8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/unix/native/libnio/ch/FileChannelImpl.c

@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2000, 2017, 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.
+ */
+
+#include "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jvm_md.h"
+#include "jlong.h"
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "sun_nio_ch_FileChannelImpl.h"
+#include "java_lang_Integer.h"
+#include "nio.h"
+#include "nio_util.h"
+#include <dlfcn.h>
+
+#if defined(__linux__) || defined(__solaris__)
+#include <sys/sendfile.h>
+#elif defined(_AIX)
+#include <sys/socket.h>
+#elif defined(_ALLBSD_SOURCE)
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+
+#define lseek64 lseek
+#define mmap64 mmap
+#endif
+
+static jfieldID chan_fd;        /* jobject 'fd' in sun.io.FileChannelImpl */
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_FileChannelImpl_initIDs(JNIEnv *env, jclass clazz)
+{
+    jlong pageSize = sysconf(_SC_PAGESIZE);
+    chan_fd = (*env)->GetFieldID(env, clazz, "fd", "Ljava/io/FileDescriptor;");
+    return pageSize;
+}
+
+static jlong
+handle(JNIEnv *env, jlong rv, char *msg)
+{
+    if (rv >= 0)
+        return rv;
+    if (errno == EINTR)
+        return IOS_INTERRUPTED;
+    JNU_ThrowIOExceptionWithLastError(env, msg);
+    return IOS_THROWN;
+}
+
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_FileChannelImpl_map0(JNIEnv *env, jobject this,
+                                     jint prot, jlong off, jlong len)
+{
+    void *mapAddress = 0;
+    jobject fdo = (*env)->GetObjectField(env, this, chan_fd);
+    jint fd = fdval(env, fdo);
+    int protections = 0;
+    int flags = 0;
+
+    if (prot == sun_nio_ch_FileChannelImpl_MAP_RO) {
+        protections = PROT_READ;
+        flags = MAP_SHARED;
+    } else if (prot == sun_nio_ch_FileChannelImpl_MAP_RW) {
+        protections = PROT_WRITE | PROT_READ;
+        flags = MAP_SHARED;
+    } else if (prot == sun_nio_ch_FileChannelImpl_MAP_PV) {
+        protections =  PROT_WRITE | PROT_READ;
+        flags = MAP_PRIVATE;
+    }
+
+    mapAddress = mmap64(
+        0,                    /* Let OS decide location */
+        len,                  /* Number of bytes to map */
+        protections,          /* File permissions */
+        flags,                /* Changes are shared */
+        fd,                   /* File descriptor of mapped file */
+        off);                 /* Offset into file */
+
+    if (mapAddress == MAP_FAILED) {
+        if (errno == ENOMEM) {
+            JNU_ThrowOutOfMemoryError(env, "Map failed");
+            return IOS_THROWN;
+        }
+        return handle(env, -1, "Map failed");
+    }
+
+    return ((jlong) (unsigned long) mapAddress);
+}
+
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_ch_FileChannelImpl_unmap0(JNIEnv *env, jobject this,
+                                       jlong address, jlong len)
+{
+    void *a = (void *)jlong_to_ptr(address);
+    return handle(env,
+                  munmap(a, (size_t)len),
+                  "Unmap failed");
+}
+
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_FileChannelImpl_position0(JNIEnv *env, jobject this,
+                                          jobject fdo, jlong offset)
+{
+    jint fd = fdval(env, fdo);
+    jlong result = 0;
+
+    if (offset < 0) {
+        result = lseek64(fd, 0, SEEK_CUR);
+    } else {
+        result = lseek64(fd, offset, SEEK_SET);
+    }
+    return handle(env, result, "Position failed");
+}
+
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_FileChannelImpl_transferTo0(JNIEnv *env, jobject this,
+                                            jobject srcFDO,
+                                            jlong position, jlong count,
+                                            jobject dstFDO)
+{
+    jint srcFD = fdval(env, srcFDO);
+    jint dstFD = fdval(env, dstFDO);
+
+#if defined(__linux__)
+    off64_t offset = (off64_t)position;
+    jlong n = sendfile64(dstFD, srcFD, &offset, (size_t)count);
+    if (n < 0) {
+        if (errno == EAGAIN)
+            return IOS_UNAVAILABLE;
+        if ((errno == EINVAL) && ((ssize_t)count >= 0))
+            return IOS_UNSUPPORTED_CASE;
+        if (errno == EINTR) {
+            return IOS_INTERRUPTED;
+        }
+        JNU_ThrowIOExceptionWithLastError(env, "Transfer failed");
+        return IOS_THROWN;
+    }
+    return n;
+#elif defined (__solaris__)
+    sendfilevec64_t sfv;
+    size_t numBytes = 0;
+    jlong result;
+
+    sfv.sfv_fd = srcFD;
+    sfv.sfv_flag = 0;
+    sfv.sfv_off = (off64_t)position;
+    sfv.sfv_len = count;
+
+    result = sendfilev64(dstFD, &sfv, 1, &numBytes);
+
+    /* Solaris sendfilev() will return -1 even if some bytes have been
+     * transferred, so we check numBytes first.
