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/*
* Copyright (C) 2021 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 SRC_TRACE_PROCESSOR_SQLITE_CREATE_FUNCTION_H_
#define SRC_TRACE_PROCESSOR_SQLITE_CREATE_FUNCTION_H_
#include <sqlite3.h>
#include <unordered_map>
#include "src/trace_processor/sqlite/register_function.h"
namespace perfetto {
namespace trace_processor {
// Implementation of CREATE_FUNCTION SQL function.
// See https://perfetto.dev/docs/analysis/metrics#metric-helper-functions for
// usage of this function.
struct CreateFunction : public SqlFunction {
struct PerFunctionState {
ScopedStmt stmt;
// void* to avoid leaking state.
void* created_functon_context;
};
struct NameAndArgc {
std::string name;
int argc;
struct Hasher {
std::size_t operator()(const NameAndArgc& s) const noexcept;
};
bool operator==(const NameAndArgc& other) const {
return name == other.name && argc == other.argc;
}
};
using State = std::unordered_map<NameAndArgc,
CreateFunction::PerFunctionState,
NameAndArgc::Hasher>;
struct Context {
sqlite3* db;
State* state;
};
static base::Status Run(Context* ctx,
size_t argc,
sqlite3_value** argv,
SqlValue& out,
Destructors&);
};
} // namespace trace_processor
} // namespace perfetto
#endif // SRC_TRACE_PROCESSOR_SQLITE_CREATE_FUNCTION_H_