/*
* Copyright ( c ) 2008 , 2013 , Oracle and / or its affiliates . All rights reserved .
* Copyright ( c ) 2012 SAP SE . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation . Oracle designates this
* particular file as subject to the " Classpath " exception as provided
* by Oracle in the LICENSE file that accompanied this code .
*
* This code 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
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "sun_nio_ch_AixPollPort.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <poll.h>
#include <sys/pollset.h>
#include <fcntl.h>
#include <stddef.h>
#include <dlfcn.h>
#include <errno.h>
/* Initially copied from src/solaris/native/sun/nio/ch/nio_util.h */
#define RESTARTABLE(_cmd, _result) do { \
do { \
_result = _cmd; \
} while ((_result == -1 ) && (errno == EINTR)); \
} while (0 )
typedef pollset_t pollset_create_func(int maxfd);
typedef int pollset_destroy_func(pollset_t ps);
typedef int pollset_ctl_func(pollset_t ps, struct poll_ctl *pollctl_array, int array_length);
typedef int pollset_poll_func(pollset_t ps, struct pollfd *polldata_array, int array_length, int timeout);
static pollset_create_func* _pollset_create = NULL;
static pollset_destroy_func* _pollset_destroy = NULL;
static pollset_ctl_func* _pollset_ctl = NULL;
static pollset_poll_func* _pollset_poll = NULL;
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_init(JNIEnv* env, jclass this ) {
_pollset_create = (pollset_create_func*) dlsym(RTLD_DEFAULT, "pollset_create" );
_pollset_destroy = (pollset_destroy_func*) dlsym(RTLD_DEFAULT, "pollset_destroy" );
_pollset_ctl = (pollset_ctl_func*) dlsym(RTLD_DEFAULT, "pollset_ctl" );
_pollset_poll = (pollset_poll_func*) dlsym(RTLD_DEFAULT, "pollset_poll" );
if (_pollset_create == NULL || _pollset_destroy == NULL ||
_pollset_ctl == NULL || _pollset_poll == NULL) {
JNU_ThrowInternalError(env, "unable to get address of pollset functions" );
}
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_eventSize(JNIEnv* env, jclass this ) {
return sizeof (struct pollfd);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_eventsOffset(JNIEnv* env, jclass this ) {
return offsetof(struct pollfd, events);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_reventsOffset(JNIEnv* env, jclass this ) {
return offsetof(struct pollfd, revents);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_fdOffset(JNIEnv* env, jclass this ) {
return offsetof(struct pollfd, fd);
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_pollsetCreate(JNIEnv *env, jclass c) {
/* pollset_create can take the maximum number of fds, but we
* cannot predict this number so we leave it at OPEN_MAX. */
pollset_t ps = _pollset_create(-1 );
if (ps < 0 ) {
JNU_ThrowIOExceptionWithLastError(env, "pollset_create failed" );
}
return (int )ps;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_pollsetCtl(JNIEnv *env, jclass c, jint ps,
jint opcode, jint fd, jint events) {
struct poll_ctl event;
int res;
event.cmd = opcode;
event.events = events;
event.fd = fd;
RESTARTABLE(_pollset_ctl((pollset_t)ps, &event, 1 /* length */), res);
return (res == 0 ) ? 0 : errno;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_AixPollPort_pollsetPoll(JNIEnv *env, jclass c,
jint ps, jlong address, jint numfds) {
struct pollfd *events = jlong_to_ptr(address);
int res;
RESTARTABLE(_pollset_poll(ps, events, numfds, -1 ), res);
if (res < 0 ) {
JNU_ThrowIOExceptionWithLastError(env, "pollset_poll failed" );
}
return res;
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_pollsetDestroy(JNIEnv *env, jclass c, jint ps) {
int res;
RESTARTABLE(_pollset_destroy((pollset_t)ps), res);
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_socketpair(JNIEnv* env, jclass clazz, jintArray sv) {
int sp[2 ];
if (socketpair(PF_UNIX, SOCK_STREAM, 0 , sp) == -1 ) {
JNU_ThrowIOExceptionWithLastError(env, "socketpair failed" );
} else {
jint res[2 ];
res[0 ] = (jint)sp[0 ];
res[1 ] = (jint)sp[1 ];
(*env)->SetIntArrayRegion(env, sv, 0 , 2 , &res[0 ]);
}
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_interrupt(JNIEnv *env, jclass c, jint fd) {
int res;
int buf[1 ];
buf[0 ] = 1 ;
RESTARTABLE(write(fd, buf, 1 ), res);
if (res < 0 ) {
JNU_ThrowIOExceptionWithLastError(env, "write failed" );
}
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_drain1(JNIEnv *env, jclass cl, jint fd) {
int res;
char buf[1 ];
RESTARTABLE(read(fd, buf, 1 ), res);
if (res < 0 ) {
JNU_ThrowIOExceptionWithLastError(env, "drain1 failed" );
}
}
JNIEXPORT void JNICALL
Java_sun_nio_ch_AixPollPort_close0(JNIEnv *env, jclass c, jint fd) {
int res;
RESTARTABLE(close(fd), res);
}
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