From d39e7cad4a1c69634a943f34cc0d2f69824a29fb Mon Sep 17 00:00:00 2001
From: James Benton <james.benton2@gmail.com>
Date: Sat, 18 Jan 2020 10:58:02 +0000
Subject: [PATCH] wutstdc++: Use OSSetThreadRunQuantum in gthread
 implementation.

To emulate pre-emptive scheduling which is what would be expected from
gthread.
---
 libraries/wutstdc++/wut_gthread_thread.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libraries/wutstdc++/wut_gthread_thread.cpp b/libraries/wutstdc++/wut_gthread_thread.cpp
index 93015b7..5cc0c83 100644
--- a/libraries/wutstdc++/wut_gthread_thread.cpp
+++ b/libraries/wutstdc++/wut_gthread_thread.cpp
@@ -43,6 +43,11 @@ __wut_thread_create(OSThread **outThread,
    *outThread = thread;
    OSSetThreadDeallocator(thread, &__wut_thread_deallocator);
    OSSetThreadCleanupCallback(thread, &__wut_thread_cleanup);
+
+   // Set a thread run quantum to 1 millisecond, to force the threads to
+   // behave more like pre-emptive scheduling rather than co-operative.
+   OSSetThreadRunQuantum(thread, 1000);
+
    OSResumeThread(thread);
    return 0;
 }