jdk8-mips64-public/hotspot: src/os/linux/vm/os_linux.inline.hpp@7ae4e26cb1e0 (annotated)

src/os/linux/vm/os_linux.inline.hpp@7ae4e26cb1e0 (annotated)

src/os/linux/vm/os_linux.inline.hpp

Thu, 12 Oct 2017 21:27:07 +0800

author: aoqi
date: Thu, 12 Oct 2017 21:27:07 +0800
changeset 7535: 7ae4e26cb1e0
parent 6911: ce8f6bb717c9
parent 6876: 710a3c8b516e
child 9756: 2be326848943
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef OS_LINUX_VM_OS_LINUX_INLINE_HPP
 #define OS_LINUX_VM_OS_LINUX_INLINE_HPP
 #include "runtime/atomic.inline.hpp"
 #include "runtime/orderAccess.inline.hpp"
 #include "runtime/os.hpp"
 // System includes
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/poll.h>
 #include <netdb.h>
 inline void* os::thread_local_storage_at(int index) {
   return pthread_getspecific((pthread_key_t)index);
 }
 inline const char* os::file_separator() {
   return "/";
 }
 inline const char* os::line_separator() {
   return "\n";
 }
 inline const char* os::path_separator() {
   return ":";
 }
 // File names are case-sensitive on windows only
 inline int os::file_name_strcmp(const char* s1, const char* s2) {
   return strcmp(s1, s2);
 }
 inline bool os::obsolete_option(const JavaVMOption *option) {
   return false;
 }
 inline bool os::uses_stack_guard_pages() {
   return true;
 }
 inline bool os::allocate_stack_guard_pages() {
   assert(uses_stack_guard_pages(), "sanity check");
   return true;
 }
 // On Linux, reservations are made on a page by page basis, nothing to do.
 inline void os::pd_split_reserved_memory(char *base, size_t size,
                                       size_t split, bool realloc) {
 }
 // Bang the shadow pages if they need to be touched to be mapped.
 inline void os::bang_stack_shadow_pages() {
 }
 inline void os::dll_unload(void *lib) {
   ::dlclose(lib);
 }
 inline const int os::default_file_open_flags() { return 0;}
 inline DIR* os::opendir(const char* dirname)
 {
   assert(dirname != NULL, "just checking");
   return ::opendir(dirname);
 }
 inline int os::readdir_buf_size(const char *path)
 {
   return NAME_MAX + sizeof(dirent) + 1;
 }
 inline jlong os::lseek(int fd, jlong offset, int whence) {
   return (jlong) ::lseek64(fd, offset, whence);
 }
 inline int os::fsync(int fd) {
   return ::fsync(fd);
 }
 inline char* os::native_path(char *path) {
   return path;
 }
 inline int os::ftruncate(int fd, jlong length) {
   return ::ftruncate64(fd, length);
 }
 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
 {
   dirent* p;
   int status;
   assert(dirp != NULL, "just checking");
   // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
   // version. Here is the doc for this function:
   // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
     errno = status;
     return NULL;
   } else
     return p;
 }
 inline int os::closedir(DIR *dirp) {
   assert(dirp != NULL, "argument is NULL");
   return ::closedir(dirp);
 }
 // macros for restartable system calls
 #define RESTARTABLE(_cmd, _result) do { \
     _result = _cmd; \
   } while(((int)_result == OS_ERR) && (errno == EINTR))
 #define RESTARTABLE_RETURN_INT(_cmd) do { \
   int _result; \
   RESTARTABLE(_cmd, _result); \
   return _result; \
 } while(false)
 inline bool os::numa_has_static_binding()   { return true; }
 inline bool os::numa_has_group_homing()     { return false;  }
 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
   size_t res;
   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
   return res;
 }
 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
   size_t res;
   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
   return res;
 }
 inline int os::close(int fd) {
   return ::close(fd);
 }
 inline int os::socket_close(int fd) {
   return ::close(fd);
 }
 inline int os::socket(int domain, int type, int protocol) {
   return ::socket(domain, type, protocol);
 }
 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
 }
 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 }
 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
   return os::send(fd, buf, nBytes, flags);
 }
 inline int os::timeout(int fd, long timeout) {
   julong prevtime,newtime;
   struct timeval t;
   gettimeofday(&t, NULL);
   prevtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
   for(;;) {
     struct pollfd pfd;
     pfd.fd = fd;
     pfd.events = POLLIN | POLLERR;
     int res = ::poll(&pfd, 1, timeout);
     if (res == OS_ERR && errno == EINTR) {
       // On Linux any value < 0 means "forever"
       if(timeout >= 0) {
         gettimeofday(&t, NULL);
         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 os::listen(int fd, int count) {
   return ::listen(fd, count);
 }
 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 }
 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
   // Linux doc says this can't return EINTR, unlike accept() on Solaris.
   // But see attachListener_linux.cpp, LinuxAttachListener::dequeue().
   return (int)::accept(fd, him, len);
 }
 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
                         sockaddr* from, socklen_t* fromlen) {
   RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
 }
 inline int os::sendto(int fd, char* buf, size_t len, uint flags,
                       struct sockaddr* to, socklen_t tolen) {
   RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
 }
 inline int os::socket_shutdown(int fd, int howto) {
   return ::shutdown(fd, howto);
 }
 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) {
   return ::bind(fd, him, len);
 }
 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
   return ::getsockname(fd, him, len);
 }
 inline int os::get_host_name(char* name, int namelen) {
   return ::gethostname(name, namelen);
 }
 inline struct hostent* os::get_host_by_name(char* name) {
   return ::gethostbyname(name);
 }
 inline int os::get_sock_opt(int fd, int level, int optname,
                             char* optval, socklen_t* optlen) {
   return ::getsockopt(fd, level, optname, optval, optlen);
 }
 inline int os::set_sock_opt(int fd, int level, int optname,
                             const char* optval, socklen_t optlen) {
   return ::setsockopt(fd, level, optname, optval, optlen);
 }
 #endif // OS_LINUX_VM_OS_LINUX_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os/linux/vm/os_linux.inline.hpp@7ae4e26cb1e0 (annotated)

src/os/linux/vm/os_linux.inline.hpp