public api and example update

examples/interpret.rs

@@ -2,7 +2,7 @@ extern crate parity_wasm;
 
 use std::env::args;
 
-use parity_wasm::ModuleInstanceInterface;
+use parity_wasm::{interpreter, ModuleInstanceInterface};
 
 fn main() {
     let args: Vec<_> = args().collect();
@@ -12,7 +12,13 @@ fn main() {
         return;
     }
 
-    let program = parity_wasm::ProgramInstance::new().expect("Failed to load program");
+    let program = parity_wasm::ProgramInstance::with_env_params(
+        interpreter::EnvParams {
+            total_stack: 128*1024,
+            total_memory: 2*1024*1024,
+            allow_memory_growth: false,
+        }
+    ).expect("Failed to load program");
     let module = parity_wasm::deserialize_file(&args[1]).expect("Failed to load module");
     let module = program.add_module("main", module).expect("Failed to initialize module");
     let argument: i32 = args[2].parse().expect("Integer argument required");

src/interpreter/mod.rs

@@ -76,3 +76,4 @@ pub use self::program::ProgramInstance;
 pub use self::value::RuntimeValue;
 pub use self::variable::VariableInstance;
 pub use self::env_native::{env_native_module, UserFunctions, UserFunction, UserFunctionExecutor};
+pub use self::env::EnvParams;