Add a wait for a post on a window
#include <screen/screen.h>
int screen_wait_post(screen_window_t win, int flags)
Function Type: Immediate Execution
This call blocks until there is a post event for the window you are waiting on. This function is typically used in conjunction with screen_share_display_buffers() and/or screen_share_window_buffers().
0 if successful, or -1 if an error occurred (errno is set; refer to errno.h for more details).