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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to You under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
#ifdef LINUX
#define DIRECT_FLAG O_DIRECT | O_NOATIME
#define LINUX
#elif __APPLE__
#define DIRECT_FLAG 0
#define OSX
#else
#define DIRECT_FLAG O_DIRECT // __unix__ is not used as even Linux falls under it.
#endif
#include
#include // posix_fadvise, constants for open
#include // strerror
#include // errno
#include // pread
#include // posix_madvise, madvise
#include // constants for open
#include // constants for open
// java -cp .:lib/junit-4.10.jar:./build/classes/test:./build/classes/java:./build/classes/demo -Dlucene.version=2.9-dev -DtempDir=build -ea org.junit.runner.JUnitCore org.apache.lucene.index.TestDoc
#ifdef LINUX
/*
* Class: org_apache_lucene_store_NativePosixUtil
* Method: posix_fadvise
* Signature: (Ljava/io/FileDescriptor;JJI)V
*/
extern "C"
JNIEXPORT jint JNICALL Java_org_apache_lucene_store_NativePosixUtil_posix_1fadvise(JNIEnv *env, jclass _ignore, jobject fileDescriptor, jlong offset, jlong len, jint advice)
{
jfieldID field_fd;
jmethodID const_fdesc;
jclass ioex = env->FindClass("java/io/IOException");
if (ioex == NULL) {
return -1;
}
jclass fdesc = env->FindClass("java/io/FileDescriptor");
if (fdesc == NULL) {
return -2;
}
// read the int fd field
jfieldID fdField = env->GetFieldID(fdesc, "fd", "I");
if (fdField == NULL) {
return -3;
}
int fd = env->GetIntField(fileDescriptor, fdField);
//printf("fd=%d\n", fd); fflush(stdout);
int osAdvice;
switch(advice) {
case 0:
osAdvice = POSIX_FADV_NORMAL;
break;
case 1:
osAdvice = POSIX_FADV_SEQUENTIAL;
break;
case 2:
osAdvice = POSIX_FADV_RANDOM;
break;
case 3:
osAdvice = POSIX_FADV_WILLNEED;
break;
case 4:
osAdvice = POSIX_FADV_DONTNEED;
break;
case 5:
osAdvice = POSIX_FADV_NOREUSE;
break;
}
int result = posix_fadvise(fd, (off_t) offset, (off_t) len, osAdvice);
if (result == 0) {
// ok
} else {
env->ThrowNew(ioex, strerror(errno));
return -1;
}
return 0;
}
#endif
/*
* Class: org_apache_lucene_store_NativePosixUtil
* Method: open_direct
* Signature: (Ljava/lang/String;Z)Ljava/io/FileDescriptor;
*/
extern "C"
JNIEXPORT jobject JNICALL Java_org_apache_lucene_store_NativePosixUtil_open_1direct(JNIEnv *env, jclass _ignore, jstring filename, jboolean readOnly)
{
jfieldID field_fd;
jmethodID const_fdesc;
jclass class_fdesc, class_ioex;
jobject ret;
int fd;
char *fname;
class_ioex = env->FindClass("java/io/IOException");
if (class_ioex == NULL) {
return NULL;
}
class_fdesc = env->FindClass("java/io/FileDescriptor");
if (class_fdesc == NULL) {
return NULL;
}
fname = (char *) env->GetStringUTFChars(filename, NULL);
if (readOnly) {
fd = open(fname, O_RDONLY | DIRECT_FLAG);
#ifdef OSX
fcntl(fd, F_NOCACHE, 1);
#endif
} else {
fd = open(fname, O_RDWR | O_CREAT | DIRECT_FLAG, 0666);
#ifdef OSX
fcntl(fd, F_NOCACHE, 1);
#endif
}
//printf("open %s -> %d; ro %d\n", fname, fd, readOnly); fflush(stdout);
env->ReleaseStringUTFChars(filename, fname);
if (fd < 0) {
// open returned an error. Throw an IOException with the error string
env->ThrowNew(class_ioex, strerror(errno));
return NULL;
}
// construct a new FileDescriptor
const_fdesc = env->GetMethodID(class_fdesc, "", "()V");
if (const_fdesc == NULL) {
return NULL;
}
ret = env->NewObject(class_fdesc, const_fdesc);
// poke the "fd" field with the file descriptor
field_fd = env->GetFieldID(class_fdesc, "fd", "I");
if (field_fd == NULL) {
return NULL;
}
env->SetIntField(ret, field_fd, fd);
// and return it
return ret;
}
/*
