mirror of
https://github.com/BinomialLLC/basis_universal.git
synced 2026-06-08 00:23:52 +00:00
59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
import wasmtime
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import ctypes
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# --- Engine ---
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engine = wasmtime.Engine()
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# --- Store ---
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store = wasmtime.Store(engine)
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# --- WASI config ---
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wasi = wasmtime.WasiConfig()
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wasi.argv = ["basisu_module_st"]
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wasi.inherit_stdout() # <-- tell WASI to use the host stdout
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wasi.inherit_stderr()
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store.set_wasi(wasi)
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# --- Load module ---
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module = wasmtime.Module.from_file(engine, "basisu_py/wasm/basisu_module_st.wasm")
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# --- Linker + WASI ---
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linker = wasmtime.Linker(engine)
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linker.define_wasi()
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# --- Instantiate ---
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instance = linker.instantiate(store, module)
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print("Single-threaded WASM instantiated OK")
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# --- Exports ---
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exports = instance.exports(store)
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get_version = exports["bu_get_version"]
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alloc = exports["bu_alloc"]
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free = exports["bu_free"]
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memory = exports["memory"]
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# --- Version ---
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version = get_version(store)
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print("Version =", version)
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# --- Alloc ---
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ptr = alloc(store, 64)
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print("Allocated ptr =", ptr)
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# --- Access WASM memory properly ---
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data_len = memory.data_len(store)
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raw_ptr = memory.data_ptr(store) # ctypes pointer
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addr = ctypes.addressof(raw_ptr.contents) # convert to integer pointer
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# Create a byte array view into WASM memory
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buf = (ctypes.c_ubyte * data_len).from_address(addr)
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# Write TEST at allocated ptr
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buf[ptr : ptr + 4] = b"TEST"
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print("Wrote TEST into WASM memory.")
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# --- Free ---
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free(store, ptr)
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print("Memory free OK.")
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