Grcov report - pthread-show-text.c

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/*

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 * Copyright © 2005 Red Hat, Inc.

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 * Permission to use, copy, modify, distribute, and sell this software

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 * and its documentation for any purpose is hereby granted without

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 * fee, provided that the above copyright notice appear in all copies

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 * and that both that copyright notice and this permission notice

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 * appear in supporting documentation, and that the name of

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 * Red Hat, Inc. not be used in advertising or publicity pertaining to

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 * distribution of the software without specific, written prior

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 * permission. Red Hat, Inc. makes no representations about the

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 * suitability of this software for any purpose.  It is provided "as

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 * is" without express or implied warranty.

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 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

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 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

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 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,

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 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER

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 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

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 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR

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 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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 * Author: Carl D. Worth <cworth@cworth.org>

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*/

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/* Test case for bug #4299:

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   Assertion fails in "cairo-font.c" when using multithreads

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   https://bugs.freedesktop.org/show_bug.cgi?id=4299

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*/

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#include "cairo-test.h"

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#include <string.h>

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#include <stdlib.h>

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#include <pthread.h>

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#define N_THREADS 8

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#define NUM_ITERATIONS 40

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#define WIDTH 400

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#define HEIGHT 42

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typedef struct {

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  cairo_surface_t *target;

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  int id;

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} thread_data_t;

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static void *

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draw_thread (void *arg)

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    const char *text = "Hello world. ";

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    thread_data_t *thread_data = arg;

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    cairo_surface_t *surface;

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    cairo_font_extents_t extents;

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    cairo_t *cr;

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    int i;

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    cr = cairo_create (thread_data->target);

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    cairo_surface_destroy (thread_data->target);

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    cairo_set_source_rgb (cr, 1, 1, 1);

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    cairo_paint (cr);

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    cairo_set_source_rgb (cr, 0, 0, 0);

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    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Serif",

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			    CAIRO_FONT_SLANT_NORMAL,

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			    CAIRO_FONT_WEIGHT_NORMAL);

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    cairo_set_font_size (cr, NUM_ITERATIONS);

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    cairo_font_extents (cr, &extents);

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    cairo_move_to (cr, 1, HEIGHT - extents.descent - 1);

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    for (i = 0; i < NUM_ITERATIONS; i++) {

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	char buf[2];

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	cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Serif",

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				CAIRO_FONT_SLANT_NORMAL,

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				CAIRO_FONT_WEIGHT_NORMAL);

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	cairo_set_font_size (cr, i);

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	buf[0] = text[i%strlen(text)];

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	buf[1] = '\0';

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	cairo_show_text (cr, buf);

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    surface = cairo_surface_reference (cairo_get_target (cr));

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    cairo_destroy (cr);

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    return surface;

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static cairo_test_status_t

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3

draw (cairo_t *cr, int width, int height)

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    pthread_t threads[N_THREADS];

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    thread_data_t thread_data[N_THREADS];

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3

    cairo_test_status_t test_status = CAIRO_TEST_SUCCESS;

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    int i;

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    for (i = 0; i < N_THREADS; i++) {

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        thread_data[i].target = cairo_surface_create_similar (cairo_get_target (cr),

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							      cairo_surface_get_content (cairo_get_target (cr)),

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							      WIDTH, HEIGHT);

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        thread_data[i].id = i;

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        if (pthread_create (&threads[i], NULL, draw_thread, &thread_data[i]) != 0) {

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	    threads[i] = pthread_self (); /* to indicate error */

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            cairo_surface_destroy (thread_data[i].target);

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            test_status = CAIRO_TEST_FAILURE;

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	    break;

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3

    cairo_set_source_rgb (cr, 0.5, 0.5, 0.5);

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    cairo_paint (cr);

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    for (i = 0; i < N_THREADS; i++) {

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	void *surface;

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        if (pthread_equal (threads[i], pthread_self ()))

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            break;

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        if (pthread_join (threads[i], &surface) == 0) {

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	    cairo_set_source_surface (cr, surface, 0, 0);

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	    cairo_surface_destroy (surface);

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	    cairo_paint (cr);

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	    cairo_translate (cr, 0, HEIGHT);

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	} else {

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            test_status = CAIRO_TEST_FAILURE;

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    return test_status;

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CAIRO_TEST (pthread_show_text,

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	    "Concurrent stress test of the cairo_show_text().",

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	    "thread, text", /* keywords */

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	    NULL, /* requirements */

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	    WIDTH, HEIGHT * N_THREADS,

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	    NULL, draw)