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Reorder PlatformDependent.isRoot() check

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Motivation:

isRoot() is an expensive operation. We should avoid calling it if
possible.

Modifications:

Move the isRoot() checks to the end of the 'if' block, so that isRoot()
is evaluated only when really necessary.

Result:

isRoot() is evaluated only when SO_BROADCAST is set and the bind address
is anylocal address.
This commit is contained in:
Trustin Lee 2015-02-08 11:54:40 +09:00
parent 3ca6e4bd54
commit 10a5635acb
3 changed files with 6 additions and 6 deletions
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2
common/src/main/java/io/netty/util/internal/PlatformDependent.java
View File

@ -459,7 +459,7 @@ public final class PlatformDependent {
return false;
}
String[] ID_COMMANDS = { "/usr/bin/id", "/bin/id", "id", "/usr/xpg4/bin/id"};
String[] ID_COMMANDS = { "/usr/bin/id", "/bin/id", "/usr/xpg4/bin/id", "id"};
Pattern UID_PATTERN = Pattern.compile("^(?:0|[1-9][0-9]*)$");
for (String idCmd: ID_COMMANDS) {
Process p = null;

6
transport/src/main/java/io/netty/channel/AbstractChannel.java
View File

@ -467,10 +467,10 @@ public abstract class AbstractChannel extends DefaultAttributeMap implements Cha
}
// See: https://github.com/netty/netty/issues/576
if (!PlatformDependent.isWindows() && !PlatformDependent.isRoot() &&
Boolean.TRUE.equals(config().getOption(ChannelOption.SO_BROADCAST)) &&
if (Boolean.TRUE.equals(config().getOption(ChannelOption.SO_BROADCAST)) &&
localAddress instanceof InetSocketAddress &&
!((InetSocketAddress) localAddress).getAddress().isAnyLocalAddress()) {
!((InetSocketAddress) localAddress).getAddress().isAnyLocalAddress() &&
!PlatformDependent.isWindows() && !PlatformDependent.isRoot()) {
// Warn a user about the fact that a non-root user can't receive a
// broadcast packet on *nix if the socket is bound on non-wildcard address.
logger.warn(

4
transport/src/main/java/io/netty/channel/socket/DefaultDatagramChannelConfig.java
View File

@ -157,8 +157,8 @@ public class DefaultDatagramChannelConfig extends DefaultChannelConfig implement
try {
// See: https://github.com/netty/netty/issues/576
if (broadcast &&
!PlatformDependent.isWindows() && !PlatformDependent.isRoot() &&
!javaSocket.getLocalAddress().isAnyLocalAddress()) {
!javaSocket.getLocalAddress().isAnyLocalAddress() &&
!PlatformDependent.isWindows() && !PlatformDependent.isRoot()) {
// Warn a user about the fact that a non-root user can't receive a
// broadcast packet on *nix if the socket is bound on non-wildcard address.
logger.warn(