os_bsd.inline.hpp revision 4030:203f64878aab
1/* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef OS_BSD_VM_OS_BSD_INLINE_HPP 26#define OS_BSD_VM_OS_BSD_INLINE_HPP 27 28#include "runtime/atomic.hpp" 29#include "runtime/atomic.inline.hpp" 30#include "runtime/os.hpp" 31 32#ifdef TARGET_OS_ARCH_bsd_x86 33# include "orderAccess_bsd_x86.inline.hpp" 34#endif 35#ifdef TARGET_OS_ARCH_bsd_zero 36# include "orderAccess_bsd_zero.inline.hpp" 37#endif 38 39// System includes 40 41#include <unistd.h> 42#include <sys/socket.h> 43#include <sys/poll.h> 44#include <netdb.h> 45 46inline void* os::thread_local_storage_at(int index) { 47 return pthread_getspecific((pthread_key_t)index); 48} 49 50inline const char* os::file_separator() { 51 return "/"; 52} 53 54inline const char* os::line_separator() { 55 return "\n"; 56} 57 58inline const char* os::path_separator() { 59 return ":"; 60} 61 62// File names are case-sensitive on windows only 63inline int os::file_name_strcmp(const char* s1, const char* s2) { 64 return strcmp(s1, s2); 65} 66 67inline bool os::obsolete_option(const JavaVMOption *option) { 68 return false; 69} 70 71inline bool os::uses_stack_guard_pages() { 72 return true; 73} 74 75inline bool os::allocate_stack_guard_pages() { 76 assert(uses_stack_guard_pages(), "sanity check"); 77#if !defined(__FreeBSD__) || __FreeBSD__ < 5 78 // Since FreeBSD 4 uses malloc() for allocating the thread stack 79 // there is no need to do anything extra to allocate the guard pages 80 return false; 81#else 82 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. 83 // Must 'allocate' them or guard pages are ignored. 84 return true; 85#endif 86} 87 88 89// On Bsd, reservations are made on a page by page basis, nothing to do. 90inline void os::pd_split_reserved_memory(char *base, size_t size, 91 size_t split, bool realloc) { 92} 93 94 95// Bang the shadow pages if they need to be touched to be mapped. 96inline void os::bang_stack_shadow_pages() { 97} 98 99inline void os::dll_unload(void *lib) { 100 ::dlclose(lib); 101} 102 103inline const int os::default_file_open_flags() { return 0;} 104 105inline DIR* os::opendir(const char* dirname) 106{ 107 assert(dirname != NULL, "just checking"); 108 return ::opendir(dirname); 109} 110 111inline int os::readdir_buf_size(const char *path) 112{ 113 return NAME_MAX + sizeof(dirent) + 1; 114} 115 116inline jlong os::lseek(int fd, jlong offset, int whence) { 117 return (jlong) ::lseek(fd, offset, whence); 118} 119 120inline int os::fsync(int fd) { 121 return ::fsync(fd); 122} 123 124inline char* os::native_path(char *path) { 125 return path; 126} 127 128inline int os::ftruncate(int fd, jlong length) { 129 return ::ftruncate(fd, length); 130} 131 132inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 133{ 134 dirent* p; 135 int status; 136 assert(dirp != NULL, "just checking"); 137 138 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 139 // version. Here is the doc for this function: 140 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 141 142 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 143 errno = status; 144 return NULL; 145 } else 146 return p; 147} 148 149inline int os::closedir(DIR *dirp) { 150 assert(dirp != NULL, "argument is NULL"); 151 return ::closedir(dirp); 152} 153 154// macros for restartable system calls 155 156#define RESTARTABLE(_cmd, _result) do { \ 157 _result = _cmd; \ 158 } while(((int)_result == OS_ERR) && (errno == EINTR)) 159 160#define RESTARTABLE_RETURN_INT(_cmd) do { \ 161 int _result; \ 162 RESTARTABLE(_cmd, _result); \ 163 return _result; \ 164} while(false) 165 166inline bool os::numa_has_static_binding() { return true; } 167inline bool os::numa_has_group_homing() { return false; } 168 169inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 170 size_t res; 171 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 172 return res; 173} 174 175inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 176 size_t res; 177 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 178 return res; 179} 180 181inline int os::close(int fd) { 182 RESTARTABLE_RETURN_INT(::close(fd)); 183} 184 185inline int os::socket_close(int fd) { 186 RESTARTABLE_RETURN_INT(::close(fd)); 187} 188 189inline int os::socket(int domain, int type, int protocol) { 190 return ::socket(domain, type, protocol); 191} 192 193inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 194 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 195} 196 197inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 198 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 199} 200 201inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 202 return os::send(fd, buf, nBytes, flags); 203} 204 205inline int os::timeout(int fd, long timeout) { 206 julong prevtime,newtime; 207 struct timeval t; 208 209 gettimeofday(&t, NULL); 210 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 211 212 for(;;) { 213 struct pollfd pfd; 214 215 pfd.fd = fd; 216 pfd.events = POLLIN | POLLERR; 217 218 int res = ::poll(&pfd, 1, timeout); 219 220 if (res == OS_ERR && errno == EINTR) { 221 222 // On Bsd any value < 0 means "forever" 223 224 if(timeout >= 0) { 225 gettimeofday(&t, NULL); 226 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 227 timeout -= newtime - prevtime; 228 if(timeout <= 0) 229 return OS_OK; 230 prevtime = newtime; 231 } 232 } else 233 return res; 234 } 235} 236 237inline int os::listen(int fd, int count) { 238 return ::listen(fd, count); 239} 240 241inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 242 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 243} 244 245inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 246 // At least OpenBSD and FreeBSD can return EINTR from accept. 247 RESTARTABLE_RETURN_INT(::accept(fd, him, len)); 248} 249 250inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 251 sockaddr* from, socklen_t* fromlen) { 252 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 253} 254 255inline int os::sendto(int fd, char* buf, size_t len, uint flags, 256 struct sockaddr *to, socklen_t tolen) { 257 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 258} 259 260inline int os::socket_shutdown(int fd, int howto) { 261 return ::shutdown(fd, howto); 262} 263 264inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 265 return ::bind(fd, him, len); 266} 267 268inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 269 return ::getsockname(fd, him, len); 270} 271 272inline int os::get_host_name(char* name, int namelen) { 273 return ::gethostname(name, namelen); 274} 275 276inline struct hostent* os::get_host_by_name(char* name) { 277 return ::gethostbyname(name); 278} 279 280inline int os::get_sock_opt(int fd, int level, int optname, 281 char *optval, socklen_t* optlen) { 282 return ::getsockopt(fd, level, optname, optval, optlen); 283} 284 285inline int os::set_sock_opt(int fd, int level, int optname, 286 const char* optval, socklen_t optlen) { 287 return ::setsockopt(fd, level, optname, optval, optlen); 288} 289#endif // OS_BSD_VM_OS_BSD_INLINE_HPP 290