static jboolean OSNetworkSystem_selectImpl(JNIEnv* env, jclass,
jobjectArray readFDArray, jobjectArray writeFDArray, jint countReadC,
jint countWriteC, jintArray outFlags, jlong timeoutMs) {
// Initialize the fd_sets.
int maxFd = -1;
fd_set readFds;
fd_set writeFds;
FD_ZERO(&readFds);
FD_ZERO(&writeFds);
bool initialized = initFdSet(env, readFDArray, countReadC, &readFds, &maxFd) &&
initFdSet(env, writeFDArray, countWriteC, &writeFds, &maxFd);
if (!initialized) {
return -1;
}
// Initialize the timeout, if any.
timeval tv;
timeval* tvp = NULL;
if (timeoutMs >= 0) {
tv = toTimeval(timeoutMs);
tvp = &tv;
}
// Perform the select.
int result = select(maxFd + 1, &readFds, &writeFds, NULL, tvp);
if (result == 0) {
// Timeout.
return JNI_FALSE;
} else if (result == -1) {
// Error.
if (errno == EINTR) {
return JNI_FALSE;
} else {
jniThrowSocketException(env, errno);
return JNI_FALSE;
}
}
// Translate the result into the int[] we're supposed to fill in.
ScopedIntArrayRW flagArray(env, outFlags);
if (flagArray.get() == NULL) {
return JNI_FALSE;
}
return translateFdSet(env, readFDArray, countReadC, readFds, flagArray.get(), 0, SOCKET_OP_READ) &&
translateFdSet(env, writeFDArray, countWriteC, writeFds, flagArray.get(), countReadC, SOCKET_OP_WRITE);
}
void SelectManager::loop()
{
int ret;
char buf[1];
for (; !m_isStop;)
{
initFdSet();
ret = select(m_maxFd + 1, &m_readSet, &m_writeSet, NULL, NULL);
if (ret == -1)
{
if (m_isStop)
{
INFOLOG("recv exit signal, exit loop");
}else
{
INFOLOG("EINTR");
}
ERRORLOG1("select err, %s", strerror(errno));
break;
}
if (0 == ret)
{
ERRORLOG("select return 0");
break;
}
if (FD_ISSET(m_recvNotifyFd, &m_readSet))
{
if (read(m_recvNotifyFd, buf, sizeof(buf)) == -1)
{
ERRORLOG1("write err, %s", strerror(errno));
}
if (0 == *buf)
{
INFOLOG("recv exit notify, exit loop");
}
if (ret == 1) continue;
}
handleFdSet();
}
m_isStop = 2;
}
