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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_FRAMEWORKS_ML_NN_RUNTIME_EVENT_H
#define ANDROID_FRAMEWORKS_ML_NN_RUNTIME_EVENT_H
#include <android/sync.h>
#include <utility>
#include "Callbacks.h"
#include "HalInterfaces.h"
namespace android::nn {
class IEvent {
public:
virtual ~IEvent() = default;
virtual void wait() const = 0;
virtual hal::ErrorStatus getStatus() const = 0;
virtual int getSyncFenceFd(bool shouldDup) const = 0;
};
// The CallbackEvent wraps ExecutionCallback
class CallbackEvent : public IEvent {
public:
CallbackEvent(sp<ExecutionCallback> callback) : kExecutionCallback(std::move(callback)) {
CHECK(kExecutionCallback != nullptr);
}
void wait() const override { kExecutionCallback->wait(); }
hal::ErrorStatus getStatus() const override { return kExecutionCallback->getStatus(); }
// Always return -1 as this is not backed by a sync fence.
int getSyncFenceFd(bool /*should_dup*/) const override { return -1; }
private:
const sp<ExecutionCallback> kExecutionCallback;
};
// The SyncFenceEvent wraps sync fence and IFencedExecutionCallback
class SyncFenceEvent : public IEvent {
public:
SyncFenceEvent(int sync_fence_fd, const sp<hal::IFencedExecutionCallback>& callback)
: kFencedExecutionCallback(callback) {
if (sync_fence_fd > 0) {
// Dup the provided file descriptor
mSyncFenceFd = dup(sync_fence_fd);
CHECK(mSyncFenceFd > 0);
}
}
// Close the fd the event owns.
~SyncFenceEvent() { close(mSyncFenceFd); }
// Use syncWait to wait for the sync fence until the status change.
void wait() const override { syncWait(mSyncFenceFd, -1); }
// Get the status of the event.
// In case of syncWait error, query the dispatch callback for detailed
// error status.
hal::ErrorStatus getStatus() const override {
auto error = hal::ErrorStatus::NONE;
if (mSyncFenceFd > 0 && syncWait(mSyncFenceFd, -1) != FenceState::SIGNALED) {
error = hal::ErrorStatus::GENERAL_FAILURE;
// If there is a callback available, use the callback to get the error code.
if (kFencedExecutionCallback != nullptr) {
const hal::Return<void> ret = kFencedExecutionCallback->getExecutionInfo(
[&error](hal::ErrorStatus status, hal::Timing, hal::Timing) {
error = status;
});
if (!ret.isOk()) {
error = hal::ErrorStatus::GENERAL_FAILURE;
}
}
}
return error;
}
// Return the sync fence fd.
// If shouldDup is true, the caller must close the fd returned:
// - When being used internally within NNAPI runtime, set shouldDup to false.
// - When being used to return a fd to application code, set shouldDup to
// true.
int getSyncFenceFd(bool shouldDup) const override {
if (shouldDup) {
return dup(mSyncFenceFd);
}
return mSyncFenceFd;
}
private:
// TODO(b/148423931): used android::base::unique_fd instead.
int mSyncFenceFd = -1;
const sp<hal::IFencedExecutionCallback> kFencedExecutionCallback;
};
} // namespace android::nn
#endif // ANDROID_FRAMEWORKS_ML_NN_RUNTIME_EVENT_H
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