Merge branch 'scheduleOnTest-wo-io' into 'master'

[ScheduleOnTest] block worker thread if IO is not available

See merge request i4/manycore/emper!315

.gitlab-ci.yml

@@ -125,6 +125,10 @@ clang-tidy:
   variables:
     EMPER_USERSPACE_RCU: 'true'
 
+.emper-no-io:
+  variables:
+    EMPER_IO: 'false'
+
 .emper-pipe-sleep-strategy:
   variables:
     EMPER_WORKER_SLEEP_STRATEGY: 'pipe'
@@ -369,6 +373,11 @@ test-mmapped-log:
     - .meson-test
   script: make && EMPER_LOG_FILE=emper.log make test
 
+test-no-io:
+  extends:
+    - .test
+    - .emper-no-io
+
 test-single-uring:
   extends:
     - .test

tests/ScheduleOnTest.cpp

 // SPDX-License-Identifier: LGPL-3.0-or-later
 // Copyright © 2021 Florian Fischer
+#include <chrono>
+#include <thread>
+
 #include "CountingPrivateSemaphore.hpp"
+#include "Emper.hpp"
 #include "Fiber.hpp"
 #include "Runtime.hpp"
 #include "Worker.hpp"
@@ -25,7 +29,12 @@ static void scheduleOnTest() {
 	ASSERT(runtime);
 	workerCount = runtime->getWorkerCount();
 
+	// Wait so all workers can suspend themselves
+	if constexpr (emper::IO) {
 		emper::sleep(1);
+	} else {	// We can not sleep using emper mechanisms -> block the worker thread
+		std::this_thread::sleep_for(std::chrono::seconds(1));
+	}
 
 	CPS cps(1);
 	runtime->scheduleOn(*Fiber::from([&] { runOn(cps); }), (iteration % workerCount));