From 1cbc894e6f30eae6fd5fcb9de79df9cf18538a2a Mon Sep 17 00:00:00 2001
From: Zygo Blaxell <bees@furryterror.org>
Date: Thu, 12 Dec 2024 22:53:00 -0500
Subject: [PATCH] task: start up more worker threads when unpausing

When paused, TaskConsumer threads will eventually notice the paused
condition and exit; however, there's nothing to restart threads when
exiting the paused state.

When unpausing, and while the lock is already held, create TaskConsumer
threads as needed to reach the target thread count.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
---
 lib/task.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/task.cc b/lib/task.cc
index 3f2a7e8..c839462 100644
--- a/lib/task.cc
+++ b/lib/task.cc
@@ -645,6 +645,9 @@ namespace crucible {
 		unique_lock<mutex> lock(m_mutex);
 		m_paused = paused;
 		m_condvar.notify_all();
+		if (!m_paused) {
+			start_threads_nolock();
+		}
 		lock.unlock();
 	}