Sat, 12 Oct 2013 13:09:18 -0400
8025942: os::Bsd::available_memory() needs implementation
Summary: Implement using the host_statistics64() api.
Reviewed-by: dsamersoff, morris, dholmes, coleenp, hseigel, dcubed
Contributed-by: gerard.ziemski@oracle.com
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 */
25 #ifndef OS_BSD_VM_OS_BSD_INLINE_HPP
26 #define OS_BSD_VM_OS_BSD_INLINE_HPP
28 #include "runtime/atomic.inline.hpp"
29 #include "runtime/os.hpp"
31 #ifdef TARGET_OS_ARCH_bsd_x86
32 # include "orderAccess_bsd_x86.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_ARCH_bsd_zero
35 # include "orderAccess_bsd_zero.inline.hpp"
36 #endif
38 // System includes
40 #include <unistd.h>
41 #include <sys/socket.h>
42 #include <sys/poll.h>
43 #include <netdb.h>
45 inline void* os::thread_local_storage_at(int index) {
46 return pthread_getspecific((pthread_key_t)index);
47 }
49 inline const char* os::file_separator() {
50 return "/";
51 }
53 inline const char* os::line_separator() {
54 return "\n";
55 }
57 inline const char* os::path_separator() {
58 return ":";
59 }
61 // File names are case-sensitive on windows only
62 inline int os::file_name_strcmp(const char* s1, const char* s2) {
63 return strcmp(s1, s2);
64 }
66 inline bool os::obsolete_option(const JavaVMOption *option) {
67 return false;
68 }
70 inline bool os::uses_stack_guard_pages() {
71 return true;
72 }
74 inline bool os::allocate_stack_guard_pages() {
75 assert(uses_stack_guard_pages(), "sanity check");
76 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
77 // Since FreeBSD 4 uses malloc() for allocating the thread stack
78 // there is no need to do anything extra to allocate the guard pages
79 return false;
80 #else
81 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
82 // Must 'allocate' them or guard pages are ignored.
83 return true;
84 #endif
85 }
88 // On Bsd, reservations are made on a page by page basis, nothing to do.
89 inline void os::pd_split_reserved_memory(char *base, size_t size,
90 size_t split, bool realloc) {
91 }
94 // Bang the shadow pages if they need to be touched to be mapped.
95 inline void os::bang_stack_shadow_pages() {
96 }
98 inline void os::dll_unload(void *lib) {
99 ::dlclose(lib);
100 }
102 inline const int os::default_file_open_flags() { return 0;}
104 inline DIR* os::opendir(const char* dirname)
105 {
106 assert(dirname != NULL, "just checking");
107 return ::opendir(dirname);
108 }
110 inline int os::readdir_buf_size(const char *path)
111 {
112 return NAME_MAX + sizeof(dirent) + 1;
113 }
115 inline jlong os::lseek(int fd, jlong offset, int whence) {
116 return (jlong) ::lseek(fd, offset, whence);
117 }
119 inline int os::fsync(int fd) {
120 return ::fsync(fd);
121 }
123 inline char* os::native_path(char *path) {
124 return path;
125 }
127 inline int os::ftruncate(int fd, jlong length) {
128 return ::ftruncate(fd, length);
129 }
131 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
132 {
133 dirent* p;
134 int status;
135 assert(dirp != NULL, "just checking");
137 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
138 // version. Here is the doc for this function:
139 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
141 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
142 errno = status;
143 return NULL;
144 } else
145 return p;
146 }
148 inline int os::closedir(DIR *dirp) {
149 assert(dirp != NULL, "argument is NULL");
150 return ::closedir(dirp);
151 }
153 // macros for restartable system calls
155 #define RESTARTABLE(_cmd, _result) do { \
156 _result = _cmd; \
157 } while(((int)_result == OS_ERR) && (errno == EINTR))
159 #define RESTARTABLE_RETURN_INT(_cmd) do { \
160 int _result; \
161 RESTARTABLE(_cmd, _result); \
162 return _result; \
163 } while(false)
165 inline bool os::numa_has_static_binding() { return true; }
166 inline bool os::numa_has_group_homing() { return false; }
168 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
169 size_t res;
170 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
171 return res;
172 }
174 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
175 size_t res;
176 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
177 return res;
178 }
180 inline int os::close(int fd) {
181 return ::close(fd);
182 }
184 inline int os::socket_close(int fd) {
185 return ::close(fd);
186 }
188 inline int os::socket(int domain, int type, int protocol) {
189 return ::socket(domain, type, protocol);
190 }
192 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
193 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
194 }
196 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
197 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
198 }
200 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
201 return os::send(fd, buf, nBytes, flags);
202 }
204 inline int os::timeout(int fd, long timeout) {
205 julong prevtime,newtime;
206 struct timeval t;
208 gettimeofday(&t, NULL);
209 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
211 for(;;) {
212 struct pollfd pfd;
214 pfd.fd = fd;
215 pfd.events = POLLIN | POLLERR;
217 int res = ::poll(&pfd, 1, timeout);
219 if (res == OS_ERR && errno == EINTR) {
221 // On Bsd any value < 0 means "forever"
223 if(timeout >= 0) {
224 gettimeofday(&t, NULL);
225 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
226 timeout -= newtime - prevtime;
227 if(timeout <= 0)
228 return OS_OK;
229 prevtime = newtime;
230 }
231 } else
232 return res;
233 }
234 }
236 inline int os::listen(int fd, int count) {
237 return ::listen(fd, count);
238 }
240 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
241 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
242 }
244 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
245 // At least OpenBSD and FreeBSD can return EINTR from accept.
246 RESTARTABLE_RETURN_INT(::accept(fd, him, len));
247 }
249 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
250 sockaddr* from, socklen_t* fromlen) {
251 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
252 }
254 inline int os::sendto(int fd, char* buf, size_t len, uint flags,
255 struct sockaddr *to, socklen_t tolen) {
256 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
257 }
259 inline int os::socket_shutdown(int fd, int howto) {
260 return ::shutdown(fd, howto);
261 }
263 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) {
264 return ::bind(fd, him, len);
265 }
267 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
268 return ::getsockname(fd, him, len);
269 }
271 inline int os::get_host_name(char* name, int namelen) {
272 return ::gethostname(name, namelen);
273 }
275 inline struct hostent* os::get_host_by_name(char* name) {
276 return ::gethostbyname(name);
277 }
279 inline int os::get_sock_opt(int fd, int level, int optname,
280 char *optval, socklen_t* optlen) {
281 return ::getsockopt(fd, level, optname, optval, optlen);
282 }
284 inline int os::set_sock_opt(int fd, int level, int optname,
285 const char* optval, socklen_t optlen) {
286 return ::setsockopt(fd, level, optname, optval, optlen);
287 }
289 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP