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_TEST_CORE_UTIL_PORT_H 20 #define GRPC_TEST_CORE_UTIL_PORT_H 21 22 typedef struct grpc_pick_port_functions { 23 int (*pick_unused_port_or_die_fn)(void); 24 void (*recycle_unused_port_fn)(int port); 25 } grpc_pick_port_functions; 26 27 // pick a port number that is currently unused by either tcp or udp. abort 28 // on failure. 29 int grpc_pick_unused_port_or_die(void); 30 31 // Return a port which was previously returned by grpc_pick_unused_port(). 32 // Implementations of grpc_pick_unused_port() backed by a portserver may limit 33 // the total number of ports available; this lets a binary return its allocated 34 // ports back to the server if it is going to allocate a large number. 35 void grpc_recycle_unused_port(int port); 36 37 /// Request the family of pick_port functions in \a functions be used. 38 /// Returns the current set so they can be restored later. 39 grpc_pick_port_functions grpc_set_pick_port_functions( 40 grpc_pick_port_functions functions); 41 42 #endif // GRPC_TEST_CORE_UTIL_PORT_H 43