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/*
*
* Copyright 2015 gRPC authors.
*
* 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.
*
*/
#ifndef GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H
#define GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H
#include <grpc/support/port_platform.h>
#include "src/core/lib/iomgr/pollset.h"
#include "src/core/lib/iomgr/pollset_set.h"
typedef enum grpc_pollset_tag {
GRPC_POLLS_NONE,
GRPC_POLLS_POLLSET,
GRPC_POLLS_POLLSET_SET
} grpc_pollset_tag;
/* A grpc_polling_entity is a pollset-or-pollset_set container. It allows
* functions that accept a pollset XOR a pollset_set to do so through an
* abstract interface. No ownership is taken. */
struct grpc_polling_entity {
union {
grpc_pollset* pollset = nullptr;
grpc_pollset_set* pollset_set;
} pollent;
grpc_pollset_tag tag = GRPC_POLLS_NONE;
};
grpc_polling_entity grpc_polling_entity_create_from_pollset_set(
grpc_pollset_set* pollset_set);
grpc_polling_entity grpc_polling_entity_create_from_pollset(
grpc_pollset* pollset);
/** If \a pollent contains a pollset, return it. Otherwise, return NULL */
grpc_pollset* grpc_polling_entity_pollset(grpc_polling_entity* pollent);
/** If \a pollent contains a pollset_set, return it. Otherwise, return NULL */
grpc_pollset_set* grpc_polling_entity_pollset_set(grpc_polling_entity* pollent);
bool grpc_polling_entity_is_empty(const grpc_polling_entity* pollent);
/** Add the pollset or pollset_set in \a pollent to the destination pollset_set
* \a * pss_dst */
void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent,
grpc_pollset_set* pss_dst);
/** Delete the pollset or pollset_set in \a pollent from the destination
* pollset_set \a * pss_dst */
void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent,
grpc_pollset_set* pss_dst);
#endif /* GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H */
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