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8284161: Implementation of Virtual Threads (Preview)

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Co-authored-by: Ron Pressler <rpressler@openjdk.org>
Co-authored-by: Alan Bateman <alanb@openjdk.org>
Co-authored-by: Erik Österlund <eosterlund@openjdk.org>
Co-authored-by: Andrew Haley <aph@openjdk.org>
Co-authored-by: Rickard Bäckman <rbackman@openjdk.org>
Co-authored-by: Markus Grönlund <mgronlun@openjdk.org>
Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org>
Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org>
Co-authored-by: Chris Plummer <cjplummer@openjdk.org>
Co-authored-by: Coleen Phillimore <coleenp@openjdk.org>
Co-authored-by: Robbin Ehn <rehn@openjdk.org>
Co-authored-by: Stefan Karlsson <stefank@openjdk.org>
Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org>
Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org>
Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
This commit is contained in:
Alan Bateman 2022-05-07 08:06:16 +00:00
parent 5212535a27
commit 9583e3657e
1133 changed files with 95935 additions and 8335 deletions
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29
src/java.base/share/classes/java/net/InetAddress.java
View file

@ -55,10 +55,10 @@ import java.util.Arrays;
import java.util.concurrent.locks.ReentrantLock;
import java.util.stream.Stream;
import jdk.internal.misc.VM;
import jdk.internal.access.JavaNetInetAddressAccess;
import jdk.internal.access.SharedSecrets;
import jdk.internal.misc.Blocker;
import jdk.internal.misc.VM;
import jdk.internal.vm.annotation.Stable;
import sun.net.ResolverProviderConfiguration;
import sun.security.action.*;
@ -972,6 +972,7 @@ public sealed class InetAddress implements Serializable permits Inet4Address, In
// in cache when the result is obtained
private static final class NameServiceAddresses implements Addresses {
private final String host;
private final ReentrantLock lookupLock = new ReentrantLock();
NameServiceAddresses(String host) {
this.host = host;
@ -982,7 +983,8 @@ public sealed class InetAddress implements Serializable permits Inet4Address, In
Addresses addresses;
// only one thread is doing lookup to name service
// for particular host at any time.
synchronized (this) {
lookupLock.lock();
try {
// re-check that we are still us + re-install us if slot empty
addresses = cache.putIfAbsent(host, this);
if (addresses == null) {
@ -1030,6 +1032,8 @@ public sealed class InetAddress implements Serializable permits Inet4Address, In
return inetAddresses;
}
// else addresses != this
} finally {
lookupLock.unlock();
}
// delegate to different addresses when we are already replaced
// but outside of synchronized block to avoid any chance of dead-locking
@ -1049,16 +1053,27 @@ public sealed class InetAddress implements Serializable permits Inet4Address, In
throws UnknownHostException {
Objects.requireNonNull(host);
Objects.requireNonNull(policy);
return Arrays.stream(impl.lookupAllHostAddr(host, policy));
InetAddress[] addrs;
long comp = Blocker.begin();
try {
addrs = impl.lookupAllHostAddr(host, policy);
} finally {
Blocker.end(comp);
}
return Arrays.stream(addrs);
}
public String lookupByAddress(byte[] addr)
throws UnknownHostException {
public String lookupByAddress(byte[] addr) throws UnknownHostException {
Objects.requireNonNull(addr);
if (addr.length != Inet4Address.INADDRSZ && addr.length != Inet6Address.INADDRSZ) {
throw new IllegalArgumentException("Invalid address length");
}
return impl.getHostByAddr(addr);
long comp = Blocker.begin();
try {
return impl.getHostByAddr(addr);
} finally {
Blocker.end(comp);
}
}
}