Implement fs::file::write_gather (Vectored I/O)

2019-06-03 22:57:59 +03:00
parent 31994dd3b2
commit 447029a700
3 changed files with 64 additions and 6 deletions
@@ -65,6 +65,13 @@ namespace fs
 		s64 ctime;
 	};

+	// Helper, layout is equal to iovec struct
+	struct iovec_clone
+	{
+		const void* iov_base;
+		std::size_t iov_len;
+	};
+
 	// File handle base
 	struct file_base
 	{
@@ -78,6 +85,7 @@ namespace fs
 		virtual u64 seek(s64 offset, seek_mode whence) = 0;
 		virtual u64 size() = 0;
 		virtual native_handle get_handle();
+		virtual u64 write_gather(const iovec_clone* buffers, u64 buf_count);
 	};

 	// Directory entry (TODO)
@@ -362,6 +370,13 @@ namespace fs
 		// Get native handle if available
 		native_handle get_handle() const;

+		// Gathered write
+		u64 write_gather(const iovec_clone* buffers, u64 buf_count) const
+		{
+			if (!m_file) xnull();
+			return m_file->write_gather(buffers, buf_count);
+		}
+
 #ifdef _WIN32
 		// Windows-specific function
 		bool set_delete(bool autodelete = true) const;