1/*
2 * Copyright (c) 1999, 2019, 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_LINUX_OS_LINUX_INLINE_HPP
26#define OS_LINUX_OS_LINUX_INLINE_HPP
27
28#include "runtime/os.hpp"
29#include "os_posix.inline.hpp"
30
31// System includes
32
33#include <unistd.h>
34#include <sys/socket.h>
35#include <poll.h>
36#include <netdb.h>
37
38// File names are case-insensitive on windows only
39inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
40 return strncmp(s1, s2, num);
41}
42
43inline bool os::uses_stack_guard_pages() {
44 return true;
45}
46
47inline bool os::must_commit_stack_guard_pages() {
48 assert(uses_stack_guard_pages(), "sanity check");
49 return true;
50}
51
52
53// On Linux, reservations are made on a page by page basis, nothing to do.
54inline void os::pd_split_reserved_memory(char *base, size_t size,
55 size_t split, bool realloc) {
56}
57
58
59// Bang the shadow pages if they need to be touched to be mapped.
60inline void os::map_stack_shadow_pages(address sp) {
61}
62
63inline void os::dll_unload(void *lib) {
64 ::dlclose(lib);
65}
66
67inline const int os::default_file_open_flags() { return 0;}
68
69inline jlong os::lseek(int fd, jlong offset, int whence) {
70 return (jlong) ::lseek64(fd, offset, whence);
71}
72
73inline int os::fsync(int fd) {
74 return ::fsync(fd);
75}
76
77inline int os::ftruncate(int fd, jlong length) {
78 return ::ftruncate64(fd, length);
79}
80
81// macros for restartable system calls
82
83#define RESTARTABLE(_cmd, _result) do { \
84