Faster event processing when epoll transport is used
Motivation: Before we used a long[] to store the ready events, this had a few problems and limitations: - An extra loop was needed to translate between epoll_event and our long - JNI may need to do extra memory copy if the JVM not supports pinning - More branches Modifications: - Introduce a EpollEventArray which allows to directly write in a struct epoll_event* and pass it to epoll_wait. Result: Better speed when using native transport, as shown in the benchmark. Before: [xxx@xxx wrk]$ ./wrk -H 'Connection: keep-alive' -d 120 -c 256 -t 16 -s scripts/pipeline-many.lua http://xxx:8080/plaintext Running 2m test @ http://xxx:8080/plaintext 16 threads and 256 connections Thread Stats Avg Stdev Max +/- Stdev Latency 14.56ms 8.64ms 117.15ms 80.58% Req/Sec 286.17k 38.71k 421.48k 68.17% 546324329 requests in 2.00m, 73.78GB read Requests/sec: 4553438.39 Transfer/sec: 629.66MB After: [xxx@xxx wrk]$ ./wrk -H 'Connection: keep-alive' -d 120 -c 256 -t 16 -s scripts/pipeline-many.lua http://xxx:8080/plaintext Running 2m test @ http://xxx:8080/plaintext 16 threads and 256 connections Thread Stats Avg Stdev Max +/- Stdev Latency 14.12ms 8.69ms 100.40ms 83.08% Req/Sec 294.79k 40.23k 472.70k 66.75% 555997226 requests in 2.00m, 75.08GB read Requests/sec: 4634343.40 Transfer/sec: 640.85MB
This commit is contained in:
Norman Maurer
parent
27a25e29f7
commit
ed98ce27e1
@ -30,6 +30,7 @@
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <sys/utsname.h>
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#include <stddef.h>
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#include "io_netty_channel_epoll_Native.h"
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// optional
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@ -104,20 +105,12 @@ char* exceptionMessage(char* msg, int error) {
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return result;
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}
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jint epollCtl(JNIEnv* env, jint efd, int op, jint fd, jint flags, jint id) {
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uint32_t events = (flags & EPOLL_EDGE) ? EPOLLET : 0;
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if (flags & EPOLL_READ) {
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events |= EPOLLIN | EPOLLRDHUP;
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}
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if (flags & EPOLL_WRITE) {
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events |= EPOLLOUT;
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}
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jint epollCtl(JNIEnv* env, jint efd, int op, jint fd, jint flags) {
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uint32_t events = flags;
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struct epoll_event ev = {
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.events = events,
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// encode the id into the events
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.data.u64 = (((uint64_t) id) << 32L)
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.data.fd = fd,
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.events = events
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};
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return epoll_ctl(efd, op, fd, &ev);
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@ -620,9 +613,8 @@ JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollCreate(JNIEnv* en
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return efd;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollWait(JNIEnv* env, jclass clazz, jint efd, jlongArray events, jint timeout) {
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int len = (*env)->GetArrayLength(env, events);
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struct epoll_event ev[len];
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollWait0(JNIEnv* env, jclass clazz, jint efd, jlong address, jint len, jint timeout) {
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struct epoll_event *ev = (struct epoll_event*) address;
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int ready;
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int err;
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do {
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@ -631,60 +623,20 @@ JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollWait(JNIEnv* env,
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} while (ready == -1 && ((err = errno) == EINTR));
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if (ready < 0) {
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throwIOException(env, exceptionMessage("epoll_wait() failed: ", err));
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return -1;
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return -err;
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}
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if (ready == 0) {
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// nothing ready for process
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return 0;
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}
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jboolean isCopy;
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// Use GetPrimitiveArrayCritical and ReleasePrimitiveArrayCritical to signal the VM that we really would like
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// to not do a memory copy here. This is ok as we not do any blocking action here anyway.
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// This is important as the VM may suspend GC for the time!
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jlong* elements = (*env)->GetPrimitiveArrayCritical(env, events, &isCopy);
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if (elements == NULL) {
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// No memory left ?!?!?
