// license that can be found in the LICENSE file.

package main

import _ "unsafe" // for go:linkname

// Defined in the runtime package.
//
//go:linkname runtime_getm_for_test runtime.getm

}
*/
import "C"

import (
	"fmt"
	"os"
)

func init() {
	register("EnsureDropM", EnsureDropM)
}

var savedM uintptr

//export GoCheckM
func GoCheckM() {
	m := runtime_getm_for_test()
	if savedM == 0 {
		savedM = m
	} else if savedM != m {
		fmt.Printf("m == %x want %x\n", m, savedM)
		os.Exit(1)
	}
}

func EnsureDropM() {
	C.CheckM()
	fmt.Println("OK")

	if started.Load() != cThreadNum {
		// Only once for each thread, since it will wait all threads start.
		started.Add(1)
		for started.Load() < cThreadNum {
			runtime.Gosched()
		}
	}
	m := runtime_getm_for_test()
	mutex.Lock()
	defer mutex.Unlock()
	if savedM, ok := cThreadToM[thread]; ok && savedM != m {
		fmt.Printf("m == %x want %x\n", m, savedM)
		os.Exit(1)
	}
	cThreadToM[thread] = m
}