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pjproject/pjlib/src/pjlib-test/thread.c

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/* $Id$ */
/*
* Copyright (C)2003-2006 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "test.h"
/**
* \page page_pjlib_thread_test Test: Thread Test
*
* This file contains \a thread_test() definition.
*
* \section thread_test_scope_sec Scope of Test
* This tests:
* - whether PJ_THREAD_SUSPENDED flag works.
* - whether multithreading works.
* - whether thread timeslicing works, and threads have equal
* time-slice proportion.
*
* APIs tested:
* - pj_thread_create()
* - pj_thread_register()
* - pj_thread_this()
* - pj_thread_get_name()
* - pj_thread_destroy()
* - pj_thread_resume()
* - pj_thread_sleep()
* - pj_thread_join()
* - pj_thread_destroy()
*
*
* This file is <b>pjlib-test/thread.c</b>
*
* \include pjlib-test/thread.c
*/
#if INCLUDE_THREAD_TEST
#include <pjlib.h>
#define THIS_FILE "thread_test"
static volatile int quit_flag=0;
#if 0
# define TRACE__(args) PJ_LOG(3,args)
#else
# define TRACE__(args)
#endif
/*
* The thread's entry point.
*
* Each of the thread mainly will just execute the loop which
* increments a variable.
*/
static void* thread_proc(pj_uint32_t *pcounter)
{
/* Test that pj_thread_register() works. */
pj_thread_desc desc;
pj_thread_t *this_thread;
unsigned id = *pcounter;
pj_status_t rc;
TRACE__((THIS_FILE, " thread %d running..", id));
rc = pj_thread_register("thread", desc, &this_thread);
if (rc != PJ_SUCCESS) {
app_perror("...error in pj_thread_register", rc);
return NULL;
}
/* Test that pj_thread_this() works */
this_thread = pj_thread_this();
if (this_thread == NULL) {
PJ_LOG(3,(THIS_FILE, "...error: pj_thread_this() returns NULL!"));
return NULL;
}
/* Test that pj_thread_get_name() works */
if (pj_thread_get_name(this_thread) == NULL) {
PJ_LOG(3,(THIS_FILE, "...error: pj_thread_get_name() returns NULL!"));
return NULL;
}
/* Main loop */
for (;!quit_flag;) {
(*pcounter)++;
//Must sleep if platform doesn't do time-slicing.
//pj_thread_sleep(0);
}
TRACE__((THIS_FILE, " thread %d quitting..", id));
return NULL;
}
/*
* simple_thread()
*/
static int simple_thread(const char *title, unsigned flags)
{
pj_pool_t *pool;
pj_thread_t *thread;
pj_status_t rc;
pj_uint32_t counter = 0;
PJ_LOG(3,(THIS_FILE, "..%s", title));
pool = pj_pool_create(mem, NULL, 4000, 4000, NULL);
if (!pool)
return -1000;
quit_flag = 0;
TRACE__((THIS_FILE, " Creating thread 0.."));
rc = pj_thread_create(pool, "thread", (pj_thread_proc*)&thread_proc,
&counter,
PJ_THREAD_DEFAULT_STACK_SIZE,
flags,
&thread);
if (rc != PJ_SUCCESS) {
app_perror("...error: unable to create thread", rc);
return -1010;
}
TRACE__((THIS_FILE, " Main thread waiting.."));
pj_thread_sleep(1500);
TRACE__((THIS_FILE, " Main thread resuming.."));
if (flags & PJ_THREAD_SUSPENDED) {
/* Check that counter is still zero */
if (counter != 0) {
PJ_LOG(3,(THIS_FILE, "...error: thread is not suspended"));
return -1015;
}
rc = pj_thread_resume(thread);
if (rc != PJ_SUCCESS) {
app_perror("...error: resume thread error", rc);
return -1020;
}
}
PJ_LOG(3,(THIS_FILE, "..waiting for thread to quit.."));
pj_thread_sleep(1500);
quit_flag = 1;
pj_thread_join(thread);
pj_pool_release(pool);
if (counter == 0) {
PJ_LOG(3,(THIS_FILE, "...error: thread is not running"));
return -1025;
}
PJ_LOG(3,(THIS_FILE, "...%s success", title));
return PJ_SUCCESS;
}
/*
* timeslice_test()
*/
static int timeslice_test(void)
{
enum { NUM_THREADS = 4 };
pj_pool_t *pool;
pj_uint32_t counter[NUM_THREADS], lowest, highest, diff;
pj_thread_t *thread[NUM_THREADS];
int i;
pj_status_t rc;
quit_flag = 0;
pool = pj_pool_create(mem, NULL, 4000, 4000, NULL);
if (!pool)
return -10;
PJ_LOG(3,(THIS_FILE, "..timeslice testing with %d threads", NUM_THREADS));
/* Create all threads in suspended mode. */
for (i=0; i<NUM_THREADS; ++i) {
counter[i] = i;
rc = pj_thread_create(pool, "thread", (pj_thread_proc*)&thread_proc,
&counter[i],
PJ_THREAD_DEFAULT_STACK_SIZE,
PJ_THREAD_SUSPENDED,
&thread[i]);
if (rc!=PJ_SUCCESS) {
app_perror("...ERROR in pj_thread_create()", rc);
return -20;
}
}
/* Sleep for 1 second.
