97 lines
2.5 KiB
Rust
97 lines
2.5 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Evm factory.
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//!
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use std::sync::Arc;
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use vm::Vm;
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use ethereum_types::U256;
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use super::interpreter::SharedCache;
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use super::vmtype::VMType;
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/// Evm factory. Creates appropriate Evm.
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#[derive(Clone)]
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pub struct Factory {
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evm: VMType,
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evm_cache: Arc<SharedCache>,
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}
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impl Factory {
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/// Create fresh instance of VM
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/// Might choose implementation depending on supplied gas.
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pub fn create(&self, gas: &U256) -> Box<Vm> {
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match self.evm {
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VMType::Interpreter => if Self::can_fit_in_usize(gas) {
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Box::new(super::interpreter::Interpreter::<usize>::new(self.evm_cache.clone()))
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} else {
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Box::new(super::interpreter::Interpreter::<U256>::new(self.evm_cache.clone()))
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}
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}
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}
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/// Create new instance of specific `VMType` factory, with a size in bytes
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/// for caching jump destinations.
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pub fn new(evm: VMType, cache_size: usize) -> Self {
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Factory {
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evm: evm,
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evm_cache: Arc::new(SharedCache::new(cache_size)),
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}
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}
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fn can_fit_in_usize(gas: &U256) -> bool {
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gas == &U256::from(gas.low_u64() as usize)
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}
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}
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impl Default for Factory {
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/// Returns native rust evm factory
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fn default() -> Factory {
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Factory {
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evm: VMType::Interpreter,
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evm_cache: Arc::new(SharedCache::default()),
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}
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}
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}
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#[test]
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fn test_create_vm() {
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let _vm = Factory::default().create(&U256::zero());
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}
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/// Create tests by injecting different VM factories
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#[macro_export]
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macro_rules! evm_test(
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($name_test: ident: $name_int: ident) => {
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#[test]
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fn $name_int() {
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$name_test(Factory::new(VMType::Interpreter, 1024 * 32));
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}
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}
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);
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/// Create ignored tests by injecting different VM factories
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#[macro_export]
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macro_rules! evm_test_ignore(
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($name_test: ident: $name_int: ident) => {
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#[test]
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#[ignore]
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#[cfg(feature = "ignored-tests")]
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fn $name_int() {
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$name_test(Factory::new(VMType::Interpreter, 1024 * 32));
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}
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}
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);
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