openethereum/ethcore/src/evm/factory.rs

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// 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/>.
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//! Evm factory.
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//!
//! TODO: consider spliting it into two separate files.
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#[cfg(test)]
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use std::fmt;
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use evm::Evm;
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#[derive(Clone)]
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/// Type of EVM to use.
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pub enum VMType {
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/// JIT EVM
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#[cfg(feature = "jit")]
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Jit,
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/// RUST EVM
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Interpreter
}
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#[cfg(test)]
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impl fmt::Display for VMType {
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#[cfg(feature="jit")]
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", match *self {
VMType::Jit => "JIT",
VMType::Interpreter => "INT"
})
}
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#[cfg(not(feature="jit"))]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", match *self {
VMType::Interpreter => "INT"
})
}
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}
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#[cfg(test)]
#[cfg(feature = "json-tests")]
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impl VMType {
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/// Return all possible VMs (JIT, Interpreter)
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#[cfg(feature = "jit")]
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pub fn all() -> Vec<VMType> {
vec![VMType::Jit, VMType::Interpreter]
}
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/// Return all possible VMs (Interpreter)
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#[cfg(not(feature = "jit"))]
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pub fn all() -> Vec<VMType> {
vec![VMType::Interpreter]
}
}
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/// Evm factory. Creates appropriate Evm.
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pub struct Factory {
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evm: VMType
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}
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impl Factory {
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/// Create fresh instance of VM
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#[cfg(feature = "jit")]
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pub fn create(&self) -> Box<Evm> {
match self.evm {
VMType::Jit => {
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Box::new(super::jit::JitEvm)
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},
VMType::Interpreter => {
Box::new(super::interpreter::Interpreter)
}
}
}
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/// Create fresh instance of VM
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#[cfg(not(feature = "jit"))]
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pub fn create(&self) -> Box<Evm> {
match self.evm {
VMType::Interpreter => {
Box::new(super::interpreter::Interpreter)
}
}
}
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/// Create new instance of specific `VMType` factory
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#[cfg(test)]
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pub fn new(evm: VMType) -> Factory {
Factory {
evm: evm
}
}
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}
impl Default for Factory {
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/// Returns jitvm factory
#[cfg(feature = "jit")]
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fn default() -> Factory {
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Factory {
evm: VMType::Jit
}
}
/// Returns native rust evm factory
#[cfg(not(feature = "jit"))]
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fn default() -> Factory {
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Factory {
evm: VMType::Interpreter
}
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}
}
#[test]
fn test_create_vm() {
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let _vm = Factory::default().create();
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}
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/// Create tests by injecting different VM factories
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#[macro_export]
macro_rules! evm_test(
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(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() {
$name_test(Factory::new(VMType::Interpreter));
}
};
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($name_test: ident: $name_jit: ident, $name_int: ident) => {
#[test]
#[cfg(feature = "jit")]
fn $name_jit() {
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$name_test(Factory::new(VMType::Jit));
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}
#[test]
fn $name_int() {
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$name_test(Factory::new(VMType::Interpreter));
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}
}
);
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/// 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));
}
}
);