use thread_yield instead of thread_yield_to in workerpool (alibaba#968)

MJY-HUST · web-flow · commit a6fe522e261e · 2025-09-02T17:18:30.000+08:00
* use thread_yield instead of  thread_yield_to in workerpool
diff --git a/thread/workerpool.cpp b/thread/workerpool.cpp
@@ -131,8 +131,10 @@ class WorkPool::impl {
             } else {
                 auto th = !pool ? thread_create(&delegate_helper, &tasklb) :
                            pool-> thread_create(&delegate_helper, &tasklb) ;
-                // yield to th so as to copy tasklb to th's stack
-                photon::thread_yield_to(th);
+                (void)th;
+                // Once yield the current coroutine, the newly created coroutine will always
+                // be scheduled before the current coroutine. tasklb will not be overwritten.
+                photon::thread_yield();
             }
         }
         while (running_tasks)

Original file line number	Diff line number	Diff line change
`@@ -131,8 +131,10 @@ class WorkPool::impl {`
`131`	`131`	`} else {`
`132`	`132`	`auto th = !pool ? thread_create(&delegate_helper, &tasklb) :`
`133`	`133`	`pool-> thread_create(&delegate_helper, &tasklb) ;`
`134`		`- // yield to th so as to copy tasklb to th's stack`
`135`		`- photon::thread_yield_to(th);`
	`134`	`+ (void)th;`
	`135`	`+ // Once yield the current coroutine, the newly created coroutine will always`
	`136`	`+ // be scheduled before the current coroutine. tasklb will not be overwritten.`
	`137`	`+ photon::thread_yield();`
`136`	`138`	`}`
`137`	`139`	`}`
`138`	`140`	`while (running_tasks)`