Clemens Eisserer wrote:
:
PS: The striding+GetPrimitive... is even used by NIO for copying
java-arrays into direct-ByteBuffers:
while (length > 0) {
size = (length > MBYTE ? MBYTE : length);
GETCRITICAL(bytes, env, dst);
memcpy(bytes + dstPos, (void *)srcAddr, size);
RELEASECRITICAL(bytes, env, dst, 0);
................
Yes, NIO uses JNI critical sections when copying to/from arrays, but as
a FYI, we hope to eliminate this native code soon. The replacement uses
the Unsafe interface to do the copying and will be much faster than the
current native implementation. To allow for safepoint polling (in the
VM) it also copies very large arrays/buffers in strides.
-Alan.
