8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/unix/native/libnio/fs/UnixCopyFile.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2008, 2009, 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 "jlong.h"
+
+#include <unistd.h>
+#include <errno.h>
+
+#include "sun_nio_fs_UnixCopyFile.h"
+
+#define RESTARTABLE(_cmd, _result) do { \
+  do { \
+    _result = _cmd; \
+  } while((_result == -1) && (errno == EINTR)); \
+} while(0)
+
+static void throwUnixException(JNIEnv* env, int errnum) {
+    jobject x = JNU_NewObjectByName(env, "sun/nio/fs/UnixException",
+        "(I)V", errnum);
+    if (x != NULL) {
+        (*env)->Throw(env, x);
+    }
+}
+
+/**
+ * Transfer all bytes from src to dst via user-space buffers
+ */
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_UnixCopyFile_transfer
+    (JNIEnv* env, jclass this, jint dst, jint src, jlong cancelAddress)
+{
+    char buf[8192];
+    volatile jint* cancel = (jint*)jlong_to_ptr(cancelAddress);
+
+    for (;;) {
+        ssize_t n, pos, len;
+        RESTARTABLE(read((int)src, &buf, sizeof(buf)), n);
+        if (n <= 0) {
+            if (n < 0)
+                throwUnixException(env, errno);
+            return;
+        }
+        if (cancel != NULL && *cancel != 0) {
+            throwUnixException(env, ECANCELED);
+            return;
+        }
+        pos = 0;
+        len = n;
+        do {
+            char* bufp = buf;
+            bufp += pos;
+            RESTARTABLE(write((int)dst, bufp, len), n);
+            if (n == -1) {
+                throwUnixException(env, errno);
+                return;
+            }
+            pos += n;
+            len -= n;
+        } while (len > 0);
+    }
+}