1 #ifdef USE_PRAGMA_IDENT_HDR
   2 #pragma ident "@(#)hpi_linux.hpp        1.18 07/05/05 17:04:34 JVM"
   3 #endif
   4 /*
   5  * Copyright 1999-2005 Sun Microsystems, Inc.  All Rights Reserved.
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This code is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 only, as
  10  * published by the Free Software Foundation.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *  
  26  */
  27 
  28 //
  29 // Because the interruptible IO has been dropped for HotSpot/Linux,
  30 // the following HPI interface is very different from HotSparc.
  31 //
  32 
  33 #include <unistd.h>
  34 #include <sys/socket.h>
  35 #include <sys/poll.h>
  36 #include <sys/ioctl.h>
  37 #include <netdb.h>
  38 
  39 // HPI_FileInterface
  40 
  41 inline int hpi::close(int fd) {
  42   return ::close(fd);
  43 }
  44 
  45 inline size_t hpi::read(int fd, void *buf, unsigned int nBytes) {
  46   size_t res;
  47   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
  48   return res;
  49 }
  50 
  51 inline size_t hpi::write(int fd, const void *buf, unsigned int nBytes) {
  52   size_t res;
  53   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
  54   return res;
  55 }
  56 
  57 
  58 // HPI_SocketInterface
  59 
  60 inline int hpi::socket_close(int fd) {
  61   return ::close(fd);
  62 }
  63 
  64 inline int hpi::socket(int domain, int type, int protocol) {
  65   return ::socket(domain, type, protocol);
  66 }
  67 
  68 inline int hpi::recv(int fd, char *buf, int nBytes, int flags) {
  69   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, (unsigned int) flags));
  70 }
  71 
  72 inline int hpi::send(int fd, char *buf, int nBytes, int flags) {
  73   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, (unsigned int) flags));
  74 }
  75 
  76 inline int hpi::raw_send(int fd, char *buf, int nBytes, int flags) {
  77   return send(fd, buf, nBytes, flags);
  78 }
  79 
  80 inline int hpi::timeout(int fd, long timeout) {
  81   julong prevtime,newtime;
  82   struct timeval t;
  83 
  84   gettimeofday(&t, NULL);
  85   prevtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
  86 
  87   for(;;) {
  88     struct pollfd pfd;
  89 
  90     pfd.fd = fd;
  91     pfd.events = POLLIN | POLLERR;
  92   
  93     int res = ::poll(&pfd, 1, timeout);
  94 
  95     if (res == OS_ERR && errno == EINTR) {
  96 
  97       // On Linux any value < 0 means "forever"
  98 
  99       if(timeout >= 0) {
 100         gettimeofday(&t, NULL);
 101         newtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
 102         timeout -= newtime - prevtime;
 103         if(timeout <= 0)
 104           return OS_OK;
 105         prevtime = newtime;
 106       }
 107     } else
 108       return res;
 109   }
 110 }
 111 
 112 inline int hpi::listen(int fd, int count) {
 113   return ::listen(fd, count);
 114 }
 115 
 116 inline int hpi::connect(int fd, struct sockaddr *him, int len) {
 117   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 118 }
 119 
 120 inline int hpi::accept(int fd, struct sockaddr *him, int *len) {
 121   // This cast is from int to unsigned int on linux.  Since we
 122   // only pass the parameter "len" around the vm and don't try to
 123   // fetch it's value, this cast is safe for now. The java.net group
 124   // may need and want to change this interface someday if socklen_t goes
 125   // to 64 bits on some platform that we support.
