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user-functions initial

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This commit is contained in:
NikVolf
2017-05-15 13:58:55 +03:00
parent f07bf5b367
commit 21ff1509f6
2 changed files with 59 additions and 23 deletions
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68
src/interpreter/env.rs
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@ -1,4 +1,6 @@
use std::sync::{Arc, Weak};
use std::collections::HashMap;
use builder::module;
use elements::{Module, FunctionType, ExportEntry, Internal, GlobalEntry, GlobalType,
ValueType, InitExpr, Opcode, Opcodes};
@ -67,6 +69,19 @@ const INDEX_FUNC_MIN_NONUSED: u32 = 7;
/// Max index of reserved function.
const INDEX_FUNC_MAX: u32 = 10000;
/// Set of user-defined functions
pub type UserFunctions = HashMap<String, UserFunction>;
/// User function closure
pub type UserFunctionClosure = Box<Fn(&CallerContext) -> Result<Option<RuntimeValue>, Error>>;
/// Signature of user-defined env function
pub struct UserFunction {
params: Vec<ValueType>,
result: Option<ValueType>,
closure: UserFunctionClosure,
}
/// Environment parameters.
pub struct EnvParams {
/// Stack size in bytes.
@ -77,17 +92,21 @@ pub struct EnvParams {
pub allow_memory_growth: bool,
}
type UserFunctionsInternals = HashMap<u32, UserFunctionClosure>;
pub struct EnvModuleInstance {
_params: EnvParams,
user_functions: UserFunctionsInternals,
instance: ModuleInstance,
}
impl EnvModuleInstance {
pub fn new(params: EnvParams, module: Module) -> Result<Self, Error> {
pub fn new(params: EnvParams, user_functions: UserFunctionsInternals, module: Module) -> Result<Self, Error> {
let instance = ModuleInstance::new(Weak::default(), module)?;
Ok(EnvModuleInstance {
_params: params,
user_functions: user_functions,
instance: instance,
})
}
@ -157,12 +176,12 @@ impl ModuleInstanceInterface for EnvModuleInstance {
}
}
pub fn env_module() -> Result<EnvModuleInstance, Error> {
let env_params = EnvParams::default();
pub fn env_module(user_functions: UserFunctions) -> Result<EnvModuleInstance, Error> {
let mut env_params = EnvParams::default();
debug_assert!(env_params.total_stack < env_params.total_memory);
debug_assert!((env_params.total_stack % LINEAR_MEMORY_PAGE_SIZE) == 0);
debug_assert!((env_params.total_memory % LINEAR_MEMORY_PAGE_SIZE) == 0);
let module = module()
let mut module = module()
// memory regions
.memory()
.with_min(env_params.total_memory / LINEAR_MEMORY_PAGE_SIZE)
@ -214,25 +233,32 @@ pub fn env_module() -> Result<EnvModuleInstance, Error> {
.body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
.build()
.with_export(ExportEntry::new("getTotalMemory".into(), Internal::Function(INDEX_FUNC_GET_TOTAL_MEMORY)))
// non-standard functions (TODO: pass as parameters to EnvModuleInstance)
.function()
.signature().param().i32().build()
.body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
.build()
.with_export(ExportEntry::new("gas".into(), Internal::Function(INDEX_FUNC_MAX + 1)))
.function()
.signature().return_type().i32().build()
.body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
.build()
.with_export(ExportEntry::new("_storage_size".into(), Internal::Function(INDEX_FUNC_MAX + 2)))
.function()
.signature().param().i32().param().i32().param().i32().return_type().i32().build()
.body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
.build()
.with_export(ExportEntry::new("_storage_write".into(), Internal::Function(INDEX_FUNC_MAX + 3)))
.build();
// non-standard functions (TODO: pass as parameters to EnvModuleInstance)
// .function()
// .signature().param().i32().build()
// .body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
// .build()
// .with_export(ExportEntry::new("gas".into(), Internal::Function(INDEX_FUNC_MAX + 1)))
// .function()
// .signature().return_type().i32().build()
// .body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
// .build()
// .with_export(ExportEntry::new("_storage_size".into(), Internal::Function(INDEX_FUNC_MAX + 2)))
// .function()
// .signature().param().i32().param().i32().param().i32().return_type().i32().build()
// .body().with_opcodes(Opcodes::new(vec![Opcode::Unreachable, Opcode::End])).build()
// .build()
// .with_export(ExportEntry::new("_storage_write".into(), Internal::Function(INDEX_FUNC_MAX + 3)))
// .build();
EnvModuleInstance::new(env_params, module)
let mut funcs = user_functions;
let internals = HashMap::new();
for (func_name, func) in funcs.drain() {
}
EnvModuleInstance::new(env_params, internals, module)
}
impl Default for EnvParams {