958ce19c0b
This deduplicates examples, leaving only the most maintained or targeted ones. Notably, this makes each runnable, avoiding test dependencies. Signed-off-by: Adrian Cole <adrian@tetrate.io>
70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
package main
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import (
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_ "embed"
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"fmt"
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"log"
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"os"
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"strconv"
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"github.com/tetratelabs/wazero"
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"github.com/tetratelabs/wazero/api"
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)
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// main implements a basic function in both Go and WebAssembly.
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func main() {
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// Create a new WebAssembly Runtime.
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r := wazero.NewRuntime()
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// Add a module to the runtime named "wasm/math" which exports one function "add", implemented in WebAssembly.
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wasm, err := r.InstantiateModuleFromCode([]byte(`(module $wasm/math
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(func $add (param i32 i32) (result i32)
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local.get 0
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local.get 1
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i32.add
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)
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(export "add" (func $add))
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)`))
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if err != nil {
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log.Fatal(err)
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}
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defer wasm.Close()
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// Add a module to the runtime named "host/math" which exports one function "add", implemented in Go.
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host, err := r.NewModuleBuilder("host/math").
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ExportFunction("add", func(v1, v2 uint32) uint32 {
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return v1 + v2
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}).Instantiate()
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if err != nil {
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log.Fatal(err)
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}
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defer host.Close()
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// Read two args to add.
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x, y := readTwoArgs()
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// Call the same function in both modules and print the results to the console.
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for _, mod := range []api.Module{wasm, host} {
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add := mod.ExportedFunction("add")
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results, err := add.Call(nil, x, y)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("%s: %d + %d = %d\n", mod.Name(), x, y, results[0])
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}
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}
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func readTwoArgs() (uint64, uint64) {
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x, err := strconv.ParseUint(os.Args[1], 10, 64)
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if err != nil {
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log.Fatalf("invalid arg %v: %v", os.Args[1], err)
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}
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y, err := strconv.ParseUint(os.Args[2], 10, 64)
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if err != nil {
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log.Fatalf("invalid arg %v: %v", os.Args[2], err)
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}
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return x, y
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}
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