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Makes all examples and docs use Runtime.Close (#537)

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This removes tedium in our examples and docs by using `Runtime.Close`
instead of tracking everything. Internal tests still track too much, but
anyway at least this stops suggesting others should do it.

This also changes our examples to use log.PanicXX so that the line
number goes into the console output.

Signed-off-by: Adrian Cole <adrian@tetrate.io>
This commit is contained in:
Crypt Keeper
2022-05-10 12:08:25 +08:00
committed by GitHub
parent 8dd797e108
commit 03bfa31928
17 changed files with 127 additions and 109 deletions
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13
examples/basic/add.go
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@@ -19,6 +19,7 @@ func main() {
// Create a new WebAssembly Runtime.
r := wazero.NewRuntime()
defer r.Close(ctx) // This closes everything this Runtime created.
// Add a module to the runtime named "wasm/math" which exports one function "add", implemented in WebAssembly.
wasm, err := r.InstantiateModuleFromCode(ctx, []byte(`(module $wasm/math
@@ -30,9 +31,8 @@ func main() {
(export "add" (func $add))
)`))
if err != nil {
log.Fatal(err)
log.Panicln(err)
}
defer wasm.Close(ctx)
// Add a module to the runtime named "host/math" which exports one function "add", implemented in Go.
host, err := r.NewModuleBuilder("host/math").
@@ -40,9 +40,8 @@ func main() {
return v1 + v2
}).Instantiate(ctx)
if err != nil {
log.Fatal(err)
log.Panicln(err)
}
defer host.Close(ctx)
// Read two args to add.
x, y := readTwoArgs()
@@ -52,7 +51,7 @@ func main() {
add := mod.ExportedFunction("add")
results, err := add.Call(ctx, x, y)
if err != nil {
log.Fatal(err)
log.Panicln(err)
}
fmt.Printf("%s: %d + %d = %d\n", mod.Name(), x, y, results[0])
@@ -62,12 +61,12 @@ func main() {
func readTwoArgs() (uint64, uint64) {
x, err := strconv.ParseUint(os.Args[1], 10, 64)
if err != nil {
log.Fatalf("invalid arg %v: %v", os.Args[1], err)
log.Panicf("invalid arg %v: %v", os.Args[1], err)
}
y, err := strconv.ParseUint(os.Args[2], 10, 64)
if err != nil {
log.Fatalf("invalid arg %v: %v", os.Args[2], err)
log.Panicf("invalid arg %v: %v", os.Args[2], err)
}
return x, y
}