vim-patch:9.0.0965: using one window for executing autocommands is insufficient

Problem:    Using one window for executing autocommands is insufficient.
Solution:   Use up to five windows for executing autocommands.

https://github.com/vim/vim/commit/e76062c078debed0df818f70e4db14ad7a7cb53a

N/A patches for version.c:

vim-patch:9.0.0966: some compilers don't allow a declaration after a label

Problem:    Some compilers don't allow a declaration after a label.
Solution:   Move the declaration to the start of the block. (John Marriott)

https://github.com/vim/vim/commit/f86490ed4fdab213a28f667abd055c023a73d645

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 12 insertions, 2 deletions

diff --git a/src/nvim/globals.h b/src/nvim/globals.h
index 737c92bc8c..feeaae1d7f 100644
--- a/src/nvim/globals.h
+++ b/src/nvim/globals.h
@@ -422,8 +422,18 @@ EXTERN win_T *prevwin INIT(= NULL);  // previous window
 
 EXTERN win_T *curwin;        // currently active window
 
-EXTERN win_T *aucmd_win;     // window used in aucmd_prepbuf()
-EXTERN int aucmd_win_used INIT(= false);  // aucmd_win is being used
+/// When executing autocommands for a buffer that is not in any window, a
+/// special window is created to handle the side effects.  When autocommands
+/// nest we may need more than one.  Allow for up to five, if more are needed
+/// something crazy is happening.
+enum { AUCMD_WIN_COUNT = 5, };
+
+typedef struct {
+  win_T *auc_win;    ///< window used in aucmd_prepbuf()
+  int auc_win_used;  ///< this auc_win is being used
+} aucmdwin_T;
+
+EXTERN aucmdwin_T aucmd_win[AUCMD_WIN_COUNT];
 
 // The window layout is kept in a tree of frames.  topframe points to the top
 // of the tree.