jdk8-mips64-public/hotspot: src/os/solaris/vm/hpi_solaris.hpp@8a25d96bcf08 (annotated)

src/os/solaris/vm/hpi_solaris.hpp@8a25d96bcf08 (annotated)

src/os/solaris/vm/hpi_solaris.hpp

Fri, 19 Dec 2008 14:40:28 -0800

author: xlu
date: Fri, 19 Dec 2008 14:40:28 -0800
changeset 934: 8a25d96bcf08
parent 657: 2a1a77d3458f
child 1907: c18cbe5936b8
permissions: -rw-r--r--

6784100: getTimeNanos - CAS reduction
Summary: Get rid of the CAS loop in getTimeNanos to reduce coherence traffic on Solaris.
Reviewed-by: acorn, kvn, ysr

 /*
  * Copyright 1998-2007 Sun Microsystems, Inc.  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.
  *
  * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 //
 // Parts of the HPI interface for which the HotSparc does not use the
 // HPI (because the interruptible IO mechanims used are different).
 //
 #include <sys/socket.h>
 #include <sys/poll.h>
 #include <sys/filio.h>
 #include <unistd.h>
 #include <netdb.h>
 #include <setjmp.h>
 // HPI_FileInterface
 // Many system calls can be interrupted by signals and must be restarted.
 // Restart support was added without disturbing the extent of thread
 // interruption support.
 inline int    hpi::close(int fd) {
   RESTARTABLE_RETURN_INT(::close(fd));
 }
 inline size_t hpi::read(int fd, void *buf, unsigned int nBytes) {
   INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
 }
 inline size_t hpi::write(int fd, const void *buf, unsigned int nBytes) {
   INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
 }
 // HPI_SocketInterface
 inline int    hpi::socket_close(int fd) {
   RESTARTABLE_RETURN_INT(::close(fd));
 }
 inline int    hpi::socket(int domain, int type, int protocol) {
   return ::socket(domain, type, protocol);
 }
 inline int    hpi::recv(int fd, char *buf, int nBytes, int flags) {
   INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
 }
 inline int    hpi::send(int fd, char *buf, int nBytes, int flags) {
   INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
 }
 inline int    hpi::raw_send(int fd, char *buf, int nBytes, int flags) {
   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 }
 // As both poll and select can be interrupted by signals, we have to be
 // prepared to restart the system call after updating the timeout, unless
 // a poll() is done with timeout == -1, in which case we repeat with this
 // "wait forever" value.
 inline int    hpi::timeout(int fd, long timeout) {
   int res;
   struct timeval t;
   julong prevtime, newtime;
   static const char* aNull = 0;
   struct pollfd pfd;
   pfd.fd = fd;
   pfd.events = POLLIN;
   gettimeofday(&t, &aNull);
   prevtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
   for(;;) {
     INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
     if(res == OS_ERR && errno == EINTR) {
         if(timeout != -1) {
             gettimeofday(&t, &aNull);
             newtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec /1000;
             timeout -= newtime - prevtime;
             if(timeout <= 0)
               return OS_OK;
             prevtime = newtime;
         }
     } else
       return res;
   }
 }
 inline int    hpi::listen(int fd, int count) {
   if (fd < 0)
     return OS_ERR;
   return ::listen(fd, count);
 }
 inline int
 hpi::connect(int fd, struct sockaddr *him, int len) {
   do {
     int _result;
     INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,
                             os::Solaris::clear_interrupted);
     // Depending on when thread interruption is reset, _result could be
     // one of two values when errno == EINTR
     if (((_result == OS_INTRPT) || (_result == OS_ERR)) && (errno == EINTR)) {
       /* restarting a connect() changes its errno semantics */
       INTERRUPTIBLE(::connect(fd, him, len), _result,
                       os::Solaris::clear_interrupted);
       /* undo these changes */
       if (_result == OS_ERR) {
         if (errno == EALREADY) errno = EINPROGRESS; /* fall through */
