namespace example {
-/** Execute the code in the kernel at some time
- *
- * @param date when we should execute the code
- * @param code code to execute
- * @return future with the result of the call
- */
-template<class F>
-auto kernel_defer(double date, F code) -> simgrid::kernel::Future<decltype(code())>
+/** Create a future which becomes ready when the date is reached */
+static
+simgrid::kernel::Future<void> kernel_wait_until(double date)
{
- typedef decltype(code()) T;
- auto promise = std::make_shared<simgrid::kernel::Promise<T>>();
+ auto promise = std::make_shared<simgrid::kernel::Promise<void>>();
auto future = promise->get_future();
- SIMIX_timer_set(date, [promise, code] {
- simgrid::xbt::fulfillPromise(*promise, std::move(code));
+ SIMIX_timer_set(date, [promise] {
+ promise->set_value();
});
return future;
}
// Synchronize on a successful Future<void>:
simgrid::simix::kernelSync([&] {
- return kernel_defer(10, [] {
+ return kernel_wait_until(10).then([](simgrid::kernel::Future<void> future) {
+ future.get();
XBT_INFO("kernelSync with void");
});
});
// Synchronize on a failing Future<void>:
try {
simgrid::simix::kernelSync([&] {
- return kernel_defer(20, [] {
+ return kernel_wait_until(20).then([](simgrid::kernel::Future<void> future) {
+ future.get();
throw std::runtime_error("Exception throwed from kernel_defer");
});
});
// Synchronize on a successul Future<int> and get the value:
int res = simgrid::simix::kernelSync([&] {
- return kernel_defer(30, [] {
+ return kernel_wait_until(30).then([](simgrid::kernel::Future<void> future) {
+ future.get();
XBT_INFO("kernelSync with value");
return 42;
});
// Synchronize on a successul Future<int> and get the value:
simgrid::simix::Future<int> future = simgrid::simix::kernelAsync([&] {
- return kernel_defer(50, [] {
+ return kernel_wait_until(50).then([](simgrid::kernel::Future<void> future) {
+ future.get();
XBT_INFO("kernelAsync with value");
return 43;
});
// Synchronize on a successul Future<int> and get the value:
future = simgrid::simix::kernelAsync([&] {
- return kernel_defer(60, [] {
+ return kernel_wait_until(60).then([](simgrid::kernel::Future<void> future) {
+ future.get();
XBT_INFO("kernelAsync with value");
return 43;
});