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gen-casefold-txt.pl and gen-casemap-txt.pl are licensed under GPLv2+, so they are not touched by this commit. A lot of *.c files in tests/ don't have a license header. https://bugzilla.gnome.org/show_bug.cgi?id=776504
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/* test for gslice cross thread allocation/free
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* Copyright (C) 2006 Stefan Westerfeld
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* Copyright (C) 2007 Tim Janik
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*
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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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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include <glib.h>
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#include <stdlib.h>
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#ifdef G_OS_UNIX
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#include <unistd.h>
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#endif
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#define N_THREADS 8
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#define N_ALLOCS 50000
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#define MAX_BLOCK_SIZE 64
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struct ThreadData
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{
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int thread_id;
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GThread* gthread;
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GMutex to_free_mutex;
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void* to_free [N_THREADS * N_ALLOCS];
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int bytes_to_free [N_THREADS * N_ALLOCS];
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int n_to_free;
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int n_freed;
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} tdata[N_THREADS];
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static void *
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thread_func (void *arg)
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{
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struct ThreadData *td = arg;
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int i;
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/* g_print ("Thread %d starting\n", td->thread_id); */
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for (i = 0; i < N_ALLOCS; i++)
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{
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int bytes;
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char *mem;
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int f;
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int t;
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if (rand() % (N_ALLOCS / 20) == 0)
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g_print ("%c", 'a' - 1 + td->thread_id);
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/* allocate block of random size and randomly fill */
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bytes = rand() % MAX_BLOCK_SIZE + 1;
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mem = g_slice_alloc (bytes);
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for (f = 0; f < bytes; f++)
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mem[f] = rand();
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/* associate block with random thread */
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t = rand() % N_THREADS;
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g_mutex_lock (&tdata[t].to_free_mutex);
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tdata[t].to_free[tdata[t].n_to_free] = mem;
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tdata[t].bytes_to_free[tdata[t].n_to_free] = bytes;
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tdata[t].n_to_free++;
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g_mutex_unlock (&tdata[t].to_free_mutex);
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/* shuffle thread execution order every once in a while */
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if (rand() % 97 == 0)
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{
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if (rand() % 2)
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g_thread_yield(); /* concurrent shuffling for single core */
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else
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g_usleep (1000); /* concurrent shuffling for multi core */
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}
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/* free a block associated with this thread */
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g_mutex_lock (&td->to_free_mutex);
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if (td->n_to_free > 0)
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{
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td->n_to_free--;
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g_slice_free1 (td->bytes_to_free[td->n_to_free], td->to_free[td->n_to_free]);
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td->n_freed++;
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}
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g_mutex_unlock (&td->to_free_mutex);
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}
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return NULL;
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}
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int
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main (void)
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{
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int t;
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for (t = 0; t < N_THREADS; t++)
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{
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tdata[t].thread_id = t + 1;
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tdata[t].n_to_free = 0;
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tdata[t].n_freed = 0;
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}
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g_print ("Starting %d threads for concurrent GSlice usage...\n", N_THREADS);
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for (t = 0; t < N_THREADS; t++)
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{
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tdata[t].gthread = g_thread_create (thread_func, &tdata[t], TRUE, NULL);
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g_assert (tdata[t].gthread != NULL);
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}
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for (t = 0; t < N_THREADS; t++)
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{
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g_thread_join (tdata[t].gthread);
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}
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g_print ("\n");
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for (t = 0; t < N_THREADS; t++)
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{
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g_print ("Thread %d: %d blocks freed, %d blocks not freed\n",
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tdata[t].thread_id, tdata[t].n_freed, tdata[t].n_to_free);
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}
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return 0;
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}
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