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Fixed a problem with polling for the number of active threads. No longer

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polls. :)
This commit is contained in:
Robert James Kaes 2000-12-08 03:35:07 +00:00
parent 068b0337c5
commit 0051208777
2 changed files with 29 additions and 43 deletions
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64
src/thread.c
View File

@ -1,4 +1,4 @@
/* $Id: thread.c,v 1.1 2000-09-12 00:07:44 rjkaes Exp $
/* $Id: thread.c,v 1.2 2000-12-08 03:35:07 rjkaes Exp $
*
* Handles the creation/destruction of the various threads required for
* processing incoming connections.
@ -39,7 +39,6 @@ struct thread_config_s {
static unsigned int servers_waiting; /* servers waiting for a connection */
static pthread_mutex_t servers_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t servers_cond = PTHREAD_COND_INITIALIZER;
#define LOCK_SERVERS() pthread_mutex_lock(&servers_mutex)
#define UNLOCK_SERVERS() pthread_mutex_unlock(&servers_mutex)
@ -155,50 +154,33 @@ int thread_pool_create(void)
int thread_main_loop(void)
{
int i;
struct timeval tv;
struct timespec ts;
while (config.quit == FALSE) {
/* Wait for one of the threads to signal */
pthread_mutex_lock(&servers_mutex);
while (config.quit == FALSE
&& servers_waiting < thread_config.maxspareservers
&& servers_waiting > thread_config.minspareservers) {
if (gettimeofday(&tv, NULL) < 0) {
return -1;
}
ts.tv_sec = tv.tv_sec + 1;
ts.tv_nsec = tv.tv_usec * 1000;
pthread_cond_timedwait(&servers_cond, &servers_mutex, &ts);
}
/* If there are not enough spare servers, create more */
LOCK_SERVERS();
if (config.quit == TRUE)
return 0;
/* If there are not enough spare servers, create more */
if (servers_waiting < thread_config.minspareservers) {
for (i = 0; i < thread_config.maxclients; i++) {
if (thread_ptr[i].status == T_EMPTY) {
pthread_create(&thread_ptr[i].tid, NULL, &thread_main, &thread_ptr[i]);
thread_ptr[i].status = T_WAITING;
servers_waiting++;
log(LOG_NOTICE, "Created a new thread.");
break;
}
}
} else if (servers_waiting > thread_config.maxspareservers) {
for (i = 0; i < thread_config.maxclients; i++) {
if (thread_ptr[i].status == T_WAITING) {
pthread_join(thread_ptr[i].tid, NULL);
servers_waiting--;
thread_ptr[i].status = T_EMPTY;
log(LOG_NOTICE, "Killed off a thread.");
break;
}
if (servers_waiting < thread_config.minspareservers) {
for (i = 0; i < thread_config.maxclients; i++) {
if (thread_ptr[i].status == T_EMPTY) {
pthread_create(&thread_ptr[i].tid, NULL, &thread_main, &thread_ptr[i]);
thread_ptr[i].status = T_WAITING;
servers_waiting++;
log(LOG_NOTICE, "Created a new thread.");
break;
}
}
} else if (servers_waiting > thread_config.maxspareservers) {
for (i = 0; i < thread_config.maxclients; i++) {
if (thread_ptr[i].status == T_WAITING) {
pthread_join(thread_ptr[i].tid, NULL);
servers_waiting--;
thread_ptr[i].status = T_EMPTY;
log(LOG_NOTICE, "Killed off a thread.");
break;
}
}
pthread_mutex_unlock(&servers_mutex);
}
UNLOCK_SERVERS();
return 0;
}

8
src/tinyproxy.c
View File

@ -1,4 +1,4 @@
/* $Id: tinyproxy.c,v 1.7 2000-11-23 04:46:48 rjkaes Exp $
/* $Id: tinyproxy.c,v 1.8 2000-12-08 03:35:07 rjkaes Exp $
*
* The initialise routine. Basically sets up all the initial stuff (logfile,
* listening socket, config options, etc.) and then sits there and loops
@ -82,6 +82,7 @@ void takesig(int sig)
log(LOG_INFO, "SIGTERM received.");
break;
}
if (sig != SIGTERM)
signal(sig, takesig);
signal(SIGPIPE, SIG_IGN);
@ -326,7 +327,10 @@ int main(int argc, char **argv)
* Start the main loop.
*/
log(LOG_INFO, "Starting main loop. Accepting connections.");
thread_main_loop();
do {
thread_main_loop();
sleep(1);
} while (!config.quit);
log(LOG_INFO, "Shutting down.");
thread_close_sock();