Struct gluon_vm::thread::RootedThread

pub struct RootedThread(_);

An instance of Thread which is rooted. See the Thread type for documentation on interacting with the type.

Methods

impl RootedThread

pub fn new() -> RootedThread

Creates a new virtual machine with an empty global environment

pub fn with_global_state(global_state: GlobalVmState) -> RootedThread

pub fn into_raw(self) -> *const Thread

Converts a RootedThread into a raw pointer allowing to be passed through a C api. The reference count for the thread is not modified

pub unsafe fn from_raw(ptr: *const Thread) -> RootedThread

Converts a raw pointer into a RootedThread. The reference count for the thread is not modified so it is up to the caller to ensure that the count is correct.

Methods from Deref<Target = Thread>

pub fn new_thread(&self) -> Result<RootedThread>

Spawns a new gluon thread with its own stack and heap but while still sharing the same global environment

pub fn root_thread(&self) -> RootedThread

Roots self, extending the lifetime of this thread until at least the returned RootedThread is droppped

pub fn define_global<'vm, T>(&'vm self, name: &str, value: T) -> Result<()> where
    T: Pushable<'vm> + VmType, 

Deprecated since 0.7.0:

Use gluon::import::add_extern_module instead

Creates a new global value at name. Fails if a global called name already exists.

Examples

Load the factorial rust function into gluon and evaluate factorial 5

fn factorial(x: i32) -> i32 {
    if x <= 1 { 1 } else { x * factorial(x - 1) }
}


let vm = new_vm();

vm.define_global("factorial", primitive!(1, factorial)).unwrap();

let result = Compiler::new()
    .run_expr::<i32>(&vm, "example", "factorial 5")
    .unwrap_or_else(|err| panic!("{}", err));
let expected = (120, Type::int());

assert_eq!(result, expected);

pub fn get_global<'vm, T>(&'vm self, name: &str) -> Result<T> where
    T: for<'value> Getable<'vm, 'value> + VmType, 

Retrieves the global called name.

Examples

Bind the (+) function in gluon's prelude standard library to an add function in rust

let vm = new_vm();

Compiler::new()
    .run_expr::<OpaqueValue<&Thread, Hole>>(&vm, "example",
        r#" import! std.int "#)
    .unwrap_or_else(|err| panic!("{}", err));
let mut add: FunctionRef<fn(i32, i32) -> i32> =
    vm.get_global("std.int.num.(+)").unwrap();
let result = add.call(1, 2);
assert_eq!(result, Ok(3));

Errors

if the global does not exist or it does not have the correct type.

pub fn get_global_type(&self, name: &str) -> Result<ArcType>

pub fn find_type_info(&self, name: &str) -> Result<Alias<Symbol, ArcType>>

Retrieves type information about the type name. Types inside records can be accessed using dot notation (std.prelude.Option)

pub fn get_type<T: ?Sized + Any>(&self) -> Option<ArcType>

Returns the gluon type that was bound to T

pub fn register_type<T: ?Sized + Any>(
    &self,
    name: &str,
    args: &[&str]
) -> Result<ArcType>

Registers the type T as being a gluon type called name with generic arguments args

pub fn register_type_as(
    &self,
    name: Symbol,
    alias: Alias<Symbol, ArcType>,
    id: TypeId
) -> Result<ArcType>

pub fn get_env<'b>(&'b self) -> RwLockReadGuard<'b, VmEnv>

Locks and retrieves the global environment of the vm

pub fn get_macros(&self) -> &MacroEnv

Retrieves the macros defined for this vm

pub fn collect(&self)

Runs a garbage collection.

pub fn push<'vm, T>(&'vm self, v: T) -> Result<()> where
    T: Pushable<'vm>, 

Pushes a value to the top of the stack

pub fn pop(&self)

Removes the top value from the stack

pub fn allocated_memory(&self) -> usize

pub fn set_memory_limit(&self, memory_limit: usize)

pub fn interrupt(&self)

pub fn interrupted(&self) -> bool

pub fn current_context(&self) -> ActiveThread

Trait Implementations

impl VmType for RootedThread

type Type = Thread

A version of Self which implements Any allowing a TypeId to be retrieved

fn make_forall_type(vm: &Thread) -> ArcType

fn make_type(vm: &Thread) -> ArcType

Creates an gluon type which maps to Self in rust

fn extra_args() -> VmIndex

How many extra arguments a function returning this type requires. Used for abstract types which when used in return position should act like they still need more arguments before they are called

impl<'vm> Pushable<'vm> for RootedThread

fn push(self, context: &mut ActiveThread<'vm>) -> Result<()>

Pushes self to stack. If the call is successful a single element should have been added to the stack and Ok(()) should be returned. If the call is unsuccessful Status:Error should be returned and the stack should be left intact

fn status_push(self, context: &mut ActiveThread<'vm>) -> Status where
    Self: Sized, 

unsafe fn marshal_unrooted(self, vm: &'vm Thread) -> Result<Value> where
    Self: Sized, 

fn marshal<T>(self, vm: &'vm Thread) -> Result<RootedValue<T>> where
    Self: Sized,
    T: VmRoot<'vm>, 

impl<'vm, 'value> Getable<'vm, 'value> for RootedThread

fn from_value(_: &'vm Thread, value: Variants<'value>) -> Self

impl Traverseable for RootedThread

fn traverse(&self, gc: &mut Gc)

impl<'a> VmRoot<'a> for RootedThread

fn root(thread: &'a Thread) -> Self

fn root_value_with_self(self, value: Variants) -> RootedValue<Self>

Roots a value

impl Drop for RootedThread

fn drop(&mut self)

Executes the destructor for this type.

impl Clone for RootedThread

fn clone(&self) -> RootedThread

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RootedThread

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Deref for RootedThread

type Target = Thread

The resulting type after dereferencing.

fn deref(&self) -> &Thread

Dereferences the value.