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Merge pull request #11538 from NixOS/detect-close_range

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Use close_range when available
This commit is contained in:
Eelco Dolstra 2024-09-19 13:48:27 +02:00 committed by GitHub
commit e60b90192a
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3 changed files with 6 additions and 2 deletions
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2
configure.ac
View File

@ -86,7 +86,7 @@ static char buf[1024];]],
AC_LANG_POP(C++)
AC_CHECK_FUNCS([statvfs pipe2])
AC_CHECK_FUNCS([statvfs pipe2 close_range])
# Check for lutimes, optionally used for changing the mtime of

1
src/libutil/meson.build
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@ -28,6 +28,7 @@ subdir('build-utils-meson/subprojects')
# HAVE_LUTIMES 1`. The `#define` is unconditional, 0 for not found and 1
# for found. One therefore uses it with `#if` not `#ifdef`.
check_funcs = [
'close_range',
# Optionally used for changing the mtime of symlinks.
'lutimes',
# Optionally used for creating pipes on Unix

5
src/libutil/unix/file-descriptor.cc
View File

@ -121,10 +121,13 @@ void Pipe::create()
//////////////////////////////////////////////////////////////////////
#if __linux__ || __FreeBSD__
// In future we can use a syscall wrapper, but at the moment musl and older glibc version don't support it.
static int unix_close_range(unsigned int first, unsigned int last, int flags)
{
#if !HAVE_CLOSE_RANGE
return syscall(SYS_close_range, first, last, (unsigned int)flags);
#else
return close_range(first, last, flags);
#endif
}
#endif