Added slap_op_init/destroy, cache Operation structures

servers/slapd/main.c

@@ -361,6 +361,7 @@ int main( int argc, char **argv )
 
 	extops_init();
 	lutil_passwd_init();
+	slap_op_init();
 
 #ifdef SLAPD_MODULES
 	if ( module_init() != 0 ) {
@@ -587,6 +588,8 @@ destroy:
 	module_kill();
 #endif
 
+	slap_op_destroy();
+
 	extops_kill();
 
 stop:

servers/slapd/operation.c

@@ -18,6 +18,26 @@
 #include "slapi.h"
 #endif
 
+static ldap_pvt_thread_mutex_t	slap_op_mutex;
+static LDAP_STAILQ_HEAD(s_o, slap_op)	slap_free_ops;
+
+void slap_op_init()
+{
+	ldap_pvt_thread_mutex_init( &slap_op_mutex );
+	LDAP_STAILQ_INIT(&slap_free_ops);
+}
+
+void slap_op_destroy()
+{
+	Operation *o;
+
+	while ( (o = LDAP_STAILQ_FIRST( &slap_free_ops )) != NULL) {
+		LDAP_STAILQ_REMOVE_HEAD( &slap_free_ops, o_next );
+		LDAP_STAILQ_NEXT(o, o_next) = NULL;
+		ch_free( o );
+	}
+	ldap_pvt_thread_mutex_destroy( &slap_op_mutex );
+}
 
 void
 slap_op_free( Operation *op )
@@ -62,7 +82,10 @@ slap_op_free( Operation *op )
 	}
 #endif /* defined( LDAP_SLAPI ) */
 
-	free( (char *) op );
+	memset( op, 0, sizeof(Operation) );
+	ldap_pvt_thread_mutex_lock( &slap_op_mutex );
+	LDAP_STAILQ_INSERT_HEAD( &slap_free_ops, op, o_next );
+	ldap_pvt_thread_mutex_unlock( &slap_op_mutex );
 }
 
 Operation *
@@ -75,7 +98,14 @@ slap_op_alloc(
 {
 	Operation	*op;
 
-	op = (Operation *) ch_calloc( 1, sizeof(Operation) );
+	ldap_pvt_thread_mutex_lock( &slap_op_mutex );
+	if (op = LDAP_STAILQ_FIRST( &slap_free_ops )) {
+		LDAP_STAILQ_REMOVE_HEAD( &slap_free_ops, o_next );
+	}
+	ldap_pvt_thread_mutex_unlock( &slap_op_mutex );
+
+	if (!op)
+		op = (Operation *) ch_calloc( 1, sizeof(Operation) );
 
 	op->o_ber = ber;
 	op->o_msgid = msgid;