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Update & clean pwasm-emscripten/src/lib.rs

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This commit is contained in:
Sergey Pepyakin 2017-11-28 18:16:30 +03:00
parent bb1e0d93cc
commit d1ec18f757
1 changed files with 6 additions and 19 deletions
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25
pwasm-emscripten/src/lib.rs
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@ -38,7 +38,7 @@ const INDEX_TABLE: u32 = 0;
const LINEAR_MEMORY_PAGE_SIZE: u32 = 64 * 1024;
/// Emscripten environment parameters.
pub struct EnvParams {
pub struct EmscriptenParams {
/// Stack size in bytes.
pub total_stack: u32,
/// Total memory size in bytes.
@ -52,7 +52,6 @@ pub struct EnvParams {
}
struct EmscriptenFunctionExecutor {
abort_global: Arc<VariableInstance>,
total_mem_global: Arc<VariableInstance>,
}
@ -64,13 +63,11 @@ impl<'a> UserFunctionExecutor for EmscriptenFunctionExecutor {
) -> Result<Option<RuntimeValue>, Error> {
match name {
"_abort" | "abort" => {
self.abort_global.set(RuntimeValue::I32(1))?;
Err(Error::Trap("abort".into()).into())
}
"assert" => {
let condition = context.value_stack.pop_as::<i32>()?;
if condition == 0 {
self.abort_global.set(RuntimeValue::I32(1))?;
Err(Error::Trap("assertion failed".into()))
} else {
Ok(None)
@ -89,7 +86,7 @@ impl<'a> UserFunctionExecutor for EmscriptenFunctionExecutor {
}
}
pub fn env_module(params: EnvParams) -> Result<Arc<ModuleInstanceInterface>, Error> {
pub fn env_module(params: EmscriptenParams) -> Result<Arc<ModuleInstanceInterface>, Error> {
debug_assert!(params.total_stack < params.total_memory);
debug_assert!((params.total_stack % LINEAR_MEMORY_PAGE_SIZE) == 0);
debug_assert!((params.total_memory % LINEAR_MEMORY_PAGE_SIZE) == 0);
@ -115,14 +112,6 @@ pub fn env_module(params: EnvParams) -> Result<Arc<ModuleInstanceInterface>, Err
instance.instantiate(None)?;
Arc::new(instance)
};
let abort_global = Arc::new(
VariableInstance::new(
false,
VariableType::I32,
RuntimeValue::I32(0)
).unwrap()
);
let total_mem_global = Arc::new(
VariableInstance::new(
false,
@ -132,7 +121,6 @@ pub fn env_module(params: EnvParams) -> Result<Arc<ModuleInstanceInterface>, Err
);
let function_executor = EmscriptenFunctionExecutor {
abort_global: Arc::clone(&abort_global),
total_mem_global: Arc::clone(&total_mem_global),
};
@ -224,7 +212,6 @@ pub fn env_module(params: EnvParams) -> Result<Arc<ModuleInstanceInterface>, Err
),
),
("TOTAL_MEMORY".into(), total_mem_global),
("ABORT".into(), abort_global),
].into_iter()
.collect(),
functions: ::std::borrow::Cow::from(SIGNATURES),
@ -233,9 +220,9 @@ pub fn env_module(params: EnvParams) -> Result<Arc<ModuleInstanceInterface>, Err
Ok(native_module(instance, elements)?)
}
impl Default for EnvParams {
impl Default for EmscriptenParams {
fn default() -> Self {
EnvParams {
EmscriptenParams {
total_stack: DEFAULT_TOTAL_STACK,
total_memory: DEFAULT_TOTAL_MEMORY,
allow_memory_growth: DEFAULT_ALLOW_MEMORY_GROWTH,
@ -245,13 +232,13 @@ impl Default for EnvParams {
}
}
impl EnvParams {
impl EmscriptenParams {
fn max_memory(&self) -> Option<u32> {
if self.allow_memory_growth { None } else { Some(self.total_memory) }
}
}
pub fn program_with_emscripten_env(params: EnvParams) -> Result<ProgramInstance, Error> {
pub fn program_with_emscripten_env(params: EmscriptenParams) -> Result<ProgramInstance, Error> {
let program = ProgramInstance::new();
program.insert_loaded_module("env", env_module(params)?)?;
Ok(program)