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//go:build wasm && !wasi
package runtime
import "unsafe"
type timeUnit float64 // time in milliseconds, just like Date.now() in JavaScript
// wasmNested is used to detect scheduler nesting (WASM calls into JS calls back into WASM).
// When this happens, we need to use a reduced version of the scheduler.
var wasmNested bool
//export _start
func _start() {
// These need to be initialized early so that the heap can be initialized.
heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
heapEnd = uintptr(wasm_memory_size(0) * wasmPageSize)
wasmNested = true
run()
wasmNested = false
}
var handleEvent func()
//go:linkname setEventHandler syscall/js.setEventHandler
func setEventHandler(fn func()) {
handleEvent = fn
}
func ticksToNanoseconds(ticks timeUnit) int64 {
// The JavaScript API works in float64 milliseconds, so convert to
// nanoseconds first before converting to a timeUnit (which is a float64),
// to avoid precision loss.
return int64(ticks * 1e6)
}
func nanosecondsToTicks(ns int64) timeUnit {
// The JavaScript API works in float64 milliseconds, so convert to timeUnit
// (which is a float64) first before dividing, to avoid precision loss.
return timeUnit(ns) / 1e6
}
// This function is called by the scheduler.
// Schedule a call to runtime.scheduler, do not actually sleep.
//
//go:wasmimport gojs runtime.sleepTicks
func sleepTicks(d timeUnit)
//go:wasmimport gojs runtime.ticks
func ticks() timeUnit
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