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throwOutOfMemoryError(env);
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return -1;
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}
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int i;
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for (i = 0; i < ready; i++) {
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// store the ready ops and id
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elements[i] = (jlong) ev[i].data.u64;
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if (ev[i].events & EPOLLIN) {
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elements[i] |= EPOLL_READ;
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}
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if (ev[i].events & EPOLLRDHUP) {
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elements[i] |= EPOLL_RDHUP;
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}
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if (ev[i].events & EPOLLOUT) {
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elements[i] |= EPOLL_WRITE;
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}
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}
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jint mode;
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// release again to prevent memory leak
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if (isCopy) {
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mode = 0;
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} else {
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// was just pinned so use JNI_ABORT to eliminate not needed copy.
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mode = JNI_ABORT;
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}
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(*env)->ReleasePrimitiveArrayCritical(env, events, elements, mode);
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return ready;
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}
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JNIEXPORT void JNICALL Java_io_netty_channel_epoll_Native_epollCtlAdd(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags, jint id) {
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if (epollCtl(env, efd, EPOLL_CTL_ADD, fd, flags, id) < 0) {
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JNIEXPORT void JNICALL Java_io_netty_channel_epoll_Native_epollCtlAdd(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags) {
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if (epollCtl(env, efd, EPOLL_CTL_ADD, fd, flags) < 0) {
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int err = errno;
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throwRuntimeException(env, exceptionMessage("epoll_ctl() failed: ", err));
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}
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}
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JNIEXPORT void JNICALL Java_io_netty_channel_epoll_Native_epollCtlMod(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags, jint id) {
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if (epollCtl(env, efd, EPOLL_CTL_MOD, fd, flags, id) < 0) {
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JNIEXPORT void JNICALL Java_io_netty_channel_epoll_Native_epollCtlMod(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags) {
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if (epollCtl(env, efd, EPOLL_CTL_MOD, fd, flags) < 0) {
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int err = errno;
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throwRuntimeException(env, exceptionMessage("epoll_ctl() failed: ", err));
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}
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@ -1526,4 +1478,26 @@ JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_sendFd0(JNIEnv* env, j
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return -1;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollet(JNIEnv* env, jclass clazz) {
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return EPOLLET;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollin(JNIEnv* env, jclass clazz) {
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return EPOLLIN;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollout(JNIEnv* env, jclass clazz) {
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return EPOLLOUT;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_epollrdhup(JNIEnv* env, jclass clazz) {
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return EPOLLRDHUP;
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_sizeofEpollEvent(JNIEnv* env, jclass clazz) {
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return sizeof(struct epoll_event);
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}
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JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_offsetofEpollData(JNIEnv* env, jclass clazz) {
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return offsetof(struct epoll_event, data);
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}
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@ -16,12 +16,6 @@
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#include <jni.h>
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#include <limits.h>
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#define EPOLL_READ 0x01
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#define EPOLL_WRITE 0x02
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#define EPOLL_RDHUP 0x04
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#define EPOLL_EDGE 0x08
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// Define SO_REUSEPORT if not found to fix build issues.
