Support COW mapped_file_handle

patstew · patstew · commit 5c22f5ce0acc · 2024-06-13T21:19:31.000+01:00
diff --git a/include/llfio/v2.0/detail/impl/posix/mapped_file_handle.ipp b/include/llfio/v2.0/detail/impl/posix/mapped_file_handle.ipp
@@ -59,6 +59,7 @@ result<mapped_file_handle::size_type> mapped_file_handle::_reserve(extent_type &
   }
   // Reserve the full reservation in address space
   section_handle::flag mapflags = section_handle::flag::nocommit | section_handle::flag::read;
+  mapflags |= _sh.section_flags() & section_handle::flag::cow;
   if(this->is_writable())
   {
     mapflags |= section_handle::flag::write;
diff --git a/include/llfio/v2.0/detail/impl/windows/mapped_file_handle.ipp b/include/llfio/v2.0/detail/impl/windows/mapped_file_handle.ipp
@@ -63,6 +63,7 @@ result<mapped_file_handle::size_type> mapped_file_handle::_reserve(extent_type &
     return _reservation;
   }
   section_handle::flag mapflags = section_handle::flag::read;
+  mapflags |= _sh.section_flags() & section_handle::flag::cow;
   auto map_size = reservation;
   // Reserve the full reservation in address space
   if(this->is_writable())

Original file line number	Diff line number	Diff line change
`@@ -59,6 +59,7 @@ result<mapped_file_handle::size_type> mapped_file_handle::_reserve(extent_type &`
`59`	`59`	`}`
`60`	`60`	`// Reserve the full reservation in address space`
`61`	`61`	`section_handle::flag mapflags = section_handle::flag::nocommit \| section_handle::flag::read;`
	`62`	`+ mapflags \|= _sh.section_flags() & section_handle::flag::cow;`
`62`	`63`	`if(this->is_writable())`
`63`	`64`	`{`
`64`	`65`	`mapflags \|= section_handle::flag::write;`
Original file line number	Diff line number	Diff line change
`@@ -63,6 +63,7 @@ result<mapped_file_handle::size_type> mapped_file_handle::_reserve(extent_type &`
`63`	`63`	`return _reservation;`
`64`	`64`	`}`
`65`	`65`	`section_handle::flag mapflags = section_handle::flag::read;`
	`66`	`+ mapflags \|= _sh.section_flags() & section_handle::flag::cow;`
`66`	`67`	`auto map_size = reservation;`
`67`	`68`	`// Reserve the full reservation in address space`
`68`	`69`	`if(this->is_writable())`