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The Qbicc builder for the java.base JDK module
/*
* This code is based on OpenJDK source file(s) which contain the following copyright notice:
*
* ------
* Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*
* This file may contain additional modifications which are Copyright (c) Red Hat and other
* contributors.
*/
package sun.nio.ch;
import static org.qbicc.runtime.CNative.*;
import static jdk.internal.sys.linux.EPoll.*;
import static jdk.internal.sys.posix.Errno.*;
import static org.qbicc.runtime.stdc.Errno.*;
import static org.qbicc.runtime.stdc.Stddef.*;
import static org.qbicc.runtime.stdc.Stdlib.*;
import java.io.IOException;
import org.qbicc.rt.annotation.Tracking;
@Tracking("src/java.base/linux/native/libnio/ch/Epoll.c")
class EPoll$_native {
private static int eventSize() {
return sizeof(struct_epoll_event.class).intValue();
}
private static int eventsOffset() {
struct_epoll_event ev = auto();
return offsetof(ev.events).intValue();
}
private static int dataOffset() {
struct_epoll_event ev = auto();
return offsetof(ev.data).intValue();
}
static int create() throws IOException {
int epfd = epoll_create1(EPOLL_CLOEXEC).intValue();
if (epfd < 0) {
throw new IOException("epoll_create1 failed");
}
return epfd;
}
static int ctl(int epfd, int opcode, int fd, int events) {
struct_epoll_event event = auto();
event.events = word(events);
event.data.fd = word(fd);
c_int res = epoll_ctl(word(epfd), word(opcode), word(fd), addr_of(event));
return (res.intValue() == 0) ? 0 : errno;
}
static int wait(int epfd, long pollAddress, int numfds, int timeout) throws IOException {
ptr events = word(pollAddress);
int res = epoll_wait(word(epfd), events, word(numfds), word(timeout)).intValue();
if (res < 0) {
if (errno == EINTR.intValue()) {
return IOStatus.INTERRUPTED;
} else {
throw new IOException("epoll_wait failed");
}
}
return res;
}
}
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