| /* gnu_java_nio_channel_KqueueSelectorImpl.c -- |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 |
| USA |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| #if HAVE_CONFIG_H |
| #include <config.h> |
| #endif /* HAVE_CONFIG_H */ |
| |
| #include <sys/types.h> |
| #if HAVE_SYS_EVENT_H |
| #include <sys/event.h> |
| #endif /* HAVE_SYS_EVENT_H */ |
| #include <sys/time.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <jni.h> |
| #include <gnu_java_nio_KqueueSelectorImpl.h> |
| |
| #include <jcl.h> |
| |
| #define KEY_OP_ACCEPT 16 |
| #define KEY_OP_CONNECT 8 |
| #define KEY_OP_READ 1 |
| #define KEY_OP_WRITE 4 |
| |
| /* XXX this requires -std=gnu99 or c99 */ |
| /* #ifdef TRACE_KQUEUE */ |
| /* #define TRACE(fmt, ...) fprintf (stderr, "%s: " fmt "\n", __FUNCTION__, __VA_ARGS__); */ |
| /* #else */ |
| /* #define TRACE(fmt, ...) */ |
| /* #endif */ |
| |
| /* #define TRACE_KQUEUE 1 */ |
| |
| |
| #define throw_not_supported(env) JCL_ThrowException (env, "java/lang/UnsupportedOperationException", "kqueue/kevent support not available") |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: kqueue_supported |
| * Signature: ()Z |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_kqueue_1supported (JNIEnv *env __attribute__((unused)), |
| jclass clazz __attribute__((unused))) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| return JNI_TRUE; |
| #else |
| return JNI_FALSE; |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: sizeof_struct_kevent |
| * Signature: ()I |
| */ |
| JNIEXPORT jint JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_sizeof_1struct_1kevent |
| (JNIEnv *env __attribute__((unused)), jclass clazz __attribute__((unused))) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| /* TRACE("return sizeof %lu", sizeof (struct kevent)); */ |
| return sizeof (struct kevent); |
| #else |
| throw_not_supported (env); |
| return -1; |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: implOpen |
| * Signature: ()I |
| */ |
| JNIEXPORT jint JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_implOpen |
| (JNIEnv *env, jclass clazz __attribute__((unused))) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| int kq = kqueue (); |
| /* TRACE("kqueue returns %d", kq); */ |
| if (kq == -1) |
| JCL_ThrowException (env, "java/io/IOException", strerror (errno)); |
| return kq; |
| #else |
| throw_not_supported (env); |
| return -1; |
| #endif |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: implClose |
| * Signature: (I)V |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_implClose (JNIEnv *env, |
| jclass clazz __attribute__((unused)), |
| jint kq) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| /* TRACE("closing %d", kq); */ |
| if (close (kq) != 0) |
| JCL_ThrowException (env, "java/io/IOException", strerror (errno)); |
| #else |
| (void) kq; |
| throw_not_supported (env); |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: kevent_set |
| * Signature: (Ljava/nio/ByteBuffer;IIIZ)V |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_kevent_1set (JNIEnv *env, |
| jclass clazz __attribute__((unused)), |
| jobject nstate, jint i, jint fd, |
| jint ops, jint active, jint key) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| struct kevent *kev; |
| short ident; |
| |
| kev = (struct kevent *) (*env)->GetDirectBufferAddress (env, nstate); |
| |
| #ifdef TRACE_KQUEUE |
| printf ("kevent_set fd:%d p:%p i:%d ops:%x active:%x key:%x\n", |
| fd, (void *) kev, i, ops, active, key); |
| #endif /* TRACE_KQUEUE */ |
| |
| if (kev == NULL) |
| { |
| JCL_ThrowException (env, "java/lang/InternalError", |
| "GetDirectBufferAddress returned NULL!"); |
| return; |
| } |
| |
| ident = fd; |
| memset (&kev[i], 0, sizeof (struct kevent)); |
| |
| if ((ops & KEY_OP_READ) || (ops & KEY_OP_ACCEPT)) |
| { |
| /* Add event if it wasn't previously added. */ |
| if (!(active & KEY_OP_READ) && !(active & KEY_OP_ACCEPT)) |
| EV_SET(&kev[i], ident, EVFILT_READ, EV_ADD, 0, 0, (void *) key); |
| } |
| else |
| { |
| /* Delete event if it was previously added */ |
| if ((active & KEY_OP_READ) || (active & KEY_OP_ACCEPT)) |
| EV_SET(&kev[i], ident, EVFILT_READ, EV_DELETE, 0, 0, (void *) key); |
| } |
| |
| /* Do the same thing for the write filter. */ |
| if ((ops & KEY_OP_WRITE) || (ops & KEY_OP_CONNECT)) |
| { |
| if (!(active & KEY_OP_WRITE) && !(active & KEY_OP_CONNECT)) |
| EV_SET(&kev[i], ident, EVFILT_WRITE, EV_ADD, 0, 0, (void *) key); |
| } |
| else |
| { |
| if ((active & KEY_OP_WRITE) || (active & KEY_OP_CONNECT)) |
| EV_SET(&kev[i], ident, EVFILT_WRITE, EV_DELETE, 0, 0, (void *) key); |
| } |
| |
| #ifdef TRACE_KQUEUE |
| printf (" set kevent %2d: ident:%u filter:%x flags:%o fflags:%o data:%p udata:%p\n", |
| i, (unsigned) kev[i].ident, kev[i].filter, kev[i].flags, kev[i].fflags, |