+     */
+    if (numBytes > 0)
+        return numBytes;
+    if (result < 0) {
+        if (errno == EAGAIN)
+            return IOS_UNAVAILABLE;
+        if (errno == EOPNOTSUPP)
+            return IOS_UNSUPPORTED_CASE;
+        if ((errno == EINVAL) && ((ssize_t)count >= 0))
+            return IOS_UNSUPPORTED_CASE;
+        if (errno == EINTR)
+            return IOS_INTERRUPTED;
+        JNU_ThrowIOExceptionWithLastError(env, "Transfer failed");
+        return IOS_THROWN;
+    }
+    return result;
+#elif defined(__APPLE__)
+    off_t numBytes;
+    int result;
+
+    numBytes = count;
+
+    result = sendfile(srcFD, dstFD, position, &numBytes, NULL, 0);
+
+    if (numBytes > 0)
+        return numBytes;
+
+    if (result == -1) {
+        if (errno == EAGAIN)
+            return IOS_UNAVAILABLE;
+        if (errno == EOPNOTSUPP || errno == ENOTSOCK || errno == ENOTCONN)
+            return IOS_UNSUPPORTED_CASE;
+        if ((errno == EINVAL) && ((ssize_t)count >= 0))
+            return IOS_UNSUPPORTED_CASE;
+        if (errno == EINTR)
+            return IOS_INTERRUPTED;
+        JNU_ThrowIOExceptionWithLastError(env, "Transfer failed");
+        return IOS_THROWN;
+    }
+
+    return result;
+
+#elif defined(_AIX)
+    jlong max = (jlong)java_lang_Integer_MAX_VALUE;
+    struct sf_parms sf_iobuf;
+    jlong result;
+
+    if (position > max)
+        return IOS_UNSUPPORTED_CASE;
+
+    if (count > max)
+        count = max;
+
+    memset(&sf_iobuf, 0, sizeof(sf_iobuf));
+    sf_iobuf.file_descriptor = srcFD;
+    sf_iobuf.file_offset = (off_t)position;
+    sf_iobuf.file_bytes = count;
+
+    result = send_file(&dstFD, &sf_iobuf, SF_SYNC_CACHE);
+
+    /* AIX send_file() will return 0 when this operation complete successfully,
+     * return 1 when partial bytes transfered and return -1 when an error has
+     * Occured.
+     */
+    if (result == -1) {
+        if (errno == EWOULDBLOCK)
+            return IOS_UNAVAILABLE;
+        if ((errno == EINVAL) && ((ssize_t)count >= 0))
+            return IOS_UNSUPPORTED_CASE;
+        if (errno == EINTR)
+            return IOS_INTERRUPTED;
+        if (errno == ENOTSOCK)
+            return IOS_UNSUPPORTED;
+        JNU_ThrowIOExceptionWithLastError(env, "Transfer failed");
+        return IOS_THROWN;
+    }
+
+    if (sf_iobuf.bytes_sent > 0)
+        return (jlong)sf_iobuf.bytes_sent;
+
+    return IOS_UNSUPPORTED_CASE;
+#else
+    return IOS_UNSUPPORTED_CASE;
+#endif
+}
+