os_bsd.inline.hpp revision 6402:2377269bd73d
1/* 2 * Copyright (c) 1999, 2014, 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.inline.hpp" 29#include "runtime/orderAccess.inline.hpp" 30#include "runtime/os.hpp" 31 32// System includes 33 34#include <unistd.h> 35#include <sys/socket.h> 36#include <sys/poll.h> 37#include <netdb.h> 38 39inline void* os::thread_local_storage_at(int index) { 40 return pthread_getspecific((pthread_key_t)index); 41} 42 43inline const char* os::file_separator() { 44 return "/"; 45} 46 47inline const char* os::line_separator() { 48 return "\n"; 49} 50 51inline const char* os::path_separator() { 52 return ":"; 53} 54 55// File names are case-sensitive on windows only 56inline int os::file_name_strcmp(const char* s1, const char* s2) { 57 return strcmp(s1, s2); 58} 59 60inline bool os::obsolete_option(const JavaVMOption *option) { 61 return false; 62} 63 64inline bool os::uses_stack_guard_pages() { 65 return true; 66} 67 68inline bool os::allocate_stack_guard_pages() { 69 assert(uses_stack_guard_pages(), "sanity check"); 70#if !defined(__FreeBSD__) || __FreeBSD__ < 5 71 // Since FreeBSD 4 uses malloc() for allocating the thread stack 72 // there is no need to do anything extra to allocate the guard pages 73 return false; 74#else 75 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. 76 // Must 'allocate' them or guard pages are ignored. 77 return true; 78#endif 79} 80 81 82// On Bsd, reservations are made on a page by page basis, nothing to do. 83inline void os::pd_split_reserved_memory(char *base, size_t size, 84 size_t split, bool realloc) { 85} 86 87 88// Bang the shadow pages if they need to be touched to be mapped. 89inline void os::bang_stack_shadow_pages() { 90} 91 92inline void os::dll_unload(void *lib) { 93 ::dlclose(lib); 94} 95 96inline const int os::default_file_open_flags() { return 0;} 97 98inline DIR* os::opendir(const char* dirname) 99{ 100 assert(dirname != NULL, "just checking"); 101 return ::opendir(dirname); 102} 103 104inline int os::readdir_buf_size(const char *path) 105{ 106 return NAME_MAX + sizeof(dirent) + 1; 107} 108 109inline jlong os::lseek(int fd, jlong offset, int whence) { 110 return (jlong) ::lseek(fd, offset, whence); 111} 112 113inline int os::fsync(int fd) { 114 return ::fsync(fd); 115} 116 117inline char* os::native_path(char *path) { 118 return path; 119} 120 121inline int os::ftruncate(int fd, jlong length) { 122 return ::ftruncate(fd, length); 123} 124 125inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 126{ 127 dirent* p; 128 int status; 129 assert(dirp != NULL, "just checking"); 130 131 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 132 // version. Here is the doc for this function: 133 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 134 135 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 136 errno = status; 137 return NULL; 138 } else 139 return p; 140} 141 142inline int os::closedir(DIR *dirp) { 143 assert(dirp != NULL, "argument is NULL"); 144 return ::closedir(dirp); 145} 146 147// macros for restartable system calls 148 149#define RESTARTABLE(_cmd, _result) do { \ 150 _result = _cmd; \ 151 } while(((int)_result == OS_ERR) && (errno == EINTR)) 152 153#define RESTARTABLE_RETURN_INT(_cmd) do { \ 154 int _result; \ 155 RESTARTABLE(_cmd, _result); \ 156 return _result; \ 157} while(false) 158 159inline bool os::numa_has_static_binding() { return true; } 160inline bool os::numa_has_group_homing() { return false; } 161 162inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 163 size_t res; 164 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 165 return res; 166} 167 168inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 169 size_t res; 170 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 171 return res; 172} 173 174inline int os::close(int fd) { 175 return ::close(fd); 176} 177 178inline int os::socket_close(int fd) { 179 return ::close(fd); 180} 181 182inline int os::socket(int domain, int type, int protocol) { 183 return ::socket(domain, type, protocol); 184} 185 186inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 187 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 188} 189 190inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 191 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 192} 193 194inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 195 return os::send(fd, buf, nBytes, flags); 196} 197 198inline int os::timeout(int fd, long timeout) { 199 julong prevtime,newtime; 200 struct timeval t; 201 202 gettimeofday(&t, NULL); 203 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 204 205 for(;;) { 206 struct pollfd pfd; 207 208 pfd.fd = fd; 209 pfd.events = POLLIN | POLLERR; 210 211 int res = ::poll(&pfd, 1, timeout); 212 213 if (res == OS_ERR && errno == EINTR) { 214 215 // On Bsd any value < 0 means "forever" 216 217 if(timeout >= 0) { 218 gettimeofday(&t, NULL); 219 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 220 timeout -= newtime - prevtime; 221 if(timeout <= 0) 222 return OS_OK; 223 prevtime = newtime; 224 } 225 } else 226 return res; 227 } 228} 229 230inline int os::listen(int fd, int count) { 231 return ::listen(fd, count); 232} 233 234inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 235 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 236} 237 238inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 239 // At least OpenBSD and FreeBSD can return EINTR from accept. 240 RESTARTABLE_RETURN_INT(::accept(fd, him, len)); 241} 242 243inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 244 sockaddr* from, socklen_t* fromlen) { 245 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 246} 247 248inline int os::sendto(int fd, char* buf, size_t len, uint flags, 249 struct sockaddr *to, socklen_t tolen) { 250 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 251} 252 253inline int os::socket_shutdown(int fd, int howto) { 254 return ::shutdown(fd, howto); 255} 256 257inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 258 return ::bind(fd, him, len); 259} 260 261inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 262 return ::getsockname(fd, him, len); 263} 264 265inline int os::get_host_name(char* name, int namelen) { 266 return ::gethostname(name, namelen); 267} 268 269inline struct hostent* os::get_host_by_name(char* name) { 270 return ::gethostbyname(name); 271} 272 273inline int os::get_sock_opt(int fd, int level, int optname, 274 char *optval, socklen_t* optlen) { 275 return ::getsockopt(fd, level, optname, optval, optlen); 276} 277 278inline int os::set_sock_opt(int fd, int level, int optname, 279 const char* optval, socklen_t optlen) { 280 return ::setsockopt(fd, level, optname, optval, optlen); 281} 282 283inline bool os::supports_monotonic_clock() { 284#ifdef __APPLE__ 285 return true; 286#else 287 return Bsd::_clock_gettime != NULL; 288#endif 289} 290 291#endif // OS_BSD_VM_OS_BSD_INLINE_HPP 292