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 externref(&self) -> wasmtime::ExternRef {
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self.memory().externref()
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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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