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https://github.com/tinygo-org/tinygo.git
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Ayke van Laethem
3021e16bbf
This flushes stdio, so that functions like puts and printf write out all buffered data even if the output isn't connected to a terminal. For discussion, see: https://github.com/bytecodealliance/wasmtime/issues/7833
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
//go:build wasm && !wasip1
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package runtime
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import "unsafe"
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type timeUnit float64 // time in milliseconds, just like Date.now() in JavaScript
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// wasmNested is used to detect scheduler nesting (WASM calls into JS calls back into WASM).
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// When this happens, we need to use a reduced version of the scheduler.
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var wasmNested bool
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//export _start
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func _start() {
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// These need to be initialized early so that the heap can be initialized.
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heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
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heapEnd = uintptr(wasm_memory_size(0) * wasmPageSize)
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wasmNested = true
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run()
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__stdio_exit()
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wasmNested = false
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}
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var handleEvent func()
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//go:linkname setEventHandler syscall/js.setEventHandler
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func setEventHandler(fn func()) {
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handleEvent = fn
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}
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func ticksToNanoseconds(ticks timeUnit) int64 {
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// The JavaScript API works in float64 milliseconds, so convert to
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// nanoseconds first before converting to a timeUnit (which is a float64),
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// to avoid precision loss.
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return int64(ticks * 1e6)
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}
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func nanosecondsToTicks(ns int64) timeUnit {
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// The JavaScript API works in float64 milliseconds, so convert to timeUnit
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// (which is a float64) first before dividing, to avoid precision loss.
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return timeUnit(ns) / 1e6
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}
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// This function is called by the scheduler.
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// Schedule a call to runtime.scheduler, do not actually sleep.
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//
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//go:wasmimport gojs runtime.sleepTicks
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func sleepTicks(d timeUnit)
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//go:wasmimport gojs runtime.ticks
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func ticks() timeUnit
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