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123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/*
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* Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <windows.h>
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#include "jni.h"
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#include "jni_util.h"
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#include "jlong.h"
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#include "nio.h"
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#include "nio_util.h"
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#include "sun_nio_ch_WindowsAsynchronousFileChannelImpl.h"
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JNIEXPORT jint JNICALL
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Java_sun_nio_ch_WindowsAsynchronousFileChannelImpl_readFile(JNIEnv* env, jclass this,
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jlong handle, jlong address, jint len, jlong offset, jlong ov)
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{
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BOOL res;
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OVERLAPPED* lpOverlapped = (OVERLAPPED*)jlong_to_ptr(ov);
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lpOverlapped->Offset = (DWORD)offset;
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lpOverlapped->OffsetHigh = (DWORD)((long)(offset >> 32));
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lpOverlapped->hEvent = NULL;
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res = ReadFile((HANDLE) jlong_to_ptr(handle),
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(LPVOID) jlong_to_ptr(address),
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(DWORD)len,
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NULL,
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lpOverlapped);
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if (res == 0) {
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int error = GetLastError();
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if (error == ERROR_IO_PENDING)
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return IOS_UNAVAILABLE;
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if (error == ERROR_HANDLE_EOF)
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return IOS_EOF;
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JNU_ThrowIOExceptionWithLastError(env, "ReadFile failed");
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return IOS_THROWN;
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}
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return IOS_UNAVAILABLE;
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}
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JNIEXPORT jint JNICALL
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Java_sun_nio_ch_WindowsAsynchronousFileChannelImpl_writeFile(JNIEnv* env, jclass this,
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jlong handle, jlong address, jint len, jlong offset, jlong ov)
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{
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BOOL res;
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OVERLAPPED* lpOverlapped = (OVERLAPPED*)jlong_to_ptr(ov);
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lpOverlapped->Offset = (DWORD)offset;
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lpOverlapped->OffsetHigh = (DWORD)((long)(offset >> 32));
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lpOverlapped->hEvent = NULL;
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res = WriteFile((HANDLE)jlong_to_ptr(handle),
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(LPVOID) jlong_to_ptr(address),
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(DWORD)len,
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NULL,
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lpOverlapped);
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if (res == 0) {
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int error = GetLastError();
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if (error == ERROR_IO_PENDING)
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return IOS_UNAVAILABLE;
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JNU_ThrowIOExceptionWithLastError(env, "WriteFile failed");
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return IOS_THROWN;
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}
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return IOS_UNAVAILABLE;
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}
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JNIEXPORT jint JNICALL
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Java_sun_nio_ch_WindowsAsynchronousFileChannelImpl_lockFile(JNIEnv *env, jobject this, jlong handle,
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jlong pos, jlong size, jboolean shared, jlong ov)
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{
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BOOL res;
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HANDLE h = jlong_to_ptr(handle);
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DWORD lowPos = (DWORD)pos;
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long highPos = (long)(pos >> 32);
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DWORD lowNumBytes = (DWORD)size;
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DWORD highNumBytes = (DWORD)(size >> 32);
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DWORD flags = (shared == JNI_TRUE) ? 0 : LOCKFILE_EXCLUSIVE_LOCK;
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OVERLAPPED* lpOverlapped = (OVERLAPPED*)jlong_to_ptr(ov);
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lpOverlapped->Offset = lowPos;
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lpOverlapped->OffsetHigh = highPos;
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lpOverlapped->hEvent = NULL;
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res = LockFileEx(h, flags, 0, lowNumBytes, highNumBytes, lpOverlapped);
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if (res == 0) {
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int error = GetLastError();
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if (error == ERROR_IO_PENDING) {
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return IOS_UNAVAILABLE;
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}
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JNU_ThrowIOExceptionWithLastError(env, "LockFile failed");
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return IOS_THROWN;
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}
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return 0;
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}
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