From 0c9cc5dd53a4f34c9ebc28c24f31a8c62e5ffe3a Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Fri, 5 Mar 2021 00:48:57 +0100
Subject: Implemented flush continuation

---
 plop.c   |  2 +-
 stream.c | 33 ++++++++++++++++++++++-----------
 2 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/plop.c b/plop.c
index 5e25f00..16cad9c 100644
--- a/plop.c
+++ b/plop.c
@@ -195,7 +195,7 @@ int plop_handle_client(lua_State * L, struct epoll_event * event)
 int plop_handle_server(lua_State * L, const int efd, const int server)
 {
 	struct epoll_event e;
-	e.events = EPOLLIN; // TODO: Add EPOLLOUT?
+	e.events = EPOLLIN | EPOLLOUT; // TODO: Add EPOLLHUP?
 
 	const int client = accept(server, NULL, NULL);
 	if (-1 == client)
diff --git a/stream.c b/stream.c
index 017c031..1033b23 100644
--- a/stream.c
+++ b/stream.c
@@ -352,11 +352,32 @@ int stream_flush(lua_State * L)
 		return lua_error(L);
 	}
 
+	return stream_flushk(L, LUA_OK, (lua_KContext) s);
+}
+
+/// Continuation of the flush operation.
+/// \param L Lua state in which Stream resides
+/// \param status Unused
+/// \param ctx Address of the stream context in memory
+/// \return Number of the results pushed to the stack
+int stream_flushk(lua_State * L, const int status, lua_KContext ctx)
+{
+	struct stream * s = (struct stream *) ctx;
+	(void) status;
+
 	const int bytes_written = write(s->fd, s->out.data, s->out.length);
 
 	if (-1 == bytes_written)
 	{
-		// TODO: Errors and yield
+		if (EAGAIN == errno || EWOULDBLOCK == errno)
+		{
+			return lua_yieldk(L, 0, ctx, stream_flushk);
+		}
+		else
+		{
+			lua_pushstring(L, strerror(errno));
+			return lua_error(L);
+		}
 	}
 	else
 	{
@@ -367,16 +388,6 @@ int stream_flush(lua_State * L)
 	return 0;
 }
 
-/// Continuation of the flush operation.
-/// \param L Lua state in which Stream resides
-/// \param status Unused
-/// \param ctx TODO
-/// \return Number of the results pushed to the stack
-int stream_flushk(lua_State * L, const int status, lua_KContext ctx)
-{
-	return 0;
-}
-
 /// Discards the contents of output buffer without writing it anywhere.
 /// \param L Lua state in which Stream resides
 /// \return Number of the results pushed to the stack
-- 
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