os_aix.inline.hpp revision 6683:08a2164660fb
1/* 2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2013 SAP AG. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#ifndef OS_AIX_VM_OS_AIX_INLINE_HPP 27#define OS_AIX_VM_OS_AIX_INLINE_HPP 28 29#include "runtime/os.hpp" 30 31// System includes 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// Defined in the system headers included above. 40#undef rem_size 41 42inline void* os::thread_local_storage_at(int index) { 43 return pthread_getspecific((pthread_key_t)index); 44} 45 46// File names are case-sensitive on windows only 47inline int os::file_name_strcmp(const char* s1, const char* s2) { 48 return strcmp(s1, s2); 49} 50 51inline bool os::obsolete_option(const JavaVMOption *option) { 52 return false; 53} 54 55inline bool os::uses_stack_guard_pages() { 56 return true; 57} 58 59inline bool os::allocate_stack_guard_pages() { 60 assert(uses_stack_guard_pages(), "sanity check"); 61 return true; 62} 63 64 65// On Aix, reservations are made on a page by page basis, nothing to do. 66inline void os::pd_split_reserved_memory(char *base, size_t size, 67 size_t split, bool realloc) { 68} 69 70 71// Bang the shadow pages if they need to be touched to be mapped. 72inline void os::bang_stack_shadow_pages() { 73} 74 75inline void os::dll_unload(void *lib) { 76 ::dlclose(lib); 77} 78 79inline const int os::default_file_open_flags() { return 0;} 80 81inline DIR* os::opendir(const char* dirname) 82{ 83 assert(dirname != NULL, "just checking"); 84 return ::opendir(dirname); 85} 86 87inline int os::readdir_buf_size(const char *path) 88{ 89 // according to aix sys/limits, NAME_MAX must be retrieved at runtime. */ 90 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX); 91 return my_NAME_MAX + sizeof(dirent) + 1; 92} 93 94inline jlong os::lseek(int fd, jlong offset, int whence) { 95 return (jlong) ::lseek64(fd, offset, whence); 96} 97 98inline int os::fsync(int fd) { 99 return ::fsync(fd); 100} 101 102inline char* os::native_path(char *path) { 103 return path; 104} 105 106inline int os::ftruncate(int fd, jlong length) { 107 return ::ftruncate64(fd, length); 108} 109 110inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 111{ 112 dirent* p; 113 int status; 114 assert(dirp != NULL, "just checking"); 115 116 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 117 // version. Here is the doc for this function: 118 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 119 120 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 121 errno = status; 122 return NULL; 123 } else 124 return p; 125} 126 127inline int os::closedir(DIR *dirp) { 128 assert(dirp != NULL, "argument is NULL"); 129 return ::closedir(dirp); 130} 131 132// macros for restartable system calls 133 134#define RESTARTABLE(_cmd, _result) do { \ 135 _result = _cmd; \ 136 } while(((int)_result == OS_ERR) && (errno == EINTR)) 137 138#define RESTARTABLE_RETURN_INT(_cmd) do { \ 139 int _result; \ 140 RESTARTABLE(_cmd, _result); \ 141 return _result; \ 142} while(false) 143 144// We don't have NUMA support on Aix, but we need this for compilation. 145inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; } 146inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; } 147 148inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 149 size_t res; 150 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 151 return res; 152} 153 154inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 155 size_t res; 156 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 157 return res; 158} 159 160inline int os::close(int fd) { 161 return ::close(fd); 162} 163 164inline int os::socket_close(int fd) { 165 return ::close(fd); 166} 167 168inline int os::socket(int domain, int type, int protocol) { 169 return ::socket(domain, type, protocol); 170} 171 172inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 173 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 174} 175 176inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 177 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 178} 179 180inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 181 return os::send(fd, buf, nBytes, flags); 182} 183 184inline int os::timeout(int fd, long timeout) { 185 julong prevtime,newtime; 186 struct timeval t; 187 188 gettimeofday(&t, NULL); 189 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 190 191 for(;;) { 192 struct pollfd pfd; 193 194 pfd.fd = fd; 195 pfd.events = POLLIN | POLLERR; 196 197 int res = ::poll(&pfd, 1, timeout); 198 199 if (res == OS_ERR && errno == EINTR) { 200 201 // On Linux any value < 0 means "forever" 202 203 if(timeout >= 0) { 204 gettimeofday(&t, NULL); 205 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 206 timeout -= newtime - prevtime; 207 if(timeout <= 0) 208 return OS_OK; 209 prevtime = newtime; 210 } 211 } else 212 return res; 213 } 214} 215 216inline int os::listen(int fd, int count) { 217 return ::listen(fd, count); 218} 219 220inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 221 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 222} 223 224inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 225 // Linux doc says this can't return EINTR, unlike accept() on Solaris. 226 // But see attachListener_linux.cpp, LinuxAttachListener::dequeue(). 227 return (int)::accept(fd, him, len); 228} 229 230inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 231 sockaddr* from, socklen_t* fromlen) { 232 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 233} 234 235inline int os::sendto(int fd, char* buf, size_t len, uint flags, 236 struct sockaddr* to, socklen_t tolen) { 237 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 238} 239 240inline int os::socket_shutdown(int fd, int howto) { 241 return ::shutdown(fd, howto); 242} 243 244inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 245 return ::bind(fd, him, len); 246} 247 248inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 249 return ::getsockname(fd, him, len); 250} 251 252inline int os::get_host_name(char* name, int namelen) { 253 return ::gethostname(name, namelen); 254} 255 256inline struct hostent* os::get_host_by_name(char* name) { 257 return ::gethostbyname(name); 258} 259 260inline int os::get_sock_opt(int fd, int level, int optname, 261 char* optval, socklen_t* optlen) { 262 return ::getsockopt(fd, level, optname, optval, optlen); 263} 264 265inline int os::set_sock_opt(int fd, int level, int optname, 266 const char* optval, socklen_t optlen) { 267 return ::setsockopt(fd, level, optname, optval, optlen); 268} 269 270inline bool os::supports_monotonic_clock() { 271 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments) 272 return true; 273} 274 275#endif // OS_AIX_VM_OS_AIX_INLINE_HPP 276