long bitSize() {
      return (long) data.length() * Long.SIZE;
    }

    /**
     * Number of set bits (1s).
     *
     * <p>Note that because of concurrent set calls and uses of atomics, this bitCount is a (very)
     * close *estimate* of the actual number of bits set. It's not possible to do better than an
     * estimate without locking. Note that the number, if not exactly accurate, is *always*

}

// freezeServices will freeze all incoming S3 API calls.
// For each call, unfreezeServices must be called once.
func freezeServices() {
	// Use atomics for globalServiceFreeze, so we can read without locking.
	// We need a lock since we are need the 2 atomic values to remain in sync.
	globalServiceFreezeMu.Lock()
	// If multiple calls, first one creates channel.
	globalServiceFreezeCnt++
	if globalServiceFreezeCnt == 1 {

</table>

Atomics
=======

The runtime uses its own atomics package at `internal/runtime/atomic`.
This corresponds to `sync/atomic`, but functions have different names
for historical reasons and there are a few additional functions needed
by the runtime.

In general, we think hard about the uses of atomics in the runtime and
try to avoid unnecessary atomic operations. If access to a variable is

		{Name: "sm3", Feature: &ARM64.HasSM3},
		{Name: "sm4", Feature: &ARM64.HasSM4},
		{Name: "sve", Feature: &ARM64.HasSVE},
		{Name: "sve2", Feature: &ARM64.HasSVE2},
		{Name: "crc32", Feature: &ARM64.HasCRC32},
		{Name: "atomics", Feature: &ARM64.HasATOMICS},
		{Name: "asimdhp", Feature: &ARM64.HasASIMDHP},
		{Name: "cpuid", Feature: &ARM64.HasCPUID},
		{Name: "asimrdm", Feature: &ARM64.HasASIMDRDM},
		{Name: "fcma", Feature: &ARM64.HasFCMA},

import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.locks.LockSupport;
import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

//go:build unix

// When cross-compiling with clang to linux/armv5, atomics are emulated
// and cause a compiler warning. This results in a build failure since
// cgo uses -Werror. See #65290.
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wunknown-warning-option"
#pragma GCC diagnostic ignored "-Watomic-alignment"

#include <pthread.h>
#include <errno.h>
#include <stdio.h>

import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.locks.LockSupport;
import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

//		}
//	}
//	if uint32(overflow) > 0 {
//		emit entry for uint32(overflow), time
//	}
type profBuf struct {
	// accessed atomically
	r, w         profAtomic
	overflow     atomic.Uint64
	overflowTime atomic.Uint64
	eof          atomic.Uint32

	// immutable (excluding slice content)
	hdrsize uintptr
	data    []uint64
	tags    []unsafe.Pointer

	// owned by reader
	rNext       profIndex

import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit test for {@link AbstractScheduledService}.

import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit test for {@link AbstractScheduledService}.