| /* |
| * 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); |
| } |
| } |