From a36c6528b10cb5b5d48fbf30a941443f738c9dd1 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Sun, 1 Apr 2018 23:23:34 +0200
Subject: Terminal inside Lua window manager

---
 src/lib/include/kogata/mainloop.h |  2 ++
 src/lib/libkogata/mainloop.c      | 20 ++++++++++++++++----
 2 files changed, 18 insertions(+), 4 deletions(-)

(limited to 'src/lib')

diff --git a/src/lib/include/kogata/mainloop.h b/src/lib/include/kogata/mainloop.h
index 2b447ef..6352916 100644
--- a/src/lib/include/kogata/mainloop.h
+++ b/src/lib/include/kogata/mainloop.h
@@ -12,6 +12,7 @@ typedef struct mainloop_fd mainloop_fd_t;
 
 typedef void (*buf_full_callback_t)(mainloop_fd_t *fd);
 typedef void (*fd_error_callback_t)(mainloop_fd_t *fd);
+typedef void (*idle_callback_t)(void* data);
 
 typedef struct {
 	size_t size, written;
@@ -41,6 +42,7 @@ void mainloop_rm_fd(mainloop_fd_t* fd);
 void mainloop_expect(mainloop_fd_t *fd, void* buf, size_t size, buf_full_callback_t cb);
 bool mainloop_nonblocking_write(mainloop_fd_t *fd, void* buf, size_t size, bool must_free_buf);
 
+void mainloop_when_idle(idle_callback_t cb, void* data);
 void mainloop_run();
 void mainloop_exit();
 
diff --git a/src/lib/libkogata/mainloop.c b/src/lib/libkogata/mainloop.c
index c1758a4..75fb252 100644
--- a/src/lib/libkogata/mainloop.c
+++ b/src/lib/libkogata/mainloop.c
@@ -7,6 +7,9 @@ mainloop_fd_t *mainloop_fds = 0;
 bool mainloop_fds_change = false;
 bool mainloop_must_exit = false;
 
+idle_callback_t mainloop_idle_cb = 0;
+void* mainloop_idle_cb_data = 0;
+
 void mainloop_add_fd(mainloop_fd_t* fd) {
 	mainloop_fds_change = true;
 
@@ -53,12 +56,19 @@ bool mainloop_nonblocking_write(mainloop_fd_t *fd, void* buf, size_t size, bool
 	return false;
 }
 
+void mainloop_when_idle(idle_callback_t cb, void* data) {
+	mainloop_idle_cb = cb;
+	mainloop_idle_cb_data = data;
+}
+
 void mainloop_run() {
 	sel_fd_t *sel_arg = 0;
 	int nfds = 0;
 
 	mainloop_fds_change = true;
 	mainloop_must_exit = false;
+
+	bool after_idle_step = false;
 	while(!mainloop_must_exit) {
 		if (mainloop_fds_change) {
 			nfds = 0;
@@ -91,11 +101,12 @@ void mainloop_run() {
 
 		//  ---- Do the select
 		/*dbg_printf("(mainloop) begin select\n");*/
-		bool ok = sc_select(sel_arg, nfds, -1);
+		bool ok = sc_select(sel_arg, nfds, (after_idle_step || mainloop_idle_cb == 0 ? -1 : 0));
 		if (!ok) {
-			dbg_printf("(mainloop) Failed to select.\n");
-			free(sel_arg);
-			return;
+			// nothing happenned
+			if (mainloop_idle_cb != 0) mainloop_idle_cb(mainloop_idle_cb_data);
+			after_idle_step = true;
+			continue;
 		}
 		/*dbg_printf("(mainloop) end select\n");*/
 		
@@ -131,6 +142,7 @@ void mainloop_run() {
 				}
 				i++;
 			}
+			after_idle_step = false;
 		}
 	}
 }
-- 
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