The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
 
 
 
 
 
 

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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPC_TEST_CORE_UTIL_PORT_H
#define GRPC_TEST_CORE_UTIL_PORT_H
#ifdef __cplusplus
extern "C" {
#endif
/* pick a port number that is currently unused by either tcp or udp. return
0 on failure. */
int grpc_pick_unused_port(void);
/* pick a port number that is currently unused by either tcp or udp. abort
on failure. */
int grpc_pick_unused_port_or_die(void);
/* Return a port which was previously returned by grpc_pick_unused_port().
* Implementations of grpc_pick_unused_port() backed by a portserver may limit
* the total number of ports available; this lets a binary return its allocated
* ports back to the server if it is going to allocate a large number. */
void grpc_recycle_unused_port(int port);
#ifdef __cplusplus
}
#endif
#endif /* GRPC_TEST_CORE_UTIL_PORT_H */