* limitations under the License.
 */
package org.gradle.cache.internal.btree;

public abstract class Block {
    static final int LONG_SIZE = 8;
    static final int INT_SIZE = 4;
    static final int SHORT_SIZE = 2;

    private BlockPayload payload;

    protected Block(BlockPayload payload) {
        this.payload = payload;
        payload.setBlock(this);
    }

	b1 = block & 0x0f0f00000f0f0000
	b2 = block & 0x0000f0f00000f0f0
	block ^= b1 ^ b2 ^ b1>>12 ^ b2<<12

	b1 = block >> 32 & 0xff00ff
	b2 = (block & 0xff00ff00)
	block ^= b1<<32 ^ b2 ^ b1<<8 ^ b2<<24

	b1 = block >> 48
	b2 = block << 48
	block ^= b1 ^ b2 ^ b1<<48 ^ b2>>48
	return block
}

// creates 16 28-bit blocks rotated according
// to the rotation schedule.

//	https://csrc.nist.gov/csrc/media/publications/fips/197/final/documents/fips-197.pdf
//	https://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf

package aes

import "internal/byteorder"

// Encrypt one block from src into dst, using the expanded key xk.
func encryptBlockGo(xk []uint32, dst, src []byte) {
	_ = src[15] // early bounds check
	s0 := byteorder.BeUint32(src[0:4])
	s1 := byteorder.BeUint32(src[4:8])

func (lm *LRWMutex) lock(id, source string, isWriteLock bool) (locked bool) {
	lm.mu.Lock()
	defer lm.mu.Unlock()

	lm.id = id
	lm.source = source
	if isWriteLock {
		if lm.ref == 0 && !lm.isWriteLock {
			lm.ref = 1
			lm.isWriteLock = true
			locked = true
		}
	} else {
		if !lm.isWriteLock {
			lm.ref++
			locked = true
		}
	}

	return locked
}

const (

			os.Exit(1)
		}
		// Exit with the thread locked, which should exit the
		// main thread.
		ready <- true
	}()
	<-ready
	time.Sleep(1 * time.Millisecond)
	// Check that this goroutine is still running on a different
	// thread.
	self := C.pthread_self()
	if C.pthread_equal(mainThread, self) != 0 {
		println("goroutine migrated to locked thread")
		os.Exit(1)
	}
	println("OK")
}

    private void assertNotLocked() {
        if (locked) {
            throw new IllegalStateException("class loader scope is locked, scope identifier is " + id);
        }
    }

    @Override
    public ClassLoaderScope lock() {
        locked = true;
        return this;
    }

    @Override
    public boolean isLocked() {
        return locked;
    }

    @Override

package lockedfile

import (
	"fmt"
	"io"
	"io/fs"
	"os"
	"runtime"
)

// A File is a locked *os.File.
//
// Closing the file releases the lock.
//
// If the program exits while a file is locked, the operating system releases
// the lock but may not do so promptly: callers must ensure that all locked
// files are closed before exiting.
type File struct {
	osFile
	closed bool
}

}

var (
	locked  atomic.Int32
	runGoid atomic.Uint64
	hooks   []Hook
	running bool

	// runtime sets these for us
	Gosched func()
	Goid    func() uint64
	Throw   func(string)
)

// Add adds a new exit hook.
func Add(h Hook) {
	for !locked.CompareAndSwap(0, 1) {
		Gosched()
	}
	hooks = append(hooks, h)
	locked.Store(0)
}

// Run runs the exit hooks.
//

     *
     * If {@code true}, each locked dependency is added as a strict constraint,
     * and the resolution result must exactly match the set of locked dependencies.
     *
     * If {@code false}, each locked dependency is added a regular (lenient) constraint,
     * and the resolution result is not verified against the set of locked dependencies.
     *

	"runtime/debug"
	"sync/atomic"
	"testing"
)

func parallelReader(m *RWMutex, clocked chan bool, cunlock *atomic.Bool, cdone chan bool) {
	m.RLock()
	clocked <- true
	for !cunlock.Load() {
	}
	m.RUnlock()
	cdone <- true
}

func doTestParallelReaders(numReaders int) {
	GOMAXPROCS(numReaders + 1)
	var m RWMutex
	m.Init()
	clocked := make(chan bool, numReaders)
	var cunlock atomic.Bool
	cdone := make(chan bool)