Variant f_socket_select(VRefParam read, VRefParam write, VRefParam except,
CVarRef vtv_sec, int tv_usec /* = 0 */) {
int count = 0;
if (!read.isNull()) {
count += read.toArray().size();
}
if (!write.isNull()) {
count += write.toArray().size();
}
if (!except.isNull()) {
count += except.toArray().size();
}
if (!count) {
return false;
}
struct pollfd *fds = (struct pollfd *)calloc(count, sizeof(struct pollfd));
count = 0;
if (!read.isNull()) {
sock_array_to_fd_set(read.toArray(), fds, count, POLLIN);
}
if (!write.isNull()) {
sock_array_to_fd_set(write.toArray(), fds, count, POLLOUT);
}
if (!except.isNull()) {
sock_array_to_fd_set(except.toArray(), fds, count, POLLPRI);
}
IOStatusHelper io("socket_select");
int timeout_ms = -1;
if (!vtv_sec.isNull()) {
timeout_ms = vtv_sec.toInt32() * 1000 + tv_usec / 1000;
}
int retval = poll(fds, count, timeout_ms);
if (retval == -1) {
raise_warning("unable to select [%d]: %s", errno,
Util::safe_strerror(errno).c_str());
free(fds);
return false;
}
count = 0;
int nfds = 0;
if (!read.isNull()) {
sock_array_from_fd_set(read, fds, nfds, count, POLLIN|POLLERR);
}
if (!write.isNull()) {
sock_array_from_fd_set(write, fds, nfds, count, POLLOUT|POLLERR);
}
if (!except.isNull()) {
sock_array_from_fd_set(except, fds, nfds, count, POLLPRI|POLLERR);
}
free(fds);
return count;
}
Variant HHVM_FUNCTION(socket_select,
VRefParam read,
VRefParam write,
VRefParam except,
const Variant& vtv_sec,
int tv_usec /* = 0 */) {
int count = 0;
if (!read.isNull()) {
count += read.toArray().size();
}
if (!write.isNull()) {
count += write.toArray().size();
}
if (!except.isNull()) {
count += except.toArray().size();
}
if (!count) {
return false;
}
struct pollfd *fds = (struct pollfd *)calloc(count, sizeof(struct pollfd));
count = 0;
if (!read.isNull()) {
sock_array_to_fd_set(read.toArray(), fds, count, POLLIN);
}
if (!write.isNull()) {
sock_array_to_fd_set(write.toArray(), fds, count, POLLOUT);
}
if (!except.isNull()) {
sock_array_to_fd_set(except.toArray(), fds, count, POLLPRI);
}
if (!count) {
raise_warning("no resource arrays were passed to select");
free(fds);
return false;
}
IOStatusHelper io("socket_select");
int timeout_ms = -1;
if (!vtv_sec.isNull()) {
timeout_ms = vtv_sec.toInt32() * 1000 + tv_usec / 1000;
}
/* slight hack to support buffered data; if there is data sitting in the
* read buffer of any of the streams in the read array, let's pretend
* that we selected, but return only the readable sockets */
if (!read.isNull()) {
auto hasData = Array::Create();
for (ArrayIter iter(read.toArray()); iter; ++iter) {
auto file = cast<File>(iter.second());
if (file->bufferedLen() > 0) {
hasData.append(iter.second());
}
}
if (hasData.size() > 0) {
if (!write.isNull()) {
write = empty_array();
}
if (!except.isNull()) {
except = empty_array();
}
read = hasData;
free(fds);
return hasData.size();
}
}
int retval = poll(fds, count, timeout_ms);
if (retval == -1) {
raise_warning("unable to select [%d]: %s", errno,
folly::errnoStr(errno).c_str());
free(fds);
return false;
}
count = 0;
int nfds = 0;
if (!read.isNull()) {
sock_array_from_fd_set(read, fds, nfds, count, POLLIN|POLLERR|POLLHUP);
}
if (!write.isNull()) {
sock_array_from_fd_set(write, fds, nfds, count, POLLOUT|POLLERR);
}
if (!except.isNull()) {
sock_array_from_fd_set(except, fds, nfds, count, POLLPRI|POLLERR);
}
free(fds);
return count;
}