Program Listing for File module.h#
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 TVM_FFI_EXTRA_MODULE_H_
#define TVM_FFI_EXTRA_MODULE_H_
#include <tvm/ffi/container/array.h>
#include <tvm/ffi/container/map.h>
#include <tvm/ffi/extra/base.h>
#include <tvm/ffi/function.h>
namespace tvm {
namespace ffi {
// forward declare Module
class Module;
class TVM_FFI_EXTRA_CXX_API ModuleObj : public Object {
public:
virtual const char* kind() const = 0;
virtual int GetPropertyMask() const { return 0b000; }
virtual Optional<Function> GetFunction(const String& name) = 0;
virtual bool ImplementsFunction(const String& name) { return GetFunction(name).defined(); }
virtual Optional<String> GetFunctionDoc(const String& name) { return std::nullopt; }
// Rationale: We separate the docstring from the metadata since docstrings
// can be unstructured and sometimes large, while metadata can be focused
// on storing structured information.
virtual Optional<String> GetFunctionMetadata(const String& name) { return std::nullopt; }
virtual void WriteToFile(const String& file_name, const String& format) const {
TVM_FFI_THROW(RuntimeError) << "Module[" << kind() << "] does not support WriteToFile";
}
virtual Array<String> GetWriteFormats() const { return Array<String>(); }
virtual Bytes SaveToBytes() const {
TVM_FFI_THROW(RuntimeError) << "Module[" << kind() << "] does not support SaveToBytes";
TVM_FFI_UNREACHABLE();
}
virtual String InspectSource(const String& format = "") const { return String(); }
virtual void ImportModule(const Module& other);
virtual void ClearImports();
Optional<Function> GetFunction(const String& name, bool query_imports);
bool ImplementsFunction(const String& name, bool query_imports);
Optional<String> GetFunctionDoc(const String& name, bool query_imports);
Optional<String> GetFunctionMetadata(const String& name, bool query_imports);
const Array<Any>& imports() const { return this->imports_; }
struct InternalUnsafe;
static constexpr const int32_t _type_index = TypeIndex::kTVMFFIModule;
static constexpr const bool _type_mutable = true;
static const constexpr bool _type_final = true;
TVM_FFI_DECLARE_OBJECT_INFO_STATIC(StaticTypeKey::kTVMFFIModule, ModuleObj, Object);
protected:
friend struct InternalUnsafe;
Array<Any> imports_;
private:
Map<String, ffi::Function> import_lookup_cache_;
};
class Module : public ObjectRef {
public:
enum ModulePropertyMask : int {
kBinarySerializable = 0b001,
kRunnable = 0b010,
kCompilationExportable = 0b100
};
explicit Module(ObjectPtr<ModuleObj> ptr) : ObjectRef(ptr) { TVM_FFI_ICHECK(ptr != nullptr); }
TVM_FFI_EXTRA_CXX_API static Module LoadFromFile(const String& file_name);
TVM_FFI_EXTRA_CXX_API static void VisitContextSymbols(
const ffi::TypedFunction<void(String, void*)>& callback);
TVM_FFI_DEFINE_OBJECT_REF_METHODS_NOTNULLABLE(Module, ObjectRef, ModuleObj);
};
/*
* \brief Symbols for library module.
*/
namespace symbol {
constexpr const char* tvm_ffi_symbol_prefix = "__tvm_ffi_";
// Special symbols have one extra _ prefix to avoid conflict with user symbols
constexpr const char* tvm_ffi_main = "__tvm_ffi_main";
constexpr const char* tvm_ffi_library_ctx = "__tvm_ffi__library_ctx";
constexpr const char* tvm_ffi_library_bin = "__tvm_ffi__library_bin";
constexpr const char* tvm_ffi_metadata_prefix = "__tvm_ffi__metadata_";
} // namespace symbol
} // namespace ffi
} // namespace tvm
#endif // TVM_FFI_EXTRA_MODULE_H_