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// See https://github.com/netty/netty/issues/2558
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#ifndef SO_REUSEPORT
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@ -43,9 +37,9 @@ jint Java_io_netty_channel_epoll_Native_eventFd(JNIEnv* env, jclass clazz);
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void Java_io_netty_channel_epoll_Native_eventFdWrite(JNIEnv* env, jclass clazz, jint fd, jlong value);
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void Java_io_netty_channel_epoll_Native_eventFdRead(JNIEnv* env, jclass clazz, jint fd);
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jint Java_io_netty_channel_epoll_Native_epollCreate(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_epollWait(JNIEnv* env, jclass clazz, jint efd, jlongArray events, jint timeout);
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void Java_io_netty_channel_epoll_Native_epollCtlAdd(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags, jint id);
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void Java_io_netty_channel_epoll_Native_epollCtlMod(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags, jint id);
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jint Java_io_netty_channel_epoll_Native_epollWait0(JNIEnv* env, jclass clazz, jint efd, jlong address, jint length, jint timeout);
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void Java_io_netty_channel_epoll_Native_epollCtlAdd(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags);
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void Java_io_netty_channel_epoll_Native_epollCtlMod(JNIEnv* env, jclass clazz, jint efd, jint fd, jint flags);
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void Java_io_netty_channel_epoll_Native_epollCtlDel(JNIEnv* env, jclass clazz, jint efd, jint fd);
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jint Java_io_netty_channel_epoll_Native_write0(JNIEnv* env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit);
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jint Java_io_netty_channel_epoll_Native_writeAddress0(JNIEnv* env, jclass clazz, jint fd, jlong address, jint pos, jint limit);
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@ -117,3 +111,10 @@ jint Java_io_netty_channel_epoll_Native_errnoEAGAIN(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEWOULDBLOCK(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_errnoEINPROGRESS(JNIEnv* env, jclass clazz);
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jstring Java_io_netty_channel_epoll_Native_strError(JNIEnv* env, jclass clazz, jint err);
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jint Java_io_netty_channel_epoll_Native_epollin(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_epollout(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_epollrdhup(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_epollet(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_sizeofEpollEvent(JNIEnv* env, jclass clazz);
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jint Java_io_netty_channel_epoll_Native_offsetofEpollData(JNIEnv* env, jclass clazz);
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@ -38,7 +38,6 @@ abstract class AbstractEpollChannel extends AbstractChannel {
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protected int flags = Native.EPOLLET;
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protected volatile boolean active;
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int id;
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AbstractEpollChannel(int fd, int flag) {
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this(null, fd, flag, false);
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@ -0,0 +1,104 @@
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/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.epoll;
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import io.netty.util.internal.PlatformDependent;
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/**
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* This is an internal datastructure which can be directly passed to epoll_wait to reduce the overhead.
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*
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* typedef union epoll_data {
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* void *ptr;
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* int fd;
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* uint32_t u32;
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* uint64_t u64;
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* } epoll_data_t;
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*
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* struct epoll_event {
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* uint32_t events; // Epoll events
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* epoll_data_t data; // User data variable
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* };
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*
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* We use {@code fd} if the {@code epoll_data union} to store the actual file descriptor of an
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* {@link AbstractEpollChannel} and so be able to map it later.
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*/
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final class EpollEventArray {
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// Size of the epoll_event struct
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private static final int EPOLL_EVENT_SIZE = Native.sizeofEpollEvent();
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// The offsiet of the data union in the epoll_event struct
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private static final int EPOLL_DATA_OFFSET = Native.offsetofEpollData();
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private long memoryAddress;
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private int length;
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EpollEventArray(int length) {
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if (length < 1) {
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throw new IllegalArgumentException("length must be >= 1 but was " + length);
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}
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this.length = length;
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memoryAddress = allocate(length);
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}
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private static long allocate(int length) {
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return PlatformDependent.allocateMemory(length * EPOLL_EVENT_SIZE);
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}
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/**
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* Return the {@code memoryAddress} which points to the start of this {@link EpollEventArray}.
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*/
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long memoryAddress() {
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return memoryAddress;
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}
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/**
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* Return the length of the {@link EpollEventArray} which represent the maximum number of {@code epoll_events}
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* that can be stored in it.
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*/
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int length() {
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return length;
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}
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/**
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* Increase the storage of this {@link EpollEventArray}.
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*/
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void increase() {
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// double the size
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length <<= 1;
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free();
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memoryAddress = allocate(length);
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}
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/**
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* Free this {@link EpollEventArray}. Any usage after calling this method may segfault the JVM!
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*/
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void free() {
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PlatformDependent.freeMemory(memoryAddress);
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}
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/**
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* Return the events for the {@code epoll_event} on this index.
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*/
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int events(int index) {
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return PlatformDependent.getInt(memoryAddress + index * EPOLL_EVENT_SIZE);
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}
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/**
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* Return the file descriptor for the {@code epoll_event} on this index.
