| /* |
| * Copyright (c) 2000, 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 <windows.h> |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "jlong.h" |
| #include "sun_nio_ch_FileDispatcherImpl.h" |
| #include <io.h> |
| #include "nio.h" |
| #include "nio_util.h" |
| |
| |
| /************************************************************** |
| * FileDispatcherImpl.c |
| */ |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_read0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len) |
| { |
| DWORD read = 0; |
| BOOL result = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| if (h == INVALID_HANDLE_VALUE) { |
| JNU_ThrowIOExceptionWithLastError(env, "Invalid handle"); |
| return IOS_THROWN; |
| } |
| result = ReadFile(h, /* File handle to read */ |
| (LPVOID)address, /* address to put data */ |
| len, /* number of bytes to read */ |
| &read, /* number of bytes read */ |
| NULL); /* no overlapped struct */ |
| if (result == 0) { |
| int error = GetLastError(); |
| if (error == ERROR_BROKEN_PIPE) { |
| return IOS_EOF; |
| } |
| if (error == ERROR_NO_DATA) { |
| return IOS_UNAVAILABLE; |
| } |
| JNU_ThrowIOExceptionWithLastError(env, "Read failed"); |
| return IOS_THROWN; |
| } |
| return convertReturnVal(env, (jint)read, JNI_TRUE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_readv0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len) |
| { |
| DWORD read = 0; |
| BOOL result = 0; |
| jlong totalRead = 0; |
| LPVOID loc; |
| int i = 0; |
| DWORD num = 0; |
| struct iovec *iovecp = (struct iovec *)jlong_to_ptr(address); |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| if (h == INVALID_HANDLE_VALUE) { |
| JNU_ThrowIOExceptionWithLastError(env, "Invalid handle"); |
| return IOS_THROWN; |
| } |
| |
| for(i=0; i<len; i++) { |
| loc = (LPVOID)jlong_to_ptr(iovecp[i].iov_base); |
| num = iovecp[i].iov_len; |
| result = ReadFile(h, /* File handle to read */ |
| loc, /* address to put data */ |
| num, /* number of bytes to read */ |
| &read, /* number of bytes read */ |
| NULL); /* no overlapped struct */ |
| if (read > 0) { |
| totalRead += read; |
| } |
| if (read < num) { |
| break; |
| } |
| } |
| |
| if (result == 0) { |
| int error = GetLastError(); |
| if (error == ERROR_BROKEN_PIPE) { |
| return IOS_EOF; |
| } |
| if (error == ERROR_NO_DATA) { |
| return IOS_UNAVAILABLE; |
| } |
| JNU_ThrowIOExceptionWithLastError(env, "Read failed"); |
| return IOS_THROWN; |
| } |
| |
| return convertLongReturnVal(env, totalRead, JNI_TRUE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_pread0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len, jlong offset) |
| { |
| DWORD read = 0; |
| BOOL result = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| DWORD lowPos = 0; |
| long highPos = 0; |
| DWORD lowOffset = 0; |
| long highOffset = 0; |
| |
| if (h == INVALID_HANDLE_VALUE) { |
| JNU_ThrowIOExceptionWithLastError(env, "Invalid handle"); |
| return IOS_THROWN; |
| } |
| |
| lowPos = SetFilePointer(h, 0, &highPos, FILE_CURRENT); |
| if (lowPos == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| |
| lowOffset = (DWORD)offset; |
| highOffset = (DWORD)(offset >> 32); |
| lowOffset = SetFilePointer(h, lowOffset, &highOffset, FILE_BEGIN); |
| if (lowOffset == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| |
| result = ReadFile(h, /* File handle to read */ |
| (LPVOID)address, /* address to put data */ |
| len, /* number of bytes to read */ |
| &read, /* number of bytes read */ |
| NULL); /* struct with offset */ |
| |
| if (result == 0) { |
| int error = GetLastError(); |
| if (error == ERROR_BROKEN_PIPE) { |
| return IOS_EOF; |
| } |
| if (error == ERROR_NO_DATA) { |
