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//go:build tinygo.wasm
package runtime
import (
"unsafe"
)
// Implements __wasi_iovec_t.
type __wasi_iovec_t struct {
buf unsafe.Pointer
bufLen uint
}
//go:wasm-module wasi_snapshot_preview1
//export fd_write
func fd_write(id uint32, iovs *__wasi_iovec_t, iovs_len uint, nwritten *uint) (errno uint)
// See:
// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#-proc_exitrval-exitcode
//
//go:wasm-module wasi_snapshot_preview1
//export proc_exit
func proc_exit(exitcode uint32)
const (
putcharBufferSize = 120
stdout = 1
)
// Using global variables to avoid heap allocation.
var (
putcharBuffer = [putcharBufferSize]byte{}
putcharPosition uint = 0
putcharIOVec = __wasi_iovec_t{
buf: unsafe.Pointer(&putcharBuffer[0]),
}
putcharNWritten uint
)
func putchar(c byte) {
putcharBuffer[putcharPosition] = c
putcharPosition++
if c == '\n' || putcharPosition >= putcharBufferSize {
putcharIOVec.bufLen = putcharPosition
fd_write(stdout, &putcharIOVec, 1, &putcharNWritten)
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) {
mono = nanotime()
sec = mono / (1000 * 1000 * 1000)
nsec = int32(mono - sec*(1000*1000*1000))
return
}
// Abort executes the wasm 'unreachable' instruction.
func abort() {
trap()
}
//go:linkname syscall_Exit syscall.Exit
func syscall_Exit(code int) {
proc_exit(uint32(code))
}
// 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() {
}
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