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*/
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int fd(int index) {
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return PlatformDependent.getInt(memoryAddress + index * EPOLL_EVENT_SIZE + EPOLL_DATA_OFFSET);
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}
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}
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@ -50,11 +50,9 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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private final int epollFd;
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private final int eventFd;
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private final IntObjectMap<AbstractEpollChannel> ids = new IntObjectHashMap<AbstractEpollChannel>();
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private final IntObjectMap<AbstractEpollChannel> channels = new IntObjectHashMap<AbstractEpollChannel>(4096);
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private final boolean allowGrowing;
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private long[] events;
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private int id;
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private final EpollEventArray events;
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@SuppressWarnings("unused")
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private volatile int wakenUp;
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@ -64,10 +62,10 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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super(parent, executor, false);
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if (maxEvents == 0) {
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allowGrowing = true;
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events = new long[128];
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events = new EpollEventArray(4096);
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} else {
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allowGrowing = false;
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events = new long[maxEvents];
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events = new EpollEventArray(maxEvents);
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}
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boolean success = false;
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int epollFd = -1;
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@ -75,7 +73,7 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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try {
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this.epollFd = epollFd = Native.epollCreate();
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this.eventFd = eventFd = Native.eventFd();
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Native.epollCtlAdd(epollFd, eventFd, Native.EPOLLIN, 0);
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Native.epollCtlAdd(epollFd, eventFd, Native.EPOLLIN);
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success = true;
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} finally {
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if (!success) {
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@ -97,29 +95,6 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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}
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}
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private int nextId() {
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int id = this.id;
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if (id == Integer.MAX_VALUE) {
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// We used all possible ints in the past ( 1 - Integer.MAX_VALUE), time to scrub the stored channels
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// and re-assign ids.
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AbstractEpollChannel[] channels = ids.values(AbstractEpollChannel.class);
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ids.clear();
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id = 0;
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for (AbstractEpollChannel ch: channels) {
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id++;
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ch.id = id;
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ids.put(ch.id, ch);
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}
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if (id == Integer.MAX_VALUE) {
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throw new IllegalStateException("Could not scrub ids");
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}
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}
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this.id = ++id;
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return id;
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}
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@Override
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protected void wakeup(boolean inEventLoop) {
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if (!inEventLoop && WAKEN_UP_UPDATER.compareAndSet(this, 0, 1)) {
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@ -133,10 +108,9 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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*/
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void add(AbstractEpollChannel ch) {
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assert inEventLoop();
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int id = nextId();
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Native.epollCtlAdd(epollFd, ch.fd().intValue(), ch.flags, id);
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ch.id = id;
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ids.put(id, ch);
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int fd = ch.fd().intValue();
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Native.epollCtlAdd(epollFd, fd, ch.flags);
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channels.put(fd, ch);
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}
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/**
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@ -144,7 +118,7 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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*/
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void modify(AbstractEpollChannel ch) {
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assert inEventLoop();
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Native.epollCtlMod(epollFd, ch.fd().intValue(), ch.flags, ch.id);
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Native.epollCtlMod(epollFd, ch.fd().intValue(), ch.flags);
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}
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/**
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@ -152,12 +126,16 @@ final class EpollEventLoop extends SingleThreadEventLoop {
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*/
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void remove(AbstractEpollChannel ch) {
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assert inEventLoop();
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if (ids.remove(ch.id) != null && ch.isOpen()) {
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if (ch.isOpen()) {
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int fd = ch.fd().intValue();
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if (channels.remove(fd) != null) {
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// Remove the epoll. This is only needed if it's still open as otherwise it will be automatically
|
||||
// removed once the file-descriptor is closed.