| return IOS_UNAVAILABLE; |
| } |
| JNU_ThrowIOExceptionWithLastError(env, "Read failed"); |
| return IOS_THROWN; |
| } |
| |
| lowPos = SetFilePointer(h, lowPos, &highPos, FILE_BEGIN); |
| if (lowPos == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| return convertReturnVal(env, (jint)read, JNI_TRUE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_write0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len) |
| { |
| BOOL result = 0; |
| DWORD written = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| if (h != INVALID_HANDLE_VALUE) { |
| result = WriteFile(h, /* File handle to write */ |
| (LPCVOID)address, /* pointers to the buffers */ |
| len, /* number of bytes to write */ |
| &written, /* receives number of bytes written */ |
| NULL); /* no overlapped struct */ |
| } |
| |
| if ((h == INVALID_HANDLE_VALUE) || (result == 0)) { |
| JNU_ThrowIOExceptionWithLastError(env, "Write failed"); |
| } |
| |
| return convertReturnVal(env, (jint)written, JNI_FALSE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_writev0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len) |
| { |
| BOOL result = 0; |
| DWORD written = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| jlong totalWritten = 0; |
| |
| if (h != INVALID_HANDLE_VALUE) { |
| LPVOID loc; |
| int i = 0; |
| DWORD num = 0; |
| struct iovec *iovecp = (struct iovec *)jlong_to_ptr(address); |
| |
| for(i=0; i<len; i++) { |
| loc = (LPVOID)jlong_to_ptr(iovecp[i].iov_base); |
| num = iovecp[i].iov_len; |
| result = WriteFile(h, /* File handle to write */ |
| loc, /* pointers to the buffers */ |
| num, /* number of bytes to write */ |
| &written,/* receives number of bytes written */ |
| NULL); /* no overlapped struct */ |
| if (written > 0) { |
| totalWritten += written; |
| } |
| if (written < num) { |
| break; |
| } |
| } |
| } |
| |
| if ((h == INVALID_HANDLE_VALUE) || (result == 0)) { |
| JNU_ThrowIOExceptionWithLastError(env, "Write failed"); |
| } |
| |
| return convertLongReturnVal(env, totalWritten, JNI_FALSE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_pwrite0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len, jlong offset) |
| { |
| BOOL result = 0; |
| DWORD written = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| DWORD lowPos = 0; |
| long highPos = 0; |
| DWORD lowOffset = 0; |
| long highOffset = 0; |
| |
| lowPos = SetFilePointer(h, 0, &highPos, FILE_CURRENT); |
| if (lowPos == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| |
| lowOffset = (DWORD)offset; |
| highOffset = (DWORD)(offset >> 32); |
| lowOffset = SetFilePointer(h, lowOffset, &highOffset, FILE_BEGIN); |
| if (lowOffset == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| |
| result = WriteFile(h, /* File handle to write */ |
| (LPCVOID)address, /* pointers to the buffers */ |
| len, /* number of bytes to write */ |
| &written, /* receives number of bytes written */ |
| NULL); /* no overlapped struct */ |
| |
| if ((h == INVALID_HANDLE_VALUE) || (result == 0)) { |
| JNU_ThrowIOExceptionWithLastError(env, "Write failed"); |
| return IOS_THROWN; |
| } |
| |
| lowPos = SetFilePointer(h, lowPos, &highPos, FILE_BEGIN); |
| if (lowPos == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| return IOS_THROWN; |
| } |
| } |
| |
| return convertReturnVal(env, (jint)written, JNI_FALSE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_force0(JNIEnv *env, jobject this, |
| jobject fdo, jboolean md) |
| { |
| int result = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| if (h != INVALID_HANDLE_VALUE) { |
| result = FlushFileBuffers(h); |
| if (result == 0) { |
| int error = GetLastError(); |
| if (error != ERROR_ACCESS_DENIED) { |