         else if (errno == EISCONN) { errno = 0; return OS_OK; }
       }
     }
     return _result;
   } while(false);
 }
 inline int    hpi::accept(int fd, struct sockaddr *him, int *len) {
   if (fd < 0)
     return OS_ERR;
   INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, (socklen_t*) len), os::Solaris::clear_interrupted);
 }
 inline int    hpi::recvfrom(int fd, char *buf, int nBytes, int flags,
                             sockaddr *from, int *fromlen) {
   //%%note jvm_r11
   INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, (unsigned int) flags, from, (socklen_t *)fromlen), os::Solaris::clear_interrupted);
 }
 inline int    hpi::sendto(int fd, char *buf, int len, int flags,
                           struct sockaddr *to, int tolen) {
   //%%note jvm_r11
   INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, (unsigned int) flags, to, tolen),os::Solaris::clear_interrupted);
 }
 inline int    hpi::socket_available(int fd, jint *pbytes) {
   if (fd < 0)
     return OS_OK;
   int ret;
   RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
   //%% note ioctl can return 0 when successful, JVM_SocketAvailable
   // is expected to return 0 on failure and 1 on success to the jdk.
   return (ret == OS_ERR) ? 0 : 1;
 }
 /*
 HPIDECL(socket_shutdown, "socket_shutdown", _socket, SocketShutdown,
         int, "%d",
         (int fd, int howto),
         ("fd = %d, howto = %d", fd, howto),
         (fd, howto));
         */
 inline int hpi::socket_shutdown(int fd, int howto){
   return ::shutdown(fd, howto);
 }
 /*
 HPIDECL(bind, "bind", _socket, Bind,
         int, "%d",
         (int fd, struct sockaddr *him, int len),
         ("fd = %d, him = %p, len = %d",
          fd, him, len),
         (fd, him, len));
 */
 inline int hpi::bind(int fd, struct sockaddr *him, int len){
   INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),os::Solaris::clear_interrupted);
 }
 /*
 HPIDECL(get_sock_name, "get_sock_name", _socket, GetSocketName,
         int, "%d",
         (int fd, struct sockaddr *him, int *len),
         ("fd = %d, him = %p, len = %p",
          fd, him, len),
         (fd, him, len));
         */
 inline int hpi::get_sock_name(int fd, struct sockaddr *him, int *len){
   return ::getsockname(fd, him, (socklen_t*) len);
 }
 /*
 HPIDECL(get_host_name, "get_host_name", _socket, GetHostName, int, "%d",
         (char *hostname, int namelen),
         ("hostname = %p, namelen = %d",
          hostname, namelen),
         (hostname, namelen));
         */
 inline int hpi::get_host_name(char* name, int namelen){
   return ::gethostname(name, namelen);
 }
 /*
 HPIDECL(get_sock_opt, "get_sock_opt", _socket, SocketGetOption, int, "%d",
         (int fd, int level, int optname, char *optval, int* optlen),
         ("fd = %d, level = %d, optname = %d, optval = %p, optlen = %p",
          fd, level, optname, optval, optlen),
         (fd, level, optname, optval, optlen));
         */
 inline int hpi::get_sock_opt(int fd, int level, int optname,
                              char *optval, int* optlen){
   return ::getsockopt(fd, level, optname, optval, (socklen_t*) optlen);
 }
 /*
 HPIDECL(set_sock_opt, "set_sock_opt", _socket, SocketSetOption, int, "%d",
         (int fd, int level, int optname, const char *optval, int optlen),
         ("fd = %d, level = %d, optname = %d, optval = %p, optlen = %d",
          fd, level, optname, optval, optlen),
         (fd, level, optname, optval, optlen));
         */
 inline int hpi::set_sock_opt(int fd, int level, int optname,
                              const char *optval, int optlen){
   return ::setsockopt(fd, level, optname, optval, optlen);
 }
 //Reconciliation History
 // 1.3 98/10/21 18:17:14 hpi_win32.hpp
 // 1.6 99/06/28 11:01:36 hpi_win32.hpp
 //End

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os/solaris/vm/hpi_solaris.hpp@8a25d96bcf08 (annotated)

src/os/solaris/vm/hpi_solaris.hpp