|
||||
Native.epollCtlDel(epollFd, ch.fd().intValue());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Queue<Runnable> newTaskQueue() {
|
||||
@ -183,7 +161,7 @@ final class EpollEventLoop extends SingleThreadEventLoop {
|
||||
this.ioRatio = ioRatio;
|
||||
}
|
||||
|
||||
private int epollWait(boolean oldWakenUp) {
|
||||
private int epollWait(boolean oldWakenUp) throws IOException {
|
||||
int selectCnt = 0;
|
||||
long currentTimeNanos = System.nanoTime();
|
||||
long selectDeadLineNanos = currentTimeNanos + delayNanos(currentTimeNanos);
|
||||
@ -275,9 +253,9 @@ final class EpollEventLoop extends SingleThreadEventLoop {
|
||||
final long ioTime = System.nanoTime() - ioStartTime;
|
||||
runAllTasks(ioTime * (100 - ioRatio) / ioRatio);
|
||||
}
|
||||
if (allowGrowing && ready == events.length) {
|
||||
// double the size of the array as we needed the whole space for the events
|
||||
events = new long[events.length << 1];
|
||||
if (allowGrowing && ready == events.length()) {
|
||||
//increase the size of the array as we needed the whole space for the events
|
||||
events.increase();
|
||||
}
|
||||
if (isShuttingDown()) {
|
||||
closeAll();
|
||||
@ -300,41 +278,52 @@ final class EpollEventLoop extends SingleThreadEventLoop {
|
||||
}
|
||||
|
||||
private void closeAll() {
|
||||
try {
|
||||
Native.epollWait(epollFd, events, 0);
|
||||
Collection<AbstractEpollChannel> channels = new ArrayList<AbstractEpollChannel>(ids.size());
|
||||
} catch (IOException ignore) {
|
||||
// ignore on close
|
||||
}
|
||||
Collection<AbstractEpollChannel> array = new ArrayList<AbstractEpollChannel>(channels.size());
|
||||
|
||||
for (IntObjectMap.Entry<AbstractEpollChannel> entry: ids.entries()) {
|
||||
channels.add(entry.value());
|
||||
for (IntObjectMap.Entry<AbstractEpollChannel> entry: channels.entries()) {
|
||||
array.add(entry.value());
|
||||
}
|
||||
|
||||
for (AbstractEpollChannel ch: channels) {
|
||||
for (AbstractEpollChannel ch: array) {
|
||||
ch.unsafe().close(ch.unsafe().voidPromise());
|
||||
}
|
||||
}
|
||||
|
||||
private void processReady(long[] events, int ready) {
|
||||
private void processReady(EpollEventArray events, int ready) {
|
||||
for (int i = 0; i < ready; i ++) {
|
||||
final long ev = events[i];
|
||||
|
||||
int id = (int) (ev >> 32L);
|
||||
if (id == 0) {
|
||||
final int fd = events.fd(i);
|
||||
if (fd == eventFd) {
|
||||
// consume wakeup event
|
||||
Native.eventFdRead(eventFd);
|
||||
} else {
|
||||
AbstractEpollChannel ch = ids.get(id);
|
||||
if (ch != null) {
|
||||
final long ev = events.events(i);
|
||||
|
||||
AbstractEpollChannel ch = channels.get(fd);
|
||||
if (ch != null && ch.isOpen()) {
|
||||
boolean close = (ev & Native.EPOLLRDHUP) != 0;
|
||||
boolean read = (ev & Native.EPOLLIN) != 0;
|
||||
boolean write = (ev & Native.EPOLLOUT) != 0;
|
||||
|
||||
AbstractEpollUnsafe unsafe = (AbstractEpollUnsafe) ch.unsafe();
|
||||
if ((ev & Native.EPOLLOUT) != 0 && ch.isOpen()) {
|
||||
if (write) {
|
||||
// force flush of data as the epoll is writable again
|
||||
unsafe.epollOutReady();
|
||||
}
|
||||
if ((ev & Native.EPOLLIN) != 0 && ch.isOpen()) {
|
||||
if (read) {
|
||||
// Something is ready to read, so consume it now
|
||||
unsafe.epollInReady();
|
||||
}
|
||||
if ((ev & Native.EPOLLRDHUP) != 0 && ch.isOpen()) {
|
||||
if (close) {
|
||||
unsafe.epollRdHupReady();
|
||||
}
|
||||
} else {
|
||||
// We received an event for an fd which we not use anymore. Remove it from the epoll_event set.
