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Checking for Activity Coordinator resource support

  • Artikkeli

This example shows how apps can use IsActivityCoordinatorResourceSupported to detect support for resources prior to creating a policy. You can use the IsActivityCoordinatorResourceSupported to check for any supported ACTIVITY_COORDINATOR_RESOURCE at runtime.

Check for NPU support example

The following example demonstrates how to check for NPU support using the new capability-check API for resources. This API allows apps to check for supported resource types at runtime and will return true if the NPU resource is supported on the current system. This example creates an Activity Coordinator policy and sets the NPU resource condition to ACTIVITY_COORDINATOR_CONDITION_GOOD if it is supported.

#include <Windows.h>
#include <ActivityCoordinator.h>
#include <wil/resource.h>
#include <apiquery2.h>

// Declare RAII wrappers for the Activity Coordinator policy and subscription.
// These behave like traditional smart pointers and will call their associated
// API cleanup functions when they go out of scope.
using unique_policy = wil::unique_any<
          ACTIVITY_COORDINATOR_POLICY,
          decltype(&DestroyActivityCoordinatorPolicy),
          DestroyActivityCoordinatorPolicy>;

bool
CanUseNpuPolicy()
{
    // Check that the Activity Coordinator feature check API is implemented
    // before calling.
    if (IsApiSetImplemented("ext-ms-win-resourcemanager-activitycoordinator-l1-1-1")) {
        if (IsActivityCoordinatorResourceSupported(ACTIVITY_COORDINATOR_RESOURCE_NPU)) {
            return true;
        }
    }

    return false;
}

int
__cdecl
wmain()
{
    unique_policy policy;

    // Activity Coordinator support for NPUs does not indicate their actual
    // presence on the system. Applications must still detect and target desired
    // hardware using their API or framework of choice.
    //
    // When using system resources not supported by Activity Coordinator, it is
    // recommended that policies always include USER_IDLE in the GOOD condition.
    // This will help minimize the potential for interference with a user's
    // foreground applications utilizing the same resource.
    //
    // The GOOD policy template covers this scenario in addition to other
    // resources that most applications are likely to affect even when targeting
    // dedicated hardware.
    RETURN_IF_FAILED(CreateActivityCoordinatorPolicy(
        ACTIVITY_COORDINATOR_POLICY_TEMPLATE_GOOD,
        &policy));

    if (CanUseNpuPolicy()) {
        RETURN_IF_FAILED(SetActivityCoordinatorPolicyResourceCondition(
            policy.get(),
            ACTIVITY_COORDINATOR_RESOURCE_NPU,
            ACTIVITY_COORDINATOR_CONDITION_GOOD));
    }

    // Proceed to use Activity Coordinator to run opportunistic work. See the
    // example project in the documentation for further details.

    return S_OK;
}

See also