 126   // Linux doc says this can't return EINTR, unlike accept() on Solaris
 127 
 128   return ::accept(fd, him, (socklen_t *)len);
 129 }
 130 
 131 inline int hpi::recvfrom(int fd, char *buf, int nBytes, int flags,
 132                          sockaddr *from, int *fromlen) {
 133   RESTARTABLE_RETURN_INT(::recvfrom(fd, buf, nBytes, (unsigned int) flags, from, (socklen_t *)fromlen));
 134 }
 135 
 136 inline int hpi::sendto(int fd, char *buf, int len, int flags,
 137                         struct sockaddr *to, int tolen) {
 138   RESTARTABLE_RETURN_INT(::sendto(fd, buf, len, (unsigned int) flags, to, tolen));
 139 }
 140 
 141 inline int hpi::socket_available(int fd, jint *pbytes) {
 142   // Linux doc says EINTR not returned, unlike Solaris
 143   int ret = ::ioctl(fd, FIONREAD, pbytes);
 144 
 145   //%% note ioctl can return 0 when successful, JVM_SocketAvailable
 146   // is expected to return 0 on failure and 1 on success to the jdk.
 147   return (ret < 0) ? 0 : 1;
 148 }
 149 
 150 
 151 // following methods have been updated to avoid problems in 
 152 // hpi's sockets calls based on sys_api_td.c (JDK1.3)
 153 
 154 /*
 155 HPIDECL(socket_shutdown, "socket_shutdown", _socket, SocketShutdown, 
 156         int, "%d",
 157         (int fd, int howto),
 158         ("fd = %d, howto = %d", fd, howto),
 159         (fd, howto));
 160         */
 161 inline int hpi::socket_shutdown(int fd, int howto){
 162   return ::shutdown(fd, howto);
 163 }
 164 
 165 /*
 166 HPIDECL(bind, "bind", _socket, Bind, 
 167         int, "%d",
 168         (int fd, struct sockaddr *him, int len),
 169         ("fd = %d, him = %p, len = %d",
 170          fd, him, len),
 171         (fd, him, len));
 172 */
 173 inline int hpi::bind(int fd, struct sockaddr *him, int len){
 174   return ::bind(fd, him, len);
 175 }
 176 
 177 /*
 178 HPIDECL(get_sock_name, "get_sock_name", _socket, GetSocketName, 
 179         int, "%d",
 180         (int fd, struct sockaddr *him, int *len),
 181         ("fd = %d, him = %p, len = %p",
 182          fd, him, len),
 183         (fd, him, len));
 184         */
 185 inline int hpi::get_sock_name(int fd, struct sockaddr *him, int *len){
 186   return ::getsockname(fd, him, (socklen_t *)len);
 187 }
 188 
 189 /*
 190 HPIDECL(get_host_name, "get_host_name", _socket, GetHostName, int, "%d",
 191         (char *hostname, int namelen),
 192         ("hostname = %p, namelen = %d",
 193          hostname, namelen),
 194         (hostname, namelen));
 195         */
 196 inline int hpi::get_host_name(char* name, int namelen){
 197   return ::gethostname(name, namelen);
 198 }
 199 
 200 /*
 201 HPIDECL(get_sock_opt, "get_sock_opt", _socket, SocketGetOption, int, "%d",
 202         (int fd, int level, int optname, char *optval, int* optlen),
 203         ("fd = %d, level = %d, optname = %d, optval = %p, optlen = %p",
 204          fd, level, optname, optval, optlen),
 205         (fd, level, optname, optval, optlen));
 206         */
 207 inline int hpi::get_sock_opt(int fd, int level, int optname, 
 208                              char *optval, int* optlen){
 209   return ::getsockopt(fd, level, optname, optval, (socklen_t *)optlen);
 210 }
 211 
 212 /*
 213 HPIDECL(set_sock_opt, "set_sock_opt", _socket, SocketSetOption, int, "%d",
 214         (int fd, int level, int optname, const char *optval, int optlen),
 215         ("fd = %d, level = %d, optname = %d, optval = %p, optlen = %d",
 216          fd, level, optname, optval, optlen),
 217         (fd, level, optname, optval, optlen));
 218         */
 219 inline int hpi::set_sock_opt(int fd, int level, int optname, 
 220                              const char *optval, int optlen){
 221   return ::setsockopt(fd, level, optname, optval, optlen);
 222 }
 223 
 224 
 225 // Reconciliation History
 226 // hpi_solaris.hpp      1.9 99/08/30 16:31:23
 227 // End