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//go:build wasip2
package runtime
import (
"internal/cm"
exit "internal/wasi/cli/v0.2.0/exit"
stdout "internal/wasi/cli/v0.2.0/stdout"
monotonicclock "internal/wasi/clocks/v0.2.0/monotonic-clock"
wallclock "internal/wasi/clocks/v0.2.0/wall-clock"
random "internal/wasi/random/v0.2.0/random"
)
const putcharBufferSize = 120
// Using global variables to avoid heap allocation.
var (
putcharStdout = stdout.GetStdout()
putcharBuffer = [putcharBufferSize]byte{}
putcharPosition uint = 0
)
func putchar(c byte) {
putcharBuffer[putcharPosition] = c
putcharPosition++
if c == '\n' || putcharPosition >= putcharBufferSize {
list := cm.NewList(&putcharBuffer[0], putcharPosition)
putcharStdout.BlockingWriteAndFlush(list) // error return ignored; can't do anything anyways
putcharPosition = 0
}
}
func getchar() byte {
// dummy, TODO
return 0
}
func buffered() int {
// dummy, TODO
return 0
}
//go:linkname now time.now
func now() (sec int64, nsec int32, mono int64) {
now := wallclock.Now()
sec = int64(now.Seconds)
nsec = int32(now.Nanoseconds)
mono = int64(monotonicclock.Now())
return
}
// Abort executes the wasm 'unreachable' instruction.
func abort() {
trap()
}
//go:linkname syscall_Exit syscall.Exit
func syscall_Exit(code int) {
exit.Exit(code != 0)
}
func mainReturnExit() {
// WASIp2 does not use _start, instead it uses _initialize and a custom
// WASIp2-specific main function. So this should never be called in
// practice.
runtimePanic("unreachable: _start was called")
}
// TinyGo does not yet support any form of parallelism on WebAssembly, so these
// can be left empty.
//go:linkname procPin sync/atomic.runtime_procPin
func procPin() {
}
//go:linkname procUnpin sync/atomic.runtime_procUnpin
func procUnpin() {
}
func hardwareRand() (n uint64, ok bool) {
return random.GetRandomU64(), true
}
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