1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H 20 #define GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include "src/core/lib/iomgr/pollset.h" 25 #include "src/core/lib/iomgr/pollset_set.h" 26 27 typedef enum grpc_pollset_tag { 28 GRPC_POLLS_NONE, 29 GRPC_POLLS_POLLSET, 30 GRPC_POLLS_POLLSET_SET 31 } grpc_pollset_tag; 32 33 /* A grpc_polling_entity is a pollset-or-pollset_set container. It allows 34 * functions that accept a pollset XOR a pollset_set to do so through an 35 * abstract interface. No ownership is taken. */ 36 37 typedef struct grpc_polling_entity { 38 union { 39 grpc_pollset* pollset; 40 grpc_pollset_set* pollset_set; 41 } pollent; 42 grpc_pollset_tag tag; 43 } grpc_polling_entity; 44 45 grpc_polling_entity grpc_polling_entity_create_from_pollset_set( 46 grpc_pollset_set* pollset_set); 47 grpc_polling_entity grpc_polling_entity_create_from_pollset( 48 grpc_pollset* pollset); 49 50 /** If \a pollent contains a pollset, return it. Otherwise, return NULL */ 51 grpc_pollset* grpc_polling_entity_pollset(grpc_polling_entity* pollent); 52 53 /** If \a pollent contains a pollset_set, return it. Otherwise, return NULL */ 54 grpc_pollset_set* grpc_polling_entity_pollset_set(grpc_polling_entity* pollent); 55 56 bool grpc_polling_entity_is_empty(const grpc_polling_entity* pollent); 57 58 /** Add the pollset or pollset_set in \a pollent to the destination pollset_set 59 * \a * pss_dst */ 60 void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent, 61 grpc_pollset_set* pss_dst); 62 63 /** Delete the pollset or pollset_set in \a pollent from the destination 64 * pollset_set \a * pss_dst */ 65 void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent, 66 grpc_pollset_set* pss_dst); 67 68 #endif /* GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H */ 69
