[PATCH 01 of 10] Mail: switched to posted events when resuming reading

[Maxim Dounin]

# HG changeset patch
# User Maxim Dounin <mdou...@mdounin.ru>
# Date 1710526239 -10800
#      Fri Mar 15 21:10:39 2024 +0300
# Node ID dc9a4c5573411f8f6115db56d201ce0fa2c002fc
# Parent  c363ad6b3b23ae7fed28a7cdfa20b0cb3fc6a584
Mail: switched to posted events when resuming reading.

When resuming reading after ngx_mail_send(), switched to using posted
events instead of a direct event handler call.  This ensures limited
stack usage when processing multiple pipelined commands.

diff --git a/src/mail/ngx_mail_handler.c b/src/mail/ngx_mail_handler.c
--- a/src/mail/ngx_mail_handler.c
+++ b/src/mail/ngx_mail_handler.c
@@ -799,7 +799,7 @@ ngx_mail_send(ngx_event_t *wev)
         }
 
         if (s->blocked) {
-            c->read->handler(c->read);
+            ngx_post_event(c->read, &ngx_posted_events);
         }
 
         return;

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