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/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2010-2013 Couchbase, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "internal.h"
#include <lcbio/iotable.h>
#include <lcbio/timer-ng.h>
static int
has_pending(lcb_t instance)
{
unsigned ii;
if (!lcb_retryq_empty(instance->retryq)) {
return 1;
}
if (lcb_aspend_pending(&instance->pendops)) {
return 1;
}
for (ii = 0; ii < LCBT_NSERVERS(instance); ii++) {
mc_SERVER *ss = LCBT_GET_SERVER(instance, ii);
if (mcserver_has_pending(ss)) {
return 1;
}
}
return 0;
}
static void
maybe_reset_timeouts(lcb_t instance)
{
size_t ii;
lcb_U64 now;
if (!LCBT_SETTING(instance, readj_ts_wait)) {
return;
}
now = lcb_nstime();
for (ii = 0; ii < LCBT_NSERVERS(instance); ++ii) {
mc_SERVER *ss = LCBT_GET_SERVER(instance, ii);
mcreq_reset_timeouts(&ss->pipeline, now);
}
lcb_retryq_reset_timeouts(instance->retryq, now);
}
void
lcb_maybe_breakout(lcb_t instance)
{
if (!instance->wait) {
return;
}
if (has_pending(instance)) {
return;
}
instance->wait = 0;
instance->iotable->loop.stop(IOT_ARG(instance->iotable));
}
/**
* Returns non zero if the event loop is running now
*
* @param instance the instance to run the event loop for.
*/
LIBCOUCHBASE_API
int lcb_is_waiting(lcb_t instance)
{
return instance->wait != 0;
}
/**
* Run the event loop until we've got a response for all of our spooled
* commands. You should not call this function from within your callbacks.
*
* @param instance the instance to run the event loop for.
*
* @author Trond Norbye
*/
LIBCOUCHBASE_API
lcb_error_t lcb_wait(lcb_t instance)
{
if (instance->wait != 0) {
return instance->last_error;
}
if (!has_pending(instance)) {
return LCB_SUCCESS;
}
maybe_reset_timeouts(instance);
instance->last_error = LCB_SUCCESS;
instance->wait = 1;
IOT_START(instance->iotable);
instance->wait = 0;
if (LCBT_VBCONFIG(instance)) {
return LCB_SUCCESS;
}
return instance->last_error;
}
LIBCOUCHBASE_API
lcb_error_t lcb_tick_nowait(lcb_t instance)
{
lcb_io_tick_fn tick = instance->iotable->loop.tick;
if (!tick) {
return LCB_CLIENT_FEATURE_UNAVAILABLE;
} else {
maybe_reset_timeouts(instance);
tick(IOT_ARG(instance->iotable));
return LCB_SUCCESS;
}
}
LIBCOUCHBASE_API
void lcb_wait3(lcb_t instance, lcb_WAITFLAGS flags)
{
if (flags == LCB_WAIT_DEFAULT) {
if (instance->wait) {
return;
}
if (has_pending(instance)) {
return;
}
}
maybe_reset_timeouts(instance);
instance->wait = 1;
IOT_START(instance->iotable);
instance->wait = 0;
}
/**
* Stop event loop
*
* @param instance the instance to run the event loop for.
*/
LIBCOUCHBASE_API
void lcb_breakout(lcb_t instance)
{
if (instance->wait) {
IOT_STOP(instance->iotable);
instance->wait = 0;
}
}