| Kea 3.0.2-git

interprocess_util.cc
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1// Copyright (C) 2013-2025 Internet Systems Consortium, Inc. ("ISC")
2//
3// This Source Code Form is subject to the terms of the Mozilla Public
4// License, v. 2.0. If a copy of the MPL was not distributed with this
5// file, You can obtain one at http://mozilla.org/MPL/2.0/.
6
7#include <config.h>
8
9#include <gtest/gtest.h>
10
11#include <sys/select.h>
12#include <cstddef>
13
14 namespace isc {
15 namespace util {
16 namespace unittests {
17
18 unsigned char
19 parentReadState(int fd) {
20 unsigned char result = 0xff;
21
22 fd_set rfds;
23 FD_ZERO(&rfds);
24 FD_SET(fd, &rfds);
25
26 struct timeval tv = {5, 0};
27
28 const int nfds = select(fd + 1, &rfds, NULL, NULL, &tv);
29 EXPECT_EQ(1, nfds);
30
31 if (nfds == 1) {
32 // Read status
33 const ssize_t bytes_read = read(fd, &result, sizeof(result));
34 EXPECT_EQ(static_cast<ssize_t>(sizeof(result)), bytes_read);
35 }
36
37 return (result);
38}
39
40}
41}
42}
isc::util::unittests
Definition check_valgrind.cc:11
isc::util::unittests::parentReadState
unsigned char parentReadState(int fd)
A helper utility for a simple synchronization with another process.
Definition interprocess_util.cc:19
isc::util
Definition time_utils.cc:43
isc
Defines the logger used by the top-level component of kea-lfc.
Definition agent_parser.cc:148