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8202261: (fc) FileChannel.map and RandomAccessFile.setLength should not preallocate space

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Reviewed-by: bpb
This commit is contained in:
Alan Bateman 2018-04-26 09:04:18 +01:00
parent ccc74fdd60
commit 2df7aa7b9f
9 changed files with 101 additions and 144 deletions
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27
src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2018, 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
@ -298,6 +298,31 @@ Java_sun_nio_ch_FileDispatcherImpl_pwrite0(JNIEnv *env, jclass clazz, jobject fd
return convertReturnVal(env, (jint)written, JNI_FALSE);
}
JNIEXPORT jlong JNICALL
Java_sun_nio_ch_FileDispatcherImpl_seek0(JNIEnv *env, jclass clazz,
jobject fdo, jlong offset)
{
BOOL result = 0;
HANDLE h = (HANDLE)(handleval(env, fdo));
LARGE_INTEGER where;
DWORD whence;
if (offset < 0) {
where.QuadPart = 0;
whence = FILE_CURRENT;
} else {
where.QuadPart = offset;
whence = FILE_BEGIN;
}
result = SetFilePointerEx(h, where, &where, whence);
if (result == 0) {
JNU_ThrowIOExceptionWithLastError(env, "SetFilePointerEx failed");
return IOS_THROWN;
}
return (jlong)where.QuadPart;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_FileDispatcherImpl_force0(JNIEnv *env, jobject this,
jobject fdo, jboolean md)