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/*
** GNU Pth - The GNU Portable Threads
** Copyright (c) 1999-2004 Ralf S. Engelschall <rse@engelschall.com>
**
** This file is part of GNU Pth, a non-preemptive thread scheduling
** library which can be found at http://www.gnu.org/software/pth/.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
** USA, or contact Ralf S. Engelschall <rse@engelschall.com>.
**
** test_misc.c: Pth test program (misc functions)
*/
/* ``Study it forever and you'll still wonder.
Fly it once and you'll know.''
-- Henry Spencer */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "pth.h"
pth_mutex_t mutex = PTH_MUTEX_INIT;
static void *my_reader(void *_arg)
{
char buf[3];
int n;
for (;;) {
n = pth_read(STDIN_FILENO, buf, 1);
if (n < 0) {
fprintf(stderr, "reader: error\n");
break;
}
if (n == 0) {
fprintf(stderr, "reader: EOF\n");
break;
}
if (n == 1 && buf[0] == '\n') {
buf[0] = '\\';
buf[1] = 'n';
n = 2;
}
buf[n] = NUL;
fprintf(stderr, "reader: bytes=%d, char='%s'\n", n, buf);
if (buf[0] == 'Q' || buf[0] == 'q')
break;
if (buf[0] == 'L' || buf[0] == 'l') {
fprintf(stderr, "reader: ACQUIRE MUTEX\n");
pth_mutex_acquire(&mutex, FALSE, NULL);
}
if (buf[0] == 'U' || buf[0] == 'u') {
fprintf(stderr, "reader: RELEASE MUTEX\n");
pth_mutex_release(&mutex);
}
fflush(stderr);
}
return NULL;
}
static void *my_child(void *_arg)
{
int i;
char *name = (char *)_arg;
for (i = 0; i < 10; ++i) {
pth_mutex_acquire(&mutex, FALSE, NULL);
fprintf(stderr, "%s: %d\n", name, i);
pth_mutex_release(&mutex);
pth_usleep(500000);
}
return NULL;
}
int main(int argc, char *argv[])
{
pth_t child[10];
pth_attr_t t_attr;
pth_attr_t t_attr2;
long n;
pth_init();
fprintf(stderr, "This is TEST_MISC, a Pth test using various stuff.\n");
fprintf(stderr, "\n");
fprintf(stderr, "A stdin reader child and various looping childs are\n");
fprintf(stderr, "spawned. When you enter 'l' you can lock a mutex which\n");
fprintf(stderr, "blocks the looping childs. 'u' unlocks this mutex.\n");
fprintf(stderr, "Enter 'q' to quit.\n");
fprintf(stderr, "\n");
fprintf(stderr, "Main Startup (%ld total threads running)\n", pth_ctrl(PTH_CTRL_GETTHREADS));
t_attr = pth_attr_new();
pth_attr_set(t_attr, PTH_ATTR_JOINABLE, FALSE);
pth_attr_set(t_attr, PTH_ATTR_NAME, "foo");
child[0] = pth_spawn(t_attr, my_child, (void *)"foo");
pth_attr_set(t_attr, PTH_ATTR_NAME, "bar");
child[1] = pth_spawn(t_attr, my_child, (void *)"bar");
pth_attr_set(t_attr, PTH_ATTR_NAME, "baz");
child[2] = pth_spawn(t_attr, my_child, (void *)"baz");
pth_attr_set(t_attr, PTH_ATTR_NAME, "quux");
child[3] = pth_spawn(t_attr, my_child, (void *)"quux");
pth_attr_set(t_attr, PTH_ATTR_NAME, "killer");
pth_attr_set(t_attr, PTH_ATTR_PRIO, 4);
child[4] = pth_spawn(t_attr, my_child, (void *)"killer");
pth_attr_set(t_attr, PTH_ATTR_NAME, "killer II");
pth_attr_set(t_attr, PTH_ATTR_PRIO, 5);
child[5] = pth_spawn(t_attr, my_child, (void *)"killer II");
pth_attr_set(t_attr, PTH_ATTR_NAME, "reader");
pth_attr_set(t_attr, PTH_ATTR_PRIO, PTH_PRIO_STD);
child[6] = pth_spawn(t_attr, my_reader, (void *)"reader");
pth_attr_destroy(t_attr);
t_attr2 = pth_attr_of(child[0]);
pth_attr_set(t_attr2, PTH_ATTR_PRIO, -1);
pth_attr_destroy(t_attr2);
t_attr2 = pth_attr_of(child[3]);
pth_attr_set(t_attr2, PTH_ATTR_PRIO, +1);
pth_attr_destroy(t_attr2);
fprintf(stderr, "Main Loop (%ld total threads running)\n", pth_ctrl(PTH_CTRL_GETTHREADS));
while ((n = pth_ctrl(PTH_CTRL_GETTHREADS)) > 1) {
fprintf(stderr, "Main Loop (%ld total threads still running)\n", n);
pth_usleep(500000);
}
fprintf(stderr, "Main Exit (%ld total threads running)\n", pth_ctrl(PTH_CTRL_GETTHREADS));
pth_kill();
return 0;
}
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