gethostbyname may return any combination of IPv4 and IPv6 addresses,
and it's not safe to assume the first address is IPv4, which is all
our code is currently prepared to handle. In contrast, getaddrinfo
allows us to specify whether we want IPv4, IPv6, or both.
We should eventually make this switch on Windows as well, but the
status of getaddrinfo in Windows 2000 is not clear, and MinGW's
ws2tcpip.h only declares it for XP and above.
This commit also adds InetAddress.getByName for explicit DNS lookups.
In java-nio.cpp, we can't use GetPrimitiveArrayCritical when reading
from or writing to blocking sockets since it may block the rest of the
VM indefinitely.
In SelectableChannel.java, we can't use a null test on
SelectableChannel.key to determine whether the channel is open since
it might never be registered with a Selector. According to the Sun
documentation, a SelectableChannel is open as soon as it's created, so
that's what we now implement.
The latter is cheaper (avoids a state transition and possible memory
allocation) when we just want to know if an exception is thrown
without needing a handle to that exception.
On POSIX systems, Avian sends a special signal to a thread to
implement Thread.getStackTrace() when called from a different thread.
If the target thread is blocked on a call to accept when this happens,
it will return -1, with errno set to EINTR. Instead of treating this
as an error, we now just loop and call accept again.
Here is a patch for getting Avian to build in Windows. I used MinGW
and MSYS for the build environment. The patch has the following
changes:
1. java-nio.cpp: Had to add an include and remove a function
declaration that was reported as duplicate.
2. readme.txt: Updated the instructions to include notes about
building on Windows.
3. makefile: Added a conditional for MinGW. I left the existing "ifeq
($(platform),windows)" conditional alone so as to not break
cross-compiled Windows builds. There are some similarities between the
two, so it might be possible to combine portions of them in an elegant
manner. Since I'm not sure how the cross-compiled builds have been
done, I didn't want to mess with that portion of the makefile.
and server socket channels are implemented. This version works but only when
libnative is linked with g++ (because of C++ object creation code that fails
without this linking)
