From ddc4512d2e0eda6c705e002cb5dbf80719d709e1 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Sun, 16 Oct 2016 17:55:14 +0000
Subject: Rewrite command queue handling. Each client still has a command
 queue, but there is also now a global command queue. Instead of command
 queues being dispatched on demand from wherever the command happens to be
 added, they are now all dispatched from the top level server loop. Command
 queues may now also include callbacks as well as commands, and items may be
 inserted after the current command as well as at the end.

This all makes command queues significantly more predictable and easier
to use, and avoids the complex multiple nested command queues used by
source-file, if-shell and friends.

A mass rename of struct cmdq to a better name (cmdq_item probably) is
coming.
---
 cmd-source-file.c | 54 ++++++++++++++++--------------------------------------
 1 file changed, 16 insertions(+), 38 deletions(-)

(limited to 'cmd-source-file.c')

diff --git a/cmd-source-file.c b/cmd-source-file.c
index 336a79e6..6f9c4451 100644
--- a/cmd-source-file.c
+++ b/cmd-source-file.c
@@ -28,7 +28,7 @@
 
 static enum cmd_retval	cmd_source_file_exec(struct cmd *, struct cmd_q *);
 
-static void		cmd_source_file_done(struct cmd_q *);
+static enum cmd_retval	cmd_source_file_done(struct cmd_q *, void *);
 
 const struct cmd_entry cmd_source_file_entry = {
 	.name = "source-file",
@@ -45,53 +45,31 @@ static enum cmd_retval
 cmd_source_file_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args	*args = self->args;
-	struct cmd_q	*cmdq1;
+	struct client	*c = cmdq->client;
 	int		 quiet;
-
-	cmdq1 = cmdq_new(cmdq->client);
-	cmdq1->emptyfn = cmd_source_file_done;
-	cmdq1->data = cmdq;
+	struct cmd_q	*new_cmdq;
 
 	quiet = args_has(args, 'q');
-	switch (load_cfg(args->argv[0], cmdq1, quiet)) {
+	switch (load_cfg(args->argv[0], c, cmdq, quiet)) {
 	case -1:
-		cmdq_free(cmdq1);
-		if (cfg_references == 0) {
+		if (cfg_finished)
 			cfg_print_causes(cmdq);
-			return (CMD_RETURN_ERROR);
-		}
-		return (CMD_RETURN_NORMAL);
+		return (CMD_RETURN_ERROR);
 	case 0:
-		cmdq_free(cmdq1);
-		if (cfg_references == 0)
+		if (cfg_finished)
 			cfg_print_causes(cmdq);
 		return (CMD_RETURN_NORMAL);
 	}
-
-	log_debug("%s: cmdq %p, parent %p", __func__, cmdq1, cmdq);
-
-	cmdq->references++;
-	cfg_references++;
-
-	cmdq_continue(cmdq1);
-	return (CMD_RETURN_WAIT);
+	if (cfg_finished) {
+		new_cmdq = cmdq_get_callback(cmd_source_file_done, NULL);
+		cmdq_insert_after(cmdq, new_cmdq);
+	}
+	return (CMD_RETURN_NORMAL);
 }
 
-static void
-cmd_source_file_done(struct cmd_q *cmdq1)
+static enum cmd_retval
+cmd_source_file_done(struct cmd_q *cmdq, __unused void *data)
 {
-	struct cmd_q	*cmdq = cmdq1->data;
-
-	log_debug("%s: cmdq %p, parent %p", __func__, cmdq1, cmdq);
-
-	if (cmdq1->client_exit >= 0)
-		cmdq->client_exit = cmdq1->client_exit;
-	cmdq_free(cmdq1);
-
-	cfg_references--;
-	if (cmdq_free(cmdq))
-		return;
-	if (cfg_references == 0)
-		cfg_print_causes(cmdq);
-	cmdq_continue(cmdq);
+	cfg_print_causes(cmdq);
+	return (CMD_RETURN_NORMAL);
 }
-- 
cgit