* Class: org_apache_lucene_store_NativePosixUtil
* Method: pread
* Signature: (Ljava/io/FileDescriptor;JLjava/nio/ByteBuffer;)I
*/
extern "C"
JNIEXPORT jlong JNICALL Java_org_apache_lucene_store_NativePosixUtil_pread(JNIEnv *env, jclass _ignore, jobject jfd, jlong pos, jobject byteBuf)
{
// get int fd:
jclass class_fdesc = env->FindClass("java/io/FileDescriptor");
if (class_fdesc == NULL) {
return -1;
}
jfieldID field_fd = env->GetFieldID(class_fdesc, "fd", "I");
if (field_fd == NULL) {
return -1;
}
const int fd = env->GetIntField(jfd, field_fd);
void *p = env->GetDirectBufferAddress(byteBuf);
if (p == NULL) {
return -1;
}
size_t size = (size_t) env->GetDirectBufferCapacity(byteBuf);
if (size <= 0) {
return -1;
}
size_t numBytesRead = pread(fd, p, (size_t) size, (off_t) pos);
if (numBytesRead == -1) {
jclass class_ioex = env->FindClass("java/io/IOException");
if (class_ioex == NULL) {
return -1;
}
env->ThrowNew(class_ioex, strerror(errno));
return -1;
}
return (jlong) numBytesRead;
}
/*
* Class: org_apache_lucene_store_NativePosixUtil
* Method: posix_madvise
* Signature: (Ljava/nio/ByteBuffer;I)I
*/
extern "C"
JNIEXPORT jint JNICALL Java_org_apache_lucene_store_NativePosixUtil_posix_1madvise(JNIEnv *env, jclass _ignore, jobject buffer, jint advice) {
void *p = env->GetDirectBufferAddress(buffer);
if (p == NULL) {
return -1;
}
size_t size = (size_t) env->GetDirectBufferCapacity(buffer);
if (size <= 0) {
return -1;
}
int page = getpagesize();
// round start down to start of page
long long start = (long long) p;
start = start & (~(page-1));
// round end up to start of page
long long end = start + size;
end = (end + page-1)&(~(page-1));
size = (end-start);
int osAdvice;
switch(advice) {
case 0:
osAdvice = POSIX_MADV_NORMAL;
break;
case 1:
osAdvice = POSIX_MADV_SEQUENTIAL;
break;
case 2:
osAdvice = POSIX_MADV_RANDOM;
break;
case 3:
osAdvice = POSIX_MADV_WILLNEED;
break;
case 4:
osAdvice = POSIX_MADV_DONTNEED;
break;
case 5:
return -1;
break;
}
//printf("DO posix_madvise: %lx %d\n", p, size);fflush(stdout);
if (posix_madvise((void *) start, size, osAdvice) != 0) {
jclass class_ioex = env->FindClass("java/io/IOException");
if (class_ioex == NULL) {
return -1;
}
env->ThrowNew(class_ioex, strerror(errno));
return -1;
}
return 0;
}
/*
* Class: org_apache_lucene_store_NativePosixUtil
* Method: madvise
* Signature: (Ljava/nio/ByteBuffer;I)I
*/
extern "C"
JNIEXPORT jint JNICALL Java_org_apache_lucene_store_NativePosixUtil_madvise(JNIEnv *env, jclass _ignore, jobject buffer, jint advice) {
void *p = env->GetDirectBufferAddress(buffer);
if (p == NULL) {
return -1;
}
size_t size = (size_t) env->GetDirectBufferCapacity(buffer);
if (size <= 0) {
return -1;
}
int page = getpagesize();
// round start down to start of page
long long start = (long long) p;
start = start & (~(page-1));
// round end up to start of page
long long end = start + size;
end = (end + page-1)&(~(page-1));
size = (end-start);
int osAdvice;
switch(advice) {
case 0:
osAdvice = MADV_NORMAL;
break;
case 1:
osAdvice = MADV_SEQUENTIAL;
break;
case 2:
osAdvice = MADV_RANDOM;
break;
case 3:
osAdvice = MADV_WILLNEED;
break;
case 4:
osAdvice = MADV_DONTNEED;
break;
case 5:
return -1;
break;
}
//printf("DO madvise: page=%d p=0x%lx 0x%lx size=0x%lx\n", page, p, start, size);fflush(stdout);
if (madvise((void *) start, size, osAdvice) != 0) {
jclass class_ioex = env->FindClass("java/io/IOException");
if (class_ioex == NULL) {
return -1;
}
env->ThrowNew(class_ioex, strerror(errno));
return -1;
}
return 0;
}
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