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#ifndef CAFFE2_CORE_NET_H_
#define CAFFE2_CORE_NET_H_
#include <atomic>
#include <climits>
#include <cstddef>
#include <thread> // NOLINT
#include <typeinfo>
#include <unordered_map>
#include <vector>
#include "c10/core/thread_pool.h"
#include "c10/util/Registry.h"
#include "caffe2/core/blob.h"
#include "caffe2/core/common.h"
#include "caffe2/core/logging.h"
#include "caffe2/core/observer.h"
#include "caffe2/core/operator_schema.h"
#include "caffe2/core/tensor.h"
#include "caffe2/proto/caffe2_pb.h"
#include "caffe2/utils/simple_queue.h"
C10_DECLARE_string(caffe2_override_executor);
namespace caffe2 {
class NetBase;
typedef ObserverBase<NetBase> NetObserver;
typedef std::function<std::unique_ptr<NetObserver>(NetBase*)>
NetObserverCreator;
class OperatorBase;
class Workspace;
// Net is a thin struct that owns all the operators together with the operator
// contexts.
class TORCH_API NetBase : public Observable<NetBase> {
public:
NetBase(const std::shared_ptr<const NetDef>& net_def, Workspace* ws);
virtual ~NetBase() noexcept {}
virtual bool SupportsAsync() = 0;
inline const vector<const Event*>& events() const {
return events_;
}
virtual void Wait() {
// by default just wait till all events are finished
for (const auto& event : events_) {
event->Finish();
}
}
virtual bool Run() {
if (!RunAsync()) {
LOG(ERROR) << "Failed to execute async run";
return false;
}
Wait();
return handleRunError();
}
virtual bool RunAsync();
virtual void Cancel();
/* Benchmarks a network for one individual run so that we can feed new
* inputs on additional calls.
* This function returns the number of microseconds spent
* during the benchmark
*/
virtual float TEST_Benchmark_One_Run();
/**
* Benchmarks a network.
*
* This function returns a vector of float recording the number of milli-
* seconds spent during the benchmark. The 0-th item is the time spent per
* each network run, and if a net instantiation supports run_individual,
* the remainder of the vector returns the number of milliseconds spent per
* operator.
*/
virtual vector<float> TEST_Benchmark(
const int /*warmup_runs*/,
const int /*main_runs*/,
const bool /*run_individual*/);
inline const vector<string>& external_output() const {
return external_output_;
}
inline const vector<string>& external_input() const {
return external_input_;
}
/* Used to attach Observers to operators of a Net
*
* Returns pointers to objects owned with unique_ptrs.
* Use with caution.
*/
virtual vector<OperatorBase*> GetOperators() const = 0;
const string& Name() const {
return name_;
}
inline const NetDef& debug_def() const {
CAFFE_ENFORCE(has_debug_def(), "net_def was null!");
return *net_def_;
}
inline bool has_debug_def() const {
return net_def_ != nullptr;
}
protected:
virtual bool DoRunAsync() {
CAFFE_THROW("Not implemented");
};
virtual bool handleRunError() {
for (const Event* event : events_) {
if (event->Query() != EventStatus::EVENT_SUCCESS) {
CAFFE_THROW(event->ErrorMessage());
}
}
return true;
}
vector<string> external_input_;
vector<string> external_output_;
string name_;
vector<const Event*> events_;
std::shared_ptr<const NetDef> net_def_;
C10_DISABLE_COPY_AND_ASSIGN(NetBase);
};
class TORCH_API ExecutorHelper {
public:
ExecutorHelper() {}
virtual TaskThreadPoolBase* GetPool(const DeviceOption& option) const;
virtual std::vector<OperatorBase*> GetOperators() const;
virtual int GetNumWorkers() const;
virtual ~ExecutorHelper() {}
};
C10_DECLARE_REGISTRY(
NetRegistry,
NetBase,
const std::shared_ptr<const NetDef>&,
Workspace*);
#define REGISTER_NET_CREATOR(key, ...) \
C10_REGISTER_CREATOR(NetRegistry, key, __VA_ARGS__)
#define REGISTER_NET(name, ...) \
C10_REGISTER_CLASS(NetRegistry, name, __VA_ARGS__)
/**
* @brief Creates a network, accessing / creating blobs in the given workspace.
*
* Note that this is different from Workspace::CreateNet. The latter adds the
* created net object to the workspace's net map, while this function returns
* a standalone net object.
*/
TORCH_API unique_ptr<NetBase> CreateNet(const NetDef& net_def, Workspace* ws);
TORCH_API unique_ptr<NetBase> CreateNet(
const std::shared_ptr<const NetDef>& net_def,
Workspace* ws);
TORCH_API void AddGlobalNetObserverCreator(NetObserverCreator creator);
TORCH_API void ClearGlobalNetObservers();
} // namespace caffe2
#endif // CAFFE2_CORE_NET_H_
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