add some scaffolding for file descriptors

1 files changed, 23 insertions, 0 deletions

diff --git a/src/kernel/fd.h b/src/kernel/fd.h
new file mode 100644
index 0000000..4976c7d
--- /dev/null
+++ b/src/kernel/fd.h
@@ -0,0 +1,23 @@
+#pragma once
+#include <stddef.h>
+
+#define FD_MAX 16
+
+typedef int fd_t; // TODO duplicated in syscalls.h
+
+enum fd_type {
+	FD_EMPTY,
+};
+
+struct fd {
+	enum fd_type type;
+};
+
+
+enum fdop { // describes the operations which can be done on file descriptors
+	FDOP_READ,
+	FDOP_WRITE,
+	FDOP_CLOSE,
+};
+
+int fdop_dispatch(enum fdop fdop, fd_t fd, void *ptr, size_t len);