go-wasm/imports.go

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package wasm
/*
#include <stdlib.h>
extern void debug(void *context, int32_t a);
extern void wexit(void *context, int32_t a);
extern void wwrite(void *context, int32_t a);
extern void nanotime(void *context, int32_t a);
extern void walltime(void *context, int32_t a);
extern void scheduleCallback(void *context, int32_t a);
extern void clearScheduledCallback(void *context, int32_t a);
extern void getRandomData(void *context, int32_t a);
extern void stringVal(void *context, int32_t a);
extern void valueGet(void *context, int32_t a);
extern void valueSet(void *context, int32_t a);
extern void valueIndex(void *context, int32_t a);
extern void valueSetIndex(void *context, int32_t a);
extern void valueCall(void *context, int32_t a);
extern void valueInvoke(void *context, int32_t a);
extern void valueNew(void *context, int32_t a);
extern void valueLength(void *context, int32_t a);
extern void valuePrepareString(void *context, int32_t a);
extern void valueLoadString(void *context, int32_t a);
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extern void scheduleTimeoutEvent(void *context, int32_t a);
extern void clearTimeoutEvent(void *context, int32_t a);
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*/
import "C"
import (
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"crypto/rand"
"encoding/binary"
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"fmt"
"log"
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"time"
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"unsafe"
"github.com/wasmerio/go-ext-wasm/wasmer"
)
//export debug
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func debug(ctx unsafe.Pointer, sp int32) {
log.Println(sp)
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}
//export wexit
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func wexit(ctx unsafe.Pointer, sp int32) {
b := getBridge(ctx)
b.vmExit = true
mem := b.mem()
b.exitCode = int(binary.LittleEndian.Uint32(mem[sp+8:]))
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}
//export wwrite
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func wwrite(ctx unsafe.Pointer, sp int32) {
fmt.Println("wasm write", sp)
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}
//export nanotime
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func nanotime(ctx unsafe.Pointer, sp int32) {
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n := time.Now().UnixNano()
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getBridge(ctx).setInt64(sp+8, n)
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}
//export walltime
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func walltime(ctx unsafe.Pointer, sp int32) {
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fmt.Println("wall time")
}
//export scheduleCallback
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func scheduleCallback(ctx unsafe.Pointer, sp int32) {
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fmt.Println("schedule callback")
}
//export clearScheduledCallback
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func clearScheduledCallback(ctx unsafe.Pointer, sp int32) {
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fmt.Println("clear scheduled callback")
}
//export getRandomData
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func getRandomData(ctx unsafe.Pointer, sp int32) {
s := getBridge(ctx).loadSlice(sp + 8)
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_, err := rand.Read(s)
if err != nil {
fmt.Println("failed: getRandomData", err)
}
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}
//export stringVal
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func stringVal(ctx unsafe.Pointer, sp int32) {
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fmt.Println("stringVal")
}
//export valueGet
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func valueGet(ctx unsafe.Pointer, sp int32) {
b := getBridge(ctx)
str := b.loadString(sp + 16)
val := b.loadValue(sp + 8)
fmt.Println("valueGet", str, val)
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}
//export valueSet
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func valueSet(ctx unsafe.Pointer, sp int32) {
str := getBridge(ctx).loadString(sp + 16)
fmt.Println("valueSet", str)
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}
//export valueIndex
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func valueIndex(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valueIndex")
}
//export valueSetIndex
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func valueSetIndex(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valueSetIndex")
}
//export valueCall
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func valueCall(ctx unsafe.Pointer, sp int32) {
str := getBridge(ctx).loadString(sp + 16)
fmt.Println("valueCall", str)
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}
//export valueInvoke
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func valueInvoke(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valueInvoke")
}
//export valueNew
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func valueNew(ctx unsafe.Pointer, sp int32) {
str := getBridge(ctx).loadString(sp + 16)
fmt.Println("valueNew", str)
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}
//export valueLength
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func valueLength(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valueLength")
}
//export valuePrepareString
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func valuePrepareString(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valuePrepareString")
}
//export valueLoadString
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func valueLoadString(ctx unsafe.Pointer, sp int32) {
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fmt.Println("valueLoadString")
}
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//export scheduleTimeoutEvent
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func scheduleTimeoutEvent(ctx unsafe.Pointer, sp int32) {
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fmt.Println("scheduleTimeoutEvent")
}
//export clearTimeoutEvent
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func clearTimeoutEvent(ctx unsafe.Pointer, sp int32) {
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fmt.Println("clearTimeoutEvent")
}
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// addImports adds go Bridge imports in "go" namespace.
func (b *Bridge) addImports(imps *wasmer.Imports) error {
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imps = imps.Namespace("go")
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var is = []struct {
name string
imp interface{}
cgo unsafe.Pointer
}{
{"debug", debug, C.debug},
{"runtime.wasmExit", wexit, C.wexit},
{"runtime.wasmWrite", wwrite, C.wwrite},
{"runtime.nanotime", nanotime, C.nanotime},
{"runtime.walltime", walltime, C.walltime},
{"runtime.scheduleCallback", scheduleCallback, C.scheduleCallback},
{"runtime.clearScheduledCallback", clearScheduledCallback, C.clearScheduledCallback},
{"runtime.getRandomData", getRandomData, C.getRandomData},
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{"runtime.scheduleTimeoutEvent", scheduleTimeoutEvent, C.scheduleTimeoutEvent},
{"runtime.clearTimeoutEvent", clearTimeoutEvent, C.clearTimeoutEvent},
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{"syscall/js.stringVal", stringVal, C.stringVal},
{"syscall/js.valueGet", valueGet, C.valueGet},
{"syscall/js.valueSet", valueSet, C.valueSet},
{"syscall/js.valueIndex", valueIndex, C.valueIndex},
{"syscall/js.valueSetIndex", valueSetIndex, C.valueSetIndex},
{"syscall/js.valueCall", valueCall, C.valueCall},
{"syscall/js.valueInvoke", valueInvoke, C.valueInvoke},
{"syscall/js.valueNew", valueNew, C.valueNew},
{"syscall/js.valueLength", valueLength, C.valueLength},
{"syscall/js.valuePrepareString", valuePrepareString, C.valuePrepareString},
{"syscall/js.valueLoadString", valueLoadString, C.valueLoadString},
}
var err error
for _, imp := range is {
imps, err = imps.Append(imp.name, imp.imp, imp.cgo)
if err != nil {
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return err
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}
}
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return nil
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}