author | ohair |
Tue, 25 May 2010 15:58:33 -0700 | |
changeset 5506 | 202f599c92aa |
parent 2057 | 3acf8e5e2ca0 |
child 11908 | 384d1c31d539 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2009, 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 "jni.h" |
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#include "jni_util.h" |
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#include "jvm.h" |
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#include "jlong.h" |
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#include "sun_nio_ch_FileDispatcherImpl.h" |
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#include "java_lang_Long.h" |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <fcntl.h> |
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#include <sys/uio.h> |
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#include "nio.h" |
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#include "nio_util.h" |
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static int preCloseFD = -1; /* File descriptor to which we dup other fd's |
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before closing them for real */ |
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JNIEXPORT void JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_init(JNIEnv *env, jclass cl) |
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{ |
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int sp[2]; |
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if (socketpair(PF_UNIX, SOCK_STREAM, 0, sp) < 0) { |
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JNU_ThrowIOExceptionWithLastError(env, "socketpair failed"); |
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return; |
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} |
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preCloseFD = sp[0]; |
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close(sp[1]); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_read0(JNIEnv *env, jclass clazz, |
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jobject fdo, jlong address, jint len) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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return convertReturnVal(env, read(fd, buf, len), JNI_TRUE); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_pread0(JNIEnv *env, jclass clazz, jobject fdo, |
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jlong address, jint len, jlong offset) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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return convertReturnVal(env, pread64(fd, buf, len, offset), JNI_TRUE); |
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} |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_readv0(JNIEnv *env, jclass clazz, |
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jobject fdo, jlong address, jint len) |
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{ |
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jint fd = fdval(env, fdo); |
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struct iovec *iov = (struct iovec *)jlong_to_ptr(address); |
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if (len > 16) { |
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len = 16; |
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} |
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return convertLongReturnVal(env, readv(fd, iov, len), JNI_TRUE); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_write0(JNIEnv *env, jclass clazz, |
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jobject fdo, jlong address, jint len) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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return convertReturnVal(env, write(fd, buf, len), JNI_FALSE); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_pwrite0(JNIEnv *env, jclass clazz, jobject fdo, |
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jlong address, jint len, jlong offset) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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return convertReturnVal(env, pwrite64(fd, buf, len, offset), JNI_FALSE); |
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} |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_writev0(JNIEnv *env, jclass clazz, |
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jobject fdo, jlong address, jint len) |
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{ |
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jint fd = fdval(env, fdo); |
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struct iovec *iov = (struct iovec *)jlong_to_ptr(address); |
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if (len > 16) { |
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len = 16; |
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} |
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return convertLongReturnVal(env, writev(fd, iov, len), JNI_FALSE); |
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} |
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static jlong |
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handle(JNIEnv *env, jlong rv, char *msg) |
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{ |
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if (rv >= 0) |
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return rv; |
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if (errno == EINTR) |
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return IOS_INTERRUPTED; |
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JNU_ThrowIOExceptionWithLastError(env, msg); |
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return IOS_THROWN; |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_force0(JNIEnv *env, jobject this, |
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jobject fdo, jboolean md) |
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{ |
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jint fd = fdval(env, fdo); |
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int result = 0; |
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if (md == JNI_FALSE) { |
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result = fdatasync(fd); |
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} else { |
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result = fsync(fd); |
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} |
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return handle(env, result, "Force failed"); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_truncate0(JNIEnv *env, jobject this, |
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jobject fdo, jlong size) |
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{ |
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return handle(env, |
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ftruncate64(fdval(env, fdo), size), |
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"Truncation failed"); |
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} |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_size0(JNIEnv *env, jobject this, jobject fdo) |
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{ |
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struct stat64 fbuf; |
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if (fstat64(fdval(env, fdo), &fbuf) < 0) |
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return handle(env, -1, "Size failed"); |
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return fbuf.st_size; |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_lock0(JNIEnv *env, jobject this, jobject fdo, |
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jboolean block, jlong pos, jlong size, |
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jboolean shared) |
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{ |
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jint fd = fdval(env, fdo); |
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jint lockResult = 0; |
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int cmd = 0; |
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struct flock64 fl; |
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fl.l_whence = SEEK_SET; |
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if (size == (jlong)java_lang_Long_MAX_VALUE) { |
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fl.l_len = (off64_t)0; |
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} else { |
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fl.l_len = (off64_t)size; |
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} |
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fl.l_start = (off64_t)pos; |
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if (shared == JNI_TRUE) { |
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fl.l_type = F_RDLCK; |
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} else { |
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fl.l_type = F_WRLCK; |
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} |
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if (block == JNI_TRUE) { |
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cmd = F_SETLKW64; |
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} else { |
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cmd = F_SETLK64; |
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} |
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lockResult = fcntl(fd, cmd, &fl); |
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if (lockResult < 0) { |
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if ((cmd == F_SETLK64) && (errno == EAGAIN)) |
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return sun_nio_ch_FileDispatcherImpl_NO_LOCK; |
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if (errno == EINTR) |
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return sun_nio_ch_FileDispatcherImpl_INTERRUPTED; |
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JNU_ThrowIOExceptionWithLastError(env, "Lock failed"); |
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} |
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return 0; |
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201 |
} |
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202 |
|
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203 |
JNIEXPORT void JNICALL |
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204 |
Java_sun_nio_ch_FileDispatcherImpl_release0(JNIEnv *env, jobject this, |
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205 |
jobject fdo, jlong pos, jlong size) |
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{ |
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jint fd = fdval(env, fdo); |
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jint lockResult = 0; |
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struct flock64 fl; |
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int cmd = F_SETLK64; |
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211 |
|
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fl.l_whence = SEEK_SET; |
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if (size == (jlong)java_lang_Long_MAX_VALUE) { |
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fl.l_len = (off64_t)0; |
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} else { |
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fl.l_len = (off64_t)size; |
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} |
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fl.l_start = (off64_t)pos; |
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fl.l_type = F_UNLCK; |
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lockResult = fcntl(fd, cmd, &fl); |
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if (lockResult < 0) { |
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JNU_ThrowIOExceptionWithLastError(env, "Release failed"); |
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} |
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} |
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225 |
|
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|
2 | 227 |
static void closeFileDescriptor(JNIEnv *env, int fd) { |
228 |
if (fd != -1) { |
|
229 |
int result = close(fd); |
|
230 |
if (result < 0) |
|
231 |
JNU_ThrowIOExceptionWithLastError(env, "Close failed"); |
|
232 |
} |
|
233 |
} |
|
234 |
||
235 |
JNIEXPORT void JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_close0(JNIEnv *env, jclass clazz, jobject fdo) |
2 | 237 |
{ |
238 |
jint fd = fdval(env, fdo); |
|
239 |
closeFileDescriptor(env, fd); |
|
240 |
} |
|
241 |
||
242 |
JNIEXPORT void JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_preClose0(JNIEnv *env, jclass clazz, jobject fdo) |
2 | 244 |
{ |
245 |
jint fd = fdval(env, fdo); |
|
246 |
if (preCloseFD >= 0) { |
|
247 |
if (dup2(preCloseFD, fd) < 0) |
|
248 |
JNU_ThrowIOExceptionWithLastError(env, "dup2 failed"); |
|
249 |
} |
|
250 |
} |
|
251 |
||
252 |
JNIEXPORT void JNICALL |
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Java_sun_nio_ch_FileDispatcherImpl_closeIntFD(JNIEnv *env, jclass clazz, jint fd) |
2 | 254 |
{ |
255 |
closeFileDescriptor(env, fd); |
|
256 |
} |