Pantyhose-X/tinyproxy
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Implimented the MaxRequestsPerChild directive.

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This commit is contained in:
Robert James Kaes 2000-12-09 02:35:30 +00:00
parent da7a96a2e4
commit d5467e404b
1 changed files with 34 additions and 15 deletions
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49
src/thread.c
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@ -1,4 +1,4 @@
/* $Id: thread.c,v 1.2 2000-12-08 03:35:07 rjkaes Exp $
/* $Id: thread.c,v 1.3 2000-12-09 02:35:30 rjkaes Exp $
*
* Handles the creation/destruction of the various threads required for
* processing incoming connections.
@ -28,6 +28,7 @@ static socklen_t addrlen;
struct thread_s {
pthread_t tid;
enum { T_EMPTY, T_WAITING, T_CONNECTED } status;
unsigned int connects;
};
static struct thread_s *thread_ptr;
static pthread_mutex_t mlock = PTHREAD_MUTEX_INITIALIZER;
@ -40,8 +41,17 @@ struct thread_config_s {
static unsigned int servers_waiting; /* servers waiting for a connection */
static pthread_mutex_t servers_mutex = PTHREAD_MUTEX_INITIALIZER;
#define LOCK_SERVERS() pthread_mutex_lock(&servers_mutex)
#define UNLOCK_SERVERS() pthread_mutex_unlock(&servers_mutex)
#define SERVER_INC() do { \
pthread_mutex_lock(&servers_mutex); \
servers_waiting++; \
pthread_mutex_unlock(&servers_mutex); \
} while (0)
#define SERVER_DEC() do { \
pthread_mutex_lock(&servers_mutex); \
servers_waiting--; \
pthread_mutex_unlock(&servers_mutex); \
} while (0)
/*
* Set the configuration values for the various thread related settings.
@ -96,18 +106,25 @@ static void *thread_main(void *arg)
connfd = accept(listenfd, cliaddr, &clilen);
pthread_mutex_unlock(&mlock);
LOCK_SERVERS();
ptr->status = T_CONNECTED;
servers_waiting--;
UNLOCK_SERVERS();
SERVER_DEC();
handle_connection(connfd);
close(connfd);
LOCK_SERVERS();
ptr->status = T_WAITING;
servers_waiting++;
UNLOCK_SERVERS();
if (thread_config.maxrequestsperchild != 0)
ptr->connects++;
if (ptr->connects > thread_config.maxrequestsperchild) {
ptr->connects = 0;
ptr->status = T_EMPTY;
return NULL;
} else {
ptr->status = T_WAITING;
SERVER_INC();
}
}
}
/*
@ -142,6 +159,7 @@ int thread_pool_create(void)
}
for (i = thread_config.startservers; i < thread_config.maxclients; i++) {
thread_ptr[i].status = T_EMPTY;
thread_ptr[i].connects = 0;
}
return 0;
@ -156,14 +174,14 @@ int thread_main_loop(void)
int i;
/* If there are not enough spare servers, create more */
LOCK_SERVERS();
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++;
SERVER_INC();
log(LOG_NOTICE, "Created a new thread.");
break;
}
@ -172,7 +190,9 @@ int thread_main_loop(void)
for (i = 0; i < thread_config.maxclients; i++) {
if (thread_ptr[i].status == T_WAITING) {
pthread_join(thread_ptr[i].tid, NULL);
servers_waiting--;
SERVER_DEC();
thread_ptr[i].status = T_EMPTY;
log(LOG_NOTICE, "Killed off a thread.");
break;
@ -180,7 +200,6 @@ int thread_main_loop(void)
}
}
UNLOCK_SERVERS();
return 0;
}