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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
* or visit www.oracle.com if you need additional information or have any
* questions.
* ------
*
* This file may contain additional modifications which are Copyright (c) Red Hat and other
* contributors.
*/
package java.io;
import static org.qbicc.runtime.CNative.*;
import static org.qbicc.runtime.posix.Errno.*;
import static org.qbicc.runtime.posix.Fcntl.*;
import static org.qbicc.runtime.posix.Unistd.*;
import static org.qbicc.runtime.stdc.Errno.errno;
import org.qbicc.rt.annotation.Tracking;
import org.qbicc.runtime.Build;
import org.qbicc.runtime.host.HostIO;
@Tracking("src/java.base/unix/native/libjava/FileDescriptor_md.c")
@Tracking("src/java.base/windows/native/libjava/FileDescriptor_md.c")
public class FileDescriptor$_native {
int fd;
boolean append;
private static long getHandle(int fd) {
if (Build.Target.isPosix()) {
return -1;
} else {
throw new UnsupportedOperationException();
}
}
private static boolean getAppend(int fd) {
if (Build.isHost()) {
return HostIO.isAppend(fd);
} else if (Build.Target.isPosix()) {
c_int res = fcntl(word(fd), F_GETFL);
return (res.intValue() & O_APPEND.intValue()) != 0;
} else {
return false;
}
}
private void close0() throws IOException {
int fd = this.fd;
if (fd == -1) {
return;
}
if (Build.isHost()) {
this.fd = -1;
if (0 <= fd && fd <= 2) {
// stdin, stdout, or stderr... redirect to `/dev/null` in the same manner as OpenJDK
HostIO.reopen(fd, "/dev/null", fd == 0 ? HostIO.O_RDONLY : HostIO.O_WRONLY);
} else {
HostIO.close(fd);
}
} else if (Build.Target.isPosix()) {
this.fd = -1;
if (0 <= fd && fd <= 2) {
// stdin, stdout, or stderr... redirect to `/dev/null` in the same manner as OpenJDK
c_int res = open(utf8z("/dev/null"), O_WRONLY);
if (res.isLt(zero())) {
throw new IOException("open /dev/null failed");
}
dup2(res, word(fd));
close(res);
}
c_int res;
if (Build.Target.isAix()) {
do {
res = close(word(fd));
} while (res.intValue() == -1 && errno == EINTR.intValue());
if (res.intValue() == -1) {
// todo: safe strerror...
throw new IOException("close failed");
}
} else {
res = close(word(fd));
if (res.intValue() == -1 && errno != EINTR.intValue()) {
// todo: safe strerror...
throw new IOException("close failed");
}
}
} else {
throw new UnsupportedOperationException();
}
}
private static void initIDs() {
// no operation
}
public void sync() throws SyncFailedException {
if (Build.isHost()) {
try {
HostIO.fsync(fd);
} catch (IOException e) {
throw new SyncFailedException(e.getMessage());
}
} else if (Build.Target.isPosix()) {
c_int res = fsync(word(fd));
if (res.intValue() == -1) {
throw new SyncFailedException("sync failed");
}
} else {
throw new UnsupportedOperationException();
}
}
}
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