9364eb1d98
* Compute instance exports on demand. Instead having instances eagerly compute a Vec of Externs, and bumping the refcount for each Extern, compute Externs on demand. This also enables `Instance::get_export` to avoid doing a linear search. This also means that the closure returned by `get0` and friends now holds an `InstanceHandle` to dynamically hold the instance live rather than being scoped to a lifetime. * Compute module imports and exports on demand too. And compute Extern::ty on demand too. * Add a utility function for computing an ExternType. * Add a utility function for looking up a function's signature. * Add a utility function for computing the ValType of a Global. * Rename wasmtime_environ::Export to EntityIndex. This helps differentiate it from other Export types in the tree, and describes what it is. * Fix a typo in a comment. * Simplify module imports and exports. * Make `Instance::exports` return the export names. This significantly simplifies the public API, as it's relatively common to need the names, and this avoids the need to do a zip with `Module::exports`. This also changes `ImportType` and `ExportType` to have public members instead of private members and accessors, as I find that simplifies the usage particularly in cases where there are temporary instances. * Remove `Instance::module`. This doesn't quite remove `Instance`'s `module` member, it gets a step closer. * Use a InstanceHandle utility function. * Don't consume self in the `Func::get*` methods. Instead, just create a closure containing the instance handle and the export for them to call. * Use `ExactSizeIterator` to avoid needing separate `num_*` methods. * Rename `Extern::func()` etc. to `into_func()` etc. * Revise examples to avoid using `nth`. * Add convenience methods to instance for getting specific extern types. * Use the convenience functions in more tests and examples. * Avoid cloning strings for `ImportType` and `ExportType`. * Remove more obviated clone() calls. * Simplify `Func`'s closure state. * Make wasmtime::Export's fields private. This makes them more consistent with ExportType. * Fix compilation error. * Make a lifetime parameter explicit, and use better lifetime names. Instead of 'me, use 'instance and 'module to make it clear what the lifetime is. * More lifetime cleanups.
77 lines
1.9 KiB
Rust
77 lines
1.9 KiB
Rust
use crate::{wasm_extern_t, wasm_memorytype_t, wasm_store_t, ExternHost};
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use wasmtime::{HostRef, Memory};
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#[derive(Clone)]
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#[repr(transparent)]
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pub struct wasm_memory_t {
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ext: wasm_extern_t,
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}
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wasmtime_c_api_macros::declare_ref!(wasm_memory_t);
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pub type wasm_memory_pages_t = u32;
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impl wasm_memory_t {
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pub(crate) fn try_from(e: &wasm_extern_t) -> Option<&wasm_memory_t> {
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match &e.which {
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ExternHost::Memory(_) => Some(unsafe { &*(e as *const _ as *const _) }),
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_ => None,
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}
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}
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fn memory(&self) -> &HostRef<Memory> {
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match &self.ext.which {
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ExternHost::Memory(m) => m,
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_ => unsafe { std::hint::unreachable_unchecked() },
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}
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}
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fn anyref(&self) -> wasmtime::AnyRef {
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self.memory().anyref()
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}
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_new(
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store: &wasm_store_t,
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mt: &wasm_memorytype_t,
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) -> Box<wasm_memory_t> {
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let memory = HostRef::new(Memory::new(&store.store.borrow(), mt.ty().ty.clone()));
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Box::new(wasm_memory_t {
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ext: wasm_extern_t {
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which: ExternHost::Memory(memory),
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},
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})
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_as_extern(m: &wasm_memory_t) -> &wasm_extern_t {
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&m.ext
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_type(m: &wasm_memory_t) -> Box<wasm_memorytype_t> {
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let ty = m.memory().borrow().ty();
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Box::new(wasm_memorytype_t::new(ty))
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_data(m: &wasm_memory_t) -> *mut u8 {
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m.memory().borrow().data_ptr()
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_data_size(m: &wasm_memory_t) -> usize {
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m.memory().borrow().data_size()
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_size(m: &wasm_memory_t) -> wasm_memory_pages_t {
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m.memory().borrow().size()
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}
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#[no_mangle]
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pub extern "C" fn wasm_memory_grow(m: &wasm_memory_t, delta: wasm_memory_pages_t) -> bool {
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m.memory().borrow().grow(delta).is_ok()
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}
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