Index/include / boost / corosio / native / detail / posix / large_file.hpp

include/boost/corosio/native/detail/posix/large_file.hpp

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large_file.hpp
f(x) Functions (4)
Function Calls Lines Branches Blocks
boost::corosio::detail::file_preadv(int, iovec const*, int, long long) :83 490x 100.0% 50.0% 66.0% boost::corosio::detail::file_pwritev(int, iovec const*, int, long long) :89 56x 100.0% 50.0% 66.0% boost::corosio::detail::file_fstat(int, stat*) :95 561x 100.0% 50.0% 66.0% boost::corosio::detail::file_ftruncate(int, long long) :101 15x 100.0% 50.0% 66.0%
Line Branch TLA Hits Source Code
1 //
2 // Copyright (c) 2026 Michael Vandeberg
3 //
4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // Official repository: https://github.com/cppalliance/corosio
8 //
9
10 #ifndef BOOST_COROSIO_NATIVE_DETAIL_POSIX_LARGE_FILE_HPP
11 #define BOOST_COROSIO_NATIVE_DETAIL_POSIX_LARGE_FILE_HPP
12
13 #include <boost/corosio/detail/platform.hpp>
14
15 #if BOOST_COROSIO_POSIX
16
17 #include <fcntl.h>
18 #include <sys/stat.h>
19 #include <sys/types.h>
20 #include <sys/uio.h>
21 #include <unistd.h>
22
23 /* 64-bit file offsets in every build.
24
25 32-bit glibc has a 32-bit off_t unless the including translation
26 unit defines _FILE_OFFSET_BITS=64, which the library cannot require
27 of its users. The plain calls then fail past 2 GiB: EOVERFLOW for an
28 offset that does not fit, and EFBIG for a file opened without
29 O_LARGEFILE. There the explicit *64 calls and O_LARGEFILE are used.
30 Everywhere else off_t is already 64-bit, and the plain calls are
31 kept, so the fault harness's shadows of them still apply.
32 */
33
34 namespace boost::corosio::detail {
35
36 #if defined(__GLIBC__) && !defined(__OFF_T_MATCHES_OFF64_T)
37
38 using file_off_t = off64_t;
39 using file_stat_t = struct stat64;
40
41 /// Add to the flags of every open() of a file the library owns.
42 inline constexpr int large_file_open_flag = O_LARGEFILE;
43
44 inline ssize_t
45 file_preadv(int fd, iovec const* iov, int n, file_off_t off) noexcept
46 {
47 return ::preadv64(fd, iov, n, off);
48 }
49
50 inline ssize_t
51 file_pwritev(int fd, iovec const* iov, int n, file_off_t off) noexcept
52 {
53 return ::pwritev64(fd, iov, n, off);
54 }
55
56 inline int
57 file_fstat(int fd, file_stat_t* st) noexcept
58 {
59 return ::fstat64(fd, st);
60 }
61
62 inline int
63 file_ftruncate(int fd, file_off_t len) noexcept
64 {
65 return ::ftruncate64(fd, len);
66 }
67
68 inline file_off_t
69 file_lseek(int fd, file_off_t off, int whence) noexcept
70 {
71 return ::lseek64(fd, off, whence);
72 }
73
74 #else
75
76 using file_off_t = off_t;
77 using file_stat_t = struct stat;
78
79 /// Add to the flags of every open() of a file the library owns.
80 inline constexpr int large_file_open_flag = 0;
81
82 inline ssize_t
83 490x file_preadv(int fd, iovec const* iov, int n, file_off_t off) noexcept
84 {
85
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 490x return ::preadv(fd, iov, n, off);
86 }
87
88 inline ssize_t
89 56x file_pwritev(int fd, iovec const* iov, int n, file_off_t off) noexcept
90 {
91
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 56x return ::pwritev(fd, iov, n, off);
92 }
93
94 inline int
95 561x file_fstat(int fd, file_stat_t* st) noexcept
96 {
97
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 561x return ::fstat(fd, st);
98 }
99
100 inline int
101 15x file_ftruncate(int fd, file_off_t len) noexcept
102 {
103
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 15x return ::ftruncate(fd, len);
104 }
105
106 inline file_off_t
107 file_lseek(int fd, file_off_t off, int whence) noexcept
108 {
109 return ::lseek(fd, off, whence);
110 }
111
112 #endif
113
114 } // namespace boost::corosio::detail
115
116 #endif // BOOST_COROSIO_POSIX
117
118 #endif // BOOST_COROSIO_NATIVE_DETAIL_POSIX_LARGE_FILE_HPP
119