mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
/* scoped_mmap, automatically unmap files
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Copyright (C) 2018-2024 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef COMMON_SCOPED_MMAP_H
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#define COMMON_SCOPED_MMAP_H
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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/* A smart-pointer-like class to mmap() and automatically munmap() a memory
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mapping. */
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class scoped_mmap
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{
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public:
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scoped_mmap () noexcept : m_mem (MAP_FAILED), m_length (0) {}
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scoped_mmap (void *addr, size_t length, int prot, int flags, int fd,
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off_t offset) noexcept : m_length (length)
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{
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m_mem = mmap (addr, m_length, prot, flags, fd, offset);
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}
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~scoped_mmap ()
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{
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destroy ();
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}
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scoped_mmap (scoped_mmap &&rhs) noexcept
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: m_mem (rhs.m_mem),
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m_length (rhs.m_length)
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{
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rhs.m_mem = MAP_FAILED;
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rhs.m_length = 0;
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}
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DISABLE_COPY_AND_ASSIGN (scoped_mmap);
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ATTRIBUTE_UNUSED_RESULT void *release () noexcept
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{
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void *mem = m_mem;
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m_mem = MAP_FAILED;
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m_length = 0;
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return mem;
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}
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void reset (void *addr, size_t length, int prot, int flags, int fd,
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off_t offset) noexcept
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{
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destroy ();
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m_length = length;
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m_mem = mmap (addr, m_length, prot, flags, fd, offset);
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}
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size_t size () const noexcept { return m_length; }
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void *get () const noexcept { return m_mem; }
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private:
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void destroy ()
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{
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if (m_mem != MAP_FAILED)
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munmap (m_mem, m_length);
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}
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void *m_mem;
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size_t m_length;
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};
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/* Map FILENAME in memory. Throw an error if anything goes wrong. */
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scoped_mmap mmap_file (const char *filename);
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#endif /* HAVE_SYS_MMAN_H */
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#endif /* COMMON_SCOPED_MMAP_H */
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