| JNU_ThrowIOExceptionWithLastError(env, "Force failed"); |
| return IOS_THROWN; |
| } |
| } |
| } else { |
| JNU_ThrowIOExceptionWithLastError(env, "Force failed"); |
| return IOS_THROWN; |
| } |
| return 0; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_truncate0(JNIEnv *env, jobject this, |
| jobject fdo, jlong size) |
| { |
| DWORD lowPos = 0; |
| long highPos = 0; |
| BOOL result = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| lowPos = (DWORD)size; |
| highPos = (long)(size >> 32); |
| lowPos = SetFilePointer(h, lowPos, &highPos, FILE_BEGIN); |
| if (lowPos == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Truncation failed"); |
| return IOS_THROWN; |
| } |
| } |
| result = SetEndOfFile(h); |
| if (result == 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "Truncation failed"); |
| return IOS_THROWN; |
| } |
| return 0; |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_size0(JNIEnv *env, jobject this, jobject fdo) |
| { |
| DWORD sizeLow = 0; |
| DWORD sizeHigh = 0; |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| |
| sizeLow = GetFileSize(h, &sizeHigh); |
| if (sizeLow == ((DWORD)-1)) { |
| if (GetLastError() != ERROR_SUCCESS) { |
| JNU_ThrowIOExceptionWithLastError(env, "Size failed"); |
| return IOS_THROWN; |
| } |
| } |
| return (((jlong)sizeHigh) << 32) | sizeLow; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_lock0(JNIEnv *env, jobject this, jobject fdo, |
| jboolean block, jlong pos, jlong size, |
| jboolean shared) |
| { |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| DWORD lowPos = (DWORD)pos; |
| long highPos = (long)(pos >> 32); |
| DWORD lowNumBytes = (DWORD)size; |
| DWORD highNumBytes = (DWORD)(size >> 32); |
| BOOL result; |
| DWORD flags = 0; |
| OVERLAPPED o; |
| o.hEvent = 0; |
| o.Offset = lowPos; |
| o.OffsetHigh = highPos; |
| if (block == JNI_FALSE) { |
| flags |= LOCKFILE_FAIL_IMMEDIATELY; |
| } |
| if (shared == JNI_FALSE) { |
| flags |= LOCKFILE_EXCLUSIVE_LOCK; |
| } |
| result = LockFileEx(h, flags, 0, lowNumBytes, highNumBytes, &o); |
| if (result == 0) { |
| int error = GetLastError(); |
| if (error != ERROR_LOCK_VIOLATION) { |
| JNU_ThrowIOExceptionWithLastError(env, "Lock failed"); |
| return sun_nio_ch_FileDispatcherImpl_NO_LOCK; |
| } |
| if (flags & LOCKFILE_FAIL_IMMEDIATELY) { |
| return sun_nio_ch_FileDispatcherImpl_NO_LOCK; |
| } |
| JNU_ThrowIOExceptionWithLastError(env, "Lock failed"); |
| return sun_nio_ch_FileDispatcherImpl_NO_LOCK; |
| } |
| return sun_nio_ch_FileDispatcherImpl_LOCKED; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_release0(JNIEnv *env, jobject this, |
| jobject fdo, jlong pos, jlong size) |
| { |
| HANDLE h = (HANDLE)(handleval(env, fdo)); |
| DWORD lowPos = (DWORD)pos; |
| long highPos = (long)(pos >> 32); |
| DWORD lowNumBytes = (DWORD)size; |
| DWORD highNumBytes = (DWORD)(size >> 32); |
| jint result = 0; |
| OVERLAPPED o; |
| o.hEvent = 0; |
| o.Offset = lowPos; |
| o.OffsetHigh = highPos; |
| result = UnlockFileEx(h, 0, lowNumBytes, highNumBytes, &o); |
| if (result == 0 && GetLastError() != ERROR_NOT_LOCKED) { |
| JNU_ThrowIOExceptionWithLastError(env, "Release failed"); |
| } |
| } |
| |
| static void closeFile(JNIEnv *env, jlong fd) { |
| HANDLE h = (HANDLE)fd; |
| if (h != INVALID_HANDLE_VALUE) { |
| int result = CloseHandle(h); |
| if (result < 0) |
| JNU_ThrowIOExceptionWithLastError(env, "Close failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_close0(JNIEnv *env, jclass clazz, jobject fdo) |
| { |
| jlong fd = handleval(env, fdo); |
| closeFile(env, fd); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_closeByHandle(JNIEnv *env, jclass clazz, |
| jlong fd) |
| { |
| closeFile(env, fd); |
| } |
