Seastar
High performance C++ framework for concurrent servers
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unix_address.hh
1/*
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9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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18/*
19 * Copyright (C) 2019 Red Hat, Inc.
20 */
21#pragma once
22
23#ifndef SEASTAR_MODULE
24#include <iosfwd>
25#include <sys/types.h>
26#include <sys/un.h>
27#include <string>
28#endif
29#include <seastar/util/modules.hh>
30
31namespace seastar {
32SEASTAR_MODULE_EXPORT_BEGIN
44 const std::string name;
45 const int path_count; // either name.length() or name.length()+1. See path_length_aux() below.
46
47 explicit unix_domain_addr(const std::string& fn) : name{fn}, path_count{path_length_aux()} {}
48
49 explicit unix_domain_addr(const char* fn) : name{fn}, path_count{path_length_aux()} {}
50
51 int path_length() const { return path_count; }
52
53 // the following holds:
54 // for abstract name: name.length() == number of meaningful bytes, including the null in name[0].
55 // for filesystem path: name.length() does not count the implicit terminating null.
56 // Here we tweak the outside-visible length of the address.
57 int path_length_aux() const {
58 auto pl = (int)name.length();
59 if (!pl || (name[0] == '\0')) {
60 // unnamed, or abstract-namespace
61 return pl;
62 }
63 return 1 + pl;
64 }
65
66 const char* path_bytes() const { return name.c_str(); }
67
68 bool operator==(const unix_domain_addr& a) const {
69 return name == a.name;
70 }
71 bool operator!=(const unix_domain_addr& a) const {
72 return !(*this == a);
73 }
74};
75
76std::ostream& operator<<(std::ostream&, const unix_domain_addr&);
77SEASTAR_MODULE_EXPORT_END
78} // namespace seastar
Seastar API namespace.
Definition: abort_on_ebadf.hh:26
Definition: unix_address.hh:43