openethereum/ethcore/src/evm/factory.rs
Robert Habermeier 0318bb9fe9 Have Ext::ret take self by value (#1187)
* refactor externalities::ret to take self by-value, add GasLeft enum, and alter evm::Result.

* remove unused imports, StopExecutionWithGasLeft variant

* adjust tests

* remove extraneous call to reserve

* update json_tests Ext to match new trait

* adjust executive json_test

* have evms own their memory for their entire lifetime

* make finalize API more friendly

* indentation fix

[ci skip]
2016-06-02 19:04:15 +02:00

188 lines
4.0 KiB
Rust

// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Evm factory.
//!
//! TODO: consider spliting it into two separate files.
use std::fmt;
use evm::Evm;
#[derive(Debug, Clone)]
/// Type of EVM to use.
pub enum VMType {
/// JIT EVM
#[cfg(feature = "jit")]
Jit,
/// RUST EVM
Interpreter
}
impl fmt::Display for VMType {
#[cfg(feature="jit")]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", match *self {
VMType::Jit => "JIT",
VMType::Interpreter => "INT"
})
}
#[cfg(not(feature="jit"))]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", match *self {
VMType::Interpreter => "INT"
})
}
}
impl Default for VMType {
fn default() -> Self {
VMType::Interpreter
}
}
impl VMType {
/// Return all possible VMs (JIT, Interpreter)
#[cfg(feature = "jit")]
pub fn all() -> Vec<VMType> {
vec![VMType::Jit, VMType::Interpreter]
}
/// Return all possible VMs (Interpreter)
#[cfg(not(feature = "jit"))]
pub fn all() -> Vec<VMType> {
vec![VMType::Interpreter]
}
/// Return new jit if it's possible
#[cfg(not(feature = "jit"))]
pub fn jit() -> Option<Self> {
None
}
/// Return new jit if it's possible
#[cfg(feature = "jit")]
pub fn jit() -> Option<Self> {
Some(VMType::Jit)
}
}
/// Evm factory. Creates appropriate Evm.
pub struct Factory {
evm: VMType
}
impl Factory {
/// Create fresh instance of VM
#[cfg(feature = "jit")]
pub fn create(&self) -> Box<Evm> {
match self.evm {
VMType::Jit => {
Box::new(super::jit::JitEvm::default())
},
VMType::Interpreter => {
Box::new(super::interpreter::Interpreter::default())
}
}
}
/// Create fresh instance of VM
#[cfg(not(feature = "jit"))]
pub fn create(&self) -> Box<Evm> {
match self.evm {
VMType::Interpreter => {
Box::new(super::interpreter::Interpreter::default())
}
}
}
/// Create new instance of specific `VMType` factory
pub fn new(evm: VMType) -> Self {
Factory {
evm: evm
}
}
}
impl Default for Factory {
/// Returns jitvm factory
#[cfg(feature = "jit")]
fn default() -> Factory {
Factory {
evm: VMType::Jit
}
}
/// Returns native rust evm factory
#[cfg(not(feature = "jit"))]
fn default() -> Factory {
Factory {
evm: VMType::Interpreter
}
}
}
#[test]
fn test_create_vm() {
let _vm = Factory::default().create();
}
/// Create tests by injecting different VM factories
#[macro_export]
macro_rules! evm_test(
(ignorejit => $name_test: ident: $name_jit: ident, $name_int: ident) => {
#[test]
#[ignore]
#[cfg(feature = "jit")]
fn $name_jit() {
$name_test(Factory::new(VMType::Jit));
}
#[test]
fn $name_int() {
$name_test(Factory::new(VMType::Interpreter));
}
};
($name_test: ident: $name_jit: ident, $name_int: ident) => {
#[test]
#[cfg(feature = "jit")]
fn $name_jit() {
$name_test(Factory::new(VMType::Jit));
}
#[test]
fn $name_int() {
$name_test(Factory::new(VMType::Interpreter));
}
}
);
/// Create ignored tests by injecting different VM factories
#[macro_export]
macro_rules! evm_test_ignore(
($name_test: ident: $name_jit: ident, $name_int: ident) => {
#[test]
#[ignore]
#[cfg(feature = "jit")]
#[cfg(feature = "ignored-tests")]
fn $name_jit() {
$name_test(Factory::new(VMType::Jit));
}
#[test]
#[ignore]
#[cfg(feature = "ignored-tests")]
fn $name_int() {
$name_test(Factory::new(VMType::Interpreter));
}
}
);