|
||||
Native.epollCtlDel(epollFd, fd);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -342,6 +331,7 @@ final class EpollEventLoop extends SingleThreadEventLoop {
|
||||
|
||||
@Override
|
||||
protected void cleanup() {
|
||||
try {
|
||||
try {
|
||||
Native.close(epollFd);
|
||||
} catch (IOException e) {
|
||||
@ -352,5 +342,9 @@ final class EpollEventLoop extends SingleThreadEventLoop {
|
||||
} catch (IOException e) {
|
||||
logger.warn("Failed to close the event fd.", e);
|
||||
}
|
||||
} finally {
|
||||
// release native memory
|
||||
events.free();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -37,6 +37,8 @@ public final class EpollSocketChannel extends AbstractEpollStreamChannel impleme
|
||||
|
||||
EpollSocketChannel(Channel parent, int fd) {
|
||||
super(parent, fd);
|
||||
// Add EPOLLRDHUP so we are notified once the remote peer close the connection.
|
||||
flags |= Native.EPOLLRDHUP;
|
||||
config = new EpollSocketChannelConfig(this);
|
||||
// Directly cache the remote and local addresses
|
||||
// See https://github.com/netty/netty/issues/2359
|
||||
@ -46,6 +48,8 @@ public final class EpollSocketChannel extends AbstractEpollStreamChannel impleme
|
||||
|
||||
public EpollSocketChannel() {
|
||||
super(Native.socketStreamFd());
|
||||
// Add EPOLLRDHUP so we are notified once the remote peer close the connection.
|
||||
flags |= Native.EPOLLRDHUP;
|
||||
config = new EpollSocketChannelConfig(this);
|
||||
}
|
||||
|
||||
|
||||
@ -49,10 +49,10 @@ final class Native {
|
||||
}
|
||||
|
||||
// EventLoop operations and constants
|
||||
public static final int EPOLLIN = 0x01;
|
||||
public static final int EPOLLOUT = 0x02;
|
||||
public static final int EPOLLRDHUP = 0x04;
|
||||
public static final int EPOLLET = 0x08;
|
||||
public static final int EPOLLIN = epollin();
|
||||
public static final int EPOLLOUT = epollout();
|
||||
public static final int EPOLLRDHUP = epollrdhup();
|
||||
public static final int EPOLLET = epollet();
|
||||
|
||||
public static final int IOV_MAX = iovMax();
|
||||
public static final int UIO_MAX_IOV = uioMaxIov();
|
||||
@ -134,9 +134,18 @@ final class Native {
|
||||
public static native void eventFdWrite(int fd, long value);
|
||||
public static native void eventFdRead(int fd);
|
||||
public static native int epollCreate();
|
||||
public static native int epollWait(int efd, long[] events, int timeout);
|
||||
public static native void epollCtlAdd(int efd, final int fd, final int flags, final int id);
|
||||
public static native void epollCtlMod(int efd, final int fd, final int flags, final int id);
|
||||
public static int epollWait(int efd, EpollEventArray events, int timeout) throws IOException {
|
||||
int ready = epollWait0(efd, events.memoryAddress(), events.length(), timeout);
|
||||
if (ready < 0) {
|
||||
throw newIOException("epoll_wait", ready);
|
||||
}
|
||||
return ready;
|
||||
}
|
||||
private static native int epollWait0(int efd, long address, int len, int timeout);
|
||||
|
||||
public static native void epollCtlAdd(int efd, final int fd, final int flags);
|
||||
|
||||
public static native void epollCtlMod(int efd, final int fd, final int flags);
|
||||
public static native void epollCtlDel(int efd, final int fd);
|
||||
|
||||
private static native int errnoEBADF();
|
||||
@ -623,6 +632,15 @@ final class Native {
|
||||
|
||||
private static native int uioMaxIov();
|
||||
|
||||
// epoll_event related
|
||||
public static native int sizeofEpollEvent();
|
||||
public static native int offsetofEpollData();
|
||||
|
||||
private static native int epollin();
|
||||
private static native int epollout();
|
||||
private static native int epollrdhup();
|
||||
private static native int epollet();
|
||||
|
||||
private Native() {
|
||||
// utility
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user