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/*
Copyright (c) 2012, Monty Program Ab
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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/*
This file does standalone APC system tests.
*/
#include <my_global.h>
#include <my_pthread.h>
#include <my_sys.h>
#include <stdio.h>
#include <tap.h>
/*
A fake THD with enter_cond/exit_cond and some other members.
*/
PSI_stage_info stage_show_explain;
class THD
{
mysql_mutex_t* thd_mutex;
public:
bool killed;
THD() : killed(FALSE) {}
inline const char* ENTER_COND(mysql_cond_t *cond, mysql_mutex_t* mutex,
PSI_stage_info*, PSI_stage_info*)
{
mysql_mutex_assert_owner(mutex);
thd_mutex= mutex;
return NULL;
}
inline void EXIT_COND(PSI_stage_info*)
{
mysql_mutex_unlock(thd_mutex);
}
};
#include "../sql/my_apc.h"
#define MY_APC_STANDALONE 1
#include "../sql/my_apc.cc"
volatile bool started= FALSE;
volatile bool service_should_exit= FALSE;
volatile bool requestors_should_exit=FALSE;
/* Counters for APC calls */
int apcs_served= 0;
int apcs_missed=0;
int apcs_timed_out=0;
mysql_mutex_t apc_counters_mutex;
inline void increment_counter(int *var)
{
mysql_mutex_lock(&apc_counters_mutex);
*var= *var+1;
mysql_mutex_unlock(&apc_counters_mutex);
}
volatile bool have_errors= false;
Apc_target apc_target;
mysql_mutex_t target_mutex;
int int_rand(int size)
{
return (int) (0.5 + ((double)rand() / RAND_MAX) * size);
}
/*
APC target thread (the one that will serve the APC requests). We will have
one target.
*/
void *test_apc_service_thread(void *ptr)
{
my_thread_init();
mysql_mutex_init(0, &target_mutex, MY_MUTEX_INIT_FAST);
apc_target.init(&target_mutex);
apc_target.enable();
started= TRUE;
diag("test_apc_service_thread started");
while (!service_should_exit)
{
//apc_target.disable();
my_sleep(10000);
//apc_target.enable();
for (int i = 0; i < 10 && !service_should_exit; i++)
{
apc_target.process_apc_requests();
my_sleep(int_rand(30));
}
}
apc_target.disable();
apc_target.destroy();
mysql_mutex_destroy(&target_mutex);
my_thread_end();
pthread_exit(0);
return NULL;
}
/*
One APC request (to write 'value' into *where_to)
*/
class Apc_order : public Apc_target::Apc_call
{
public:
int value; // The value
int *where_to; // Where to write it
Apc_order(int a, int *b) : value(a), where_to(b) {}
void call_in_target_thread()
{
my_sleep(int_rand(1000));
*where_to = value;
increment_counter(&apcs_served);
}
};
/*
APC requestor thread. It makes APC requests, and checks if they were actually
executed.
*/
void *test_apc_requestor_thread(void *ptr)
{
my_thread_init();
diag("test_apc_requestor_thread started");
THD my_thd;
while (!requestors_should_exit)
{
int dst_value= 0;
int src_value= int_rand(4*1000*100);
/* Create an APC to do "dst_value= src_value" assignment */
Apc_order apc_order(src_value, &dst_value);
bool timed_out;
mysql_mutex_lock(&target_mutex);
bool res= apc_target.make_apc_call(&my_thd, &apc_order, 60, &timed_out);
if (res)
{
if (timed_out)
increment_counter(&apcs_timed_out);
else
increment_counter(&apcs_missed);
if (dst_value != 0)
{
diag("APC was done even though return value says it wasnt!");
have_errors= true;
}
}
else
{
if (dst_value != src_value)
{
diag("APC was not done even though return value says it was!");
have_errors= true;
}
}
//my_sleep(300);
}
diag("test_apc_requestor_thread exiting");
my_thread_end();
return NULL;
}
/* Number of APC requestor threads */
const int N_THREADS=23;
int main(int args, char **argv)
{
pthread_t service_thr;
pthread_t request_thr[N_THREADS];
int i;
my_thread_global_init();
mysql_mutex_init(0, &apc_counters_mutex, MY_MUTEX_INIT_FAST);
plan(1);
diag("Testing APC delivery and execution");
pthread_create(&service_thr, NULL, test_apc_service_thread, (void*)NULL);
while (!started)
my_sleep(1000);
for (i = 0; i < N_THREADS; i++)
pthread_create(&request_thr[i], NULL, test_apc_requestor_thread, (void*)NULL);
for (i = 0; i < 15; i++)
{
my_sleep(500*1000);
diag("%d APCs served %d missed", apcs_served, apcs_missed);
}
diag("Shutting down requestors");
requestors_should_exit= TRUE;
for (i = 0; i < N_THREADS; i++)
pthread_join(request_thr[i], NULL);
diag("Shutting down service");
service_should_exit= TRUE;
pthread_join(service_thr, NULL);
mysql_mutex_destroy(&apc_counters_mutex);
diag("Done");
my_thread_end();
my_thread_global_end();
ok1(!have_errors);
return exit_status();
}
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