1 /* scoped_mmap, automatically unmap files
3 Copyright (C) 2018-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #ifndef COMMON_SCOPED_MMAP_H
21 #define COMMON_SCOPED_MMAP_H
23 #ifdef HAVE_SYS_MMAN_H
27 /* A smart-pointer-like class to mmap() and automatically munmap() a memory
33 scoped_mmap () noexcept
: m_mem (MAP_FAILED
), m_length (0) {}
34 scoped_mmap (void *addr
, size_t length
, int prot
, int flags
, int fd
,
35 off_t offset
) noexcept
: m_length (length
)
37 m_mem
= mmap (addr
, m_length
, prot
, flags
, fd
, offset
);
45 scoped_mmap (scoped_mmap
&&rhs
) noexcept
47 m_length (rhs
.m_length
)
49 rhs
.m_mem
= MAP_FAILED
;
53 DISABLE_COPY_AND_ASSIGN (scoped_mmap
);
55 ATTRIBUTE_UNUSED_RESULT
void *release () noexcept
63 void reset (void *addr
, size_t length
, int prot
, int flags
, int fd
,
64 off_t offset
) noexcept
69 m_mem
= mmap (addr
, m_length
, prot
, flags
, fd
, offset
);
72 size_t size () const noexcept
{ return m_length
; }
73 void *get () const noexcept
{ return m_mem
; }
78 if (m_mem
!= MAP_FAILED
)
79 munmap (m_mem
, m_length
);
86 /* Map FILENAME in memory. Throw an error if anything goes wrong. */
87 scoped_mmap
mmap_file (const char *filename
);
89 #endif /* HAVE_SYS_MMAN_H */
91 #endif /* COMMON_SCOPED_MMAP_H */
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