* The purpose of this is to test whether all threads are suspended.
*/
TRACE__((THIS_FILE, " Main thread waiting.."));
pj_thread_sleep(1000);
TRACE__((THIS_FILE, " Main thread resuming.."));
/* Check that all counters are still zero. */
for (i=0; i<NUM_THREADS; ++i) {
if (counter[i] > i) {
PJ_LOG(3,(THIS_FILE, "....ERROR! Thread %d-th is not suspended!",
i));
return -30;
}
}
/* Now resume all threads. */
for (i=0; i<NUM_THREADS; ++i) {
TRACE__((THIS_FILE, " Resuming thread %d [%p]..", i, thread[i]));
rc = pj_thread_resume(thread[i]);
if (rc != PJ_SUCCESS) {
app_perror("...ERROR in pj_thread_resume()", rc);
return -40;
}
}
/* Main thread sleeps for some time to allow threads to run.
* The longer we sleep, the more accurate the calculation will be,
* but it'll make user waits for longer for the test to finish.
*/
TRACE__((THIS_FILE, " Main thread waiting (5s).."));
pj_thread_sleep(5000);
TRACE__((THIS_FILE, " Main thread resuming.."));
/* Signal all threads to quit. */
quit_flag = 1;
/* Wait until all threads quit, then destroy. */
for (i=0; i<NUM_THREADS; ++i) {
TRACE__((THIS_FILE, " Main thread joining thread %d [%p]..",
i, thread[i]));
rc = pj_thread_join(thread[i]);
if (rc != PJ_SUCCESS) {
app_perror("...ERROR in pj_thread_join()", rc);
return -50;
}
TRACE__((THIS_FILE, " Destroying thread %d [%p]..", i, thread[i]));
rc = pj_thread_destroy(thread[i]);
if (rc != PJ_SUCCESS) {
app_perror("...ERROR in pj_thread_destroy()", rc);
return -60;
}
}
TRACE__((THIS_FILE, " Main thread calculating time slices.."));
/* Now examine the value of the counters.
* Check that all threads had equal proportion of processing.
*/
lowest = 0xFFFFFFFF;
highest = 0;
for (i=0; i<NUM_THREADS; ++i) {
if (counter[i] < lowest)
lowest = counter[i];
if (counter[i] > highest)
highest = counter[i];
}
/* Check that all threads are running. */
if (lowest < 2) {
PJ_LOG(3,(THIS_FILE, "...ERROR: not all threads were running!"));
return -70;
}
/* The difference between lowest and higest should be lower than 50%.
*/
diff = (highest-lowest)*100 / ((highest+lowest)/2);
if ( diff >= 50) {
PJ_LOG(3,(THIS_FILE,
"...ERROR: thread didn't have equal timeslice!"));
PJ_LOG(3,(THIS_FILE,
".....lowest counter=%u, highest counter=%u, diff=%u%%",
lowest, highest, diff));
return -80;
} else {
PJ_LOG(3,(THIS_FILE,
"...info: timeslice diff between lowest & highest=%u%%",
diff));
}
pj_pool_release(pool);
return 0;
}
int thread_test(void)
{
int rc;
rc = simple_thread("simple thread test", 0);
if (rc != PJ_SUCCESS)
return rc;
rc = simple_thread("suspended thread test", PJ_THREAD_SUSPENDED);
if (rc != PJ_SUCCESS)
return rc;
rc = timeslice_test();
if (rc != PJ_SUCCESS)
return rc;
return rc;
}
#else
/* To prevent warning about "translation unit is empty"
* when this test is disabled.
*/
int dummy_thread_test;
#endif /* INCLUDE_THREAD_TEST */
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