The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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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.
//
//
#include "src/core/lib/iomgr/port.h"
#include <stdio.h>
#include <stdlib.h>
#include <utility>
#include "absl/log/check.h"
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include "src/core/lib/gprpp/sync.h"
#include "test/core/util/port.h"
#include "test/core/util/port_server_client.h"
static int* chosen_ports = nullptr;
static size_t num_chosen_ports = 0;
static grpc_core::Mutex* g_default_port_picker_mu;
static gpr_once g_default_port_picker_init = GPR_ONCE_INIT;
static void init_default_port_picker() {
g_default_port_picker_mu = new grpc_core::Mutex();
}
static int free_chosen_port_locked(int port) {
size_t i;
int found = 0;
size_t found_at = 0;
// Find the port and erase it from the list, then tell the server it can be
// freed.
for (i = 0; i < num_chosen_ports; i++) {
if (chosen_ports[i] == port) {
CHECK_EQ(found, 0);
found = 1;
found_at = i;
}
}
if (found) {
chosen_ports[found_at] = chosen_ports[num_chosen_ports - 1];
num_chosen_ports--;
grpc_free_port_using_server(port);
}
return found;
}
static void free_chosen_ports(void) {
grpc_core::MutexLock lock(g_default_port_picker_mu);
size_t i;
grpc_init();
for (i = 0; i < num_chosen_ports; i++) {
grpc_free_port_using_server(chosen_ports[i]);
}
grpc_shutdown();
gpr_free(chosen_ports);
}
static void chose_port_locked(int port) {
if (chosen_ports == nullptr) {
atexit(free_chosen_ports);
}
num_chosen_ports++;
chosen_ports = static_cast<int*>(
gpr_realloc(chosen_ports, sizeof(int) * num_chosen_ports));
chosen_ports[num_chosen_ports - 1] = port;
}
static int grpc_pick_unused_port_impl(void) {
gpr_once_init(&g_default_port_picker_init, init_default_port_picker);
grpc_core::MutexLock lock(g_default_port_picker_mu);
int port = grpc_pick_port_using_server();
if (port != 0) {
chose_port_locked(port);
}
return port;
}
static int grpc_pick_unused_port_or_die_impl(void) {
int port = grpc_pick_unused_port_impl();
if (port == 0) {
fprintf(stderr,
"gRPC tests require a helper port server to allocate ports used \n"
"during the test.\n\n"
"This server is not currently running.\n\n"
"To start it, run tools/run_tests/start_port_server.py\n\n");
exit(1);
}
return port;
}
static void grpc_recycle_unused_port_impl(int port) {
gpr_once_init(&g_default_port_picker_init, init_default_port_picker);
grpc_core::MutexLock lock(g_default_port_picker_mu);
CHECK(free_chosen_port_locked(port));
}
namespace {
grpc_pick_port_functions& functions() {
static grpc_pick_port_functions* functions = new grpc_pick_port_functions{
grpc_pick_unused_port_or_die_impl, grpc_recycle_unused_port_impl};
return *functions;
}
} // namespace
int grpc_pick_unused_port_or_die(void) {
return functions().pick_unused_port_or_die_fn();
}
void grpc_recycle_unused_port(int port) {
functions().recycle_unused_port_fn(port);
}
grpc_pick_port_functions grpc_set_pick_port_functions(
grpc_pick_port_functions new_functions) {
CHECK_NE(new_functions.pick_unused_port_or_die_fn, nullptr);
CHECK_NE(new_functions.recycle_unused_port_fn, nullptr);
return std::exchange(functions(), new_functions);
}