.h>
#include <hb-ft.h>
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#include <hb-ot.h>
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static const char *text = "طرح‌نَما";
static const char *path =
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#if defined(__linux__)
"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf";
#elif defined(__FreeBSD__)
"/usr/local/share/fonts/dejavu/DejaVuSans.ttf";
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#elif defined(_WIN32) || defined(_WIN64)
"C:\\Windows\\Fonts\\tahoma.ttf";
#elif __APPLE__
"/Library/Fonts/Tahoma.ttf";
#endif
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static int num_threads = 30;
static int num_iters = 200;
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static hb_font_t *font;
static hb_buffer_t *ref_buffer;
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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static void
fill_the_buffer (hb_buffer_t *buffer)
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{
hb_buffer_add_utf8 (buffer, text, sizeof (text), 0, sizeof (text));
hb_buffer_guess_segment_properties (buffer);
hb_shape (font, buffer, NULL, 0);
}
static void
validity_check (hb_buffer_t *buffer) {
if (hb_buffer_diff (ref_buffer, buffer, (hb_codepoint_t) -1, 0))
{
fprintf (stderr, "One of the buffers was different from the reference.\n");
char out[255];
hb_buffer_serialize_glyphs (buffer, 0, hb_buffer_get_length (ref_buffer),
out, sizeof (out), NULL,
font, HB_BUFFER_SERIALIZE_FORMAT_TEXT,
HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES);
fprintf (stderr, "Actual: %s\n", out);
hb_buffer_serialize_glyphs (ref_buffer, 0, hb_buffer_get_length (ref_buffer),
out, sizeof (out), NULL,
font, HB_BUFFER_SERIALIZE_FORMAT_TEXT,
HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES);
fprintf (stderr, "Expected: %s\n", out);
exit (1);
}
}
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static void *
thread_func (void *data)
{
hb_buffer_t *buffer = (hb_buffer_t *) data;
pthread_mutex_lock (&mutex);
pthread_mutex_unlock (&mutex);
int i;
for (i = 0; i < num_iters; i++)
{
hb_buffer_clear_contents (buffer);
fill_the_buffer (buffer);
validity_check (buffer);
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}
return 0;
}
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static void
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test_body (void)
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{
int i;
pthread_t *threads = calloc (num_threads, sizeof (pthread_t));
hb_buffer_t **buffers = calloc (num_threads, sizeof (hb_buffer_t *));
pthread_mutex_lock (&mutex);
for (i = 0; i < num_threads; i++)
{
hb_buffer_t *buffer = hb_buffer_create ();
buffers[i] = buffer;
pthread_create (&threads[i], NULL, thread_func, buffer);
}
/* Let them loose! */
pthread_mutex_unlock (&mutex);
for (i = 0; i < num_threads; i++)
{
pthread_join (threads[i], NULL);
hb_buffer_destroy (buffers[i]);
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}
free (buffers);
free (threads);
}
int
main (int argc, char **argv)
{
if (argc > 1)
num_threads = atoi (argv[1]);
if (argc > 2)
num_iters = atoi (argv[2]);
// Dummy call to alleviate _guess_segment_properties thread safety-ness
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// https://github.com/harfbuzz/harfbuzz/issues/1191
hb_language_get_default ();
hb_blob_t *blob = hb_blob_create_from_file (path);
hb_face_t *face = hb_face_create (blob, 0);
font = hb_font_create (face);
hb_ot_font_set_funcs (font);
ref_buffer = hb_buffer_create ();
fill_the_buffer (ref_buffer);
test_body ();
/* hb-font backed by FreeType functions can only be used from
* one thread at a time, because that's FT_Face's MT guarantee.
* So, disable this, even though it works "most of the time". */
//hb_ft_font_set_funcs (font);
//test_body ();
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hb_buffer_destroy (ref_buffer);
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hb_font_destroy (font);
hb_face_destroy (face);
hb_blob_destroy (blob);
return 0;
}