[SYCL] Add wait to device_global_device_only to avoid race (#1254)

romanovvlad · web-flow · commit fc64e4ec955e · 2022-09-13T14:12:16.000+02:00
diff --git a/SYCL/DeviceGlobal/device_global_device_only.cpp b/SYCL/DeviceGlobal/device_global_device_only.cpp
@@ -34,6 +34,8 @@ int main() {
   queue Q;
 
   Q.single_task([=]() { DeviceGlobalVar.get()[0] = 42; });
+  // Make sure that the write happens before subsequent read
+  Q.wait();
 
   int OutVal = 0;
   {

Original file line number	Diff line number	Diff line change
`@@ -34,6 +34,8 @@ int main() {`
`34`	`34`	`queue Q;`
`35`	`35`
`36`	`36`	`Q.single_task([=]() { DeviceGlobalVar.get()[0] = 42; });`
	`37`	`+ // Make sure that the write happens before subsequent read`
	`38`	`+ Q.wait();`
`37`	`39`
`38`	`40`	`int OutVal = 0;`
`39`	`41`	`{`