| (void *) kev[i].data, kev[i].udata); |
| #endif /* TRACE_KQUEUE */ |
| #else |
| (void) nstate; |
| (void) i; |
| (void) fd; |
| (void) ops; |
| (void) key; |
| (void) active; |
| throw_not_supported (env); |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: kevent |
| * Signature: (ILjava/nio/ByteBuffer;IJ)I |
| */ |
| JNIEXPORT jint JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_kevent (JNIEnv *env, |
| jobject this __attribute__((unused)), |
| jint kq, jobject nstate, jint nevents, |
| jint maxevents, jlong timeout) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| struct timespec tv; |
| struct timespec *t = NULL; |
| struct kevent *kev = (struct kevent *) (*env)->GetDirectBufferAddress (env, nstate); |
| int ret; |
| |
| #ifdef TRACE_KQUEUE |
| int i; |
| |
| printf ("[%d] kevent nevents:%d maxevents:%d timeout:%lld\n", kq, nevents, maxevents, timeout); |
| printf ("[%d] addding/deleting %d events\n", kq, nevents); |
| for (i = 0; i < nevents; i++) |
| { |
| printf ("[%d] kevent input [%d]: ident:%u filter:%x flags:%o fflags:%o data:%p udata:%p\n", |
| kq, i, (unsigned) kev[i].ident, kev[i].filter, kev[i].flags, kev[i].fflags, |
| (void *) kev[i].data, kev[i].udata); |
| } |
| #endif |
| |
| /* TRACE("events: %p; nevents: %d; timeout: %lld", (void *) kev, nevents, timeout); */ |
| |
| if (timeout != -1) |
| { |
| tv.tv_sec = timeout / 1000; |
| tv.tv_nsec = (timeout % 1000) * 1000; |
| t = &tv; |
| } |
| |
| ret = kevent (kq, (const struct kevent *) kev, nevents, kev, maxevents, t); |
| |
| if (ret == -1) |
| { |
| if (errno == EINTR) |
| ret = 0; |
| else |
| JCL_ThrowException (env, "java/io/IOException", strerror (errno)); |
| } |
| |
| #ifdef TRACE_KQUEUE |
| for (i = 0; i < ret; i++) |
| { |
| printf ("[%d] kevent output [%d]: ident:%u filter:%x flags:%o fflags:%o data:%p udata:%p\n", |
| kq, i, (unsigned) kev[i].ident, kev[i].filter, kev[i].flags, kev[i].fflags, |
| (void *) kev[i].data, kev[i].udata); |
| } |
| #endif |
| |
| return ret; |
| #else |
| (void) kq; |
| (void) nstate; |
| (void) nevents; |
| (void) maxevents; |
| (void) timeout; |
| throw_not_supported (env); |
| return -1; |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: fetch_key |
| * Signature: (Ljava/nio/ByteBuffer;)I; |
| */ |
| JNIEXPORT jint JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_fetch_1key (JNIEnv *env, |
| jclass clazz __attribute__((unused)), |
| jobject nstate) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| struct kevent *kev = (struct kevent *) (*env)->GetDirectBufferAddress (env, nstate); |
| /* TRACE("return key %p\n", kev->udata); */ |
| return (jint) kev->udata; |
| #else |
| (void) nstate; |
| throw_not_supported (env); |
| return -1; |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: ready_ops |
| * Signature: (Ljava/nio/ByteBuffer;I)I |
| */ |
| JNIEXPORT jint JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_ready_1ops (JNIEnv *env, |
| jclass clazz __attribute__((unused)), |
| jobject nstate, jint interest) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| struct kevent *kev = (struct kevent *) (*env)->GetDirectBufferAddress (env, nstate); |
| jint ready = 0; |
| |
| if ((kev->flags & EV_ERROR) == EV_ERROR) |
| { |
| printf ("!!! error selecting fd %d: %s", (int) (kev->ident), strerror ((int) (kev->data))); |
| return 0; |
| } |
| |
| /* We poll for READ for OP_READ and OP_ACCEPT. */ |
| if (kev->filter == EVFILT_READ) |
| { |
| ready = (interest & KEY_OP_READ) | (interest & KEY_OP_ACCEPT); |
| /* TRACE("filter EVFILT_READ. Ready ops set to %x", ready); */ |
| } |
| |
| /* Poll for WRITE for OP_WRITE and OP_CONNECT; I guess we *should* |
| get a WRITE event if we are connected, but I don't know if we do |
| for real. FIXME */ |
| if (kev->filter == EVFILT_WRITE) |
| { |
| ready = (interest & KEY_OP_WRITE) | (interest & KEY_OP_CONNECT); |
| /* TRACE("filter EVFILT_WRITE. Ready ops set to %x", ready); */ |
| } |
| |
| return ready; |
| #else |
| (void) nstate; |
| (void) interest; |
| throw_not_supported (env); |
| return -1; |
| #endif /* HAVE_KQUEUE && HAVE_KEVENT */ |
| } |
| |
| |
| /* |
| * Class: gnu_java_nio_KqueueSelectorImpl |
| * Method: check_eof |
| * Signature: (Ljava/nio/ByteBuffer;)Z |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_gnu_java_nio_KqueueSelectorImpl_check_1eof (JNIEnv *env, |
| jclass clazz __attribute__((unused)), |
| jobject nstate) |
| { |
| #if defined(HAVE_KQUEUE) && defined(HAVE_KEVENT) |
| struct kevent *kev = (struct kevent *) (*env)->GetDirectBufferAddress (env, nstate); |
| if ((kev->flags & EV_EOF) == EV_EOF) |
| return JNI_TRUE; |
| return JNI_FALSE; |
| #else |
| (void) nstate; |
| throw_not_supported (env); |
| return JNI_FALSE; |
| #endif |
| } |
