| /** |
| * 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 <jni.h> |
| #include <fcntl.h> // posix_fadvise, constants for open |
| #include <string.h> // strerror |
| #include <errno.h> // errno |
| #include <unistd.h> // pread |
| #include <sys/mman.h> // posix_madvise, madvise |
| #include <sys/types.h> // constants for open |
| #include <sys/stat.h> // 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, "<init>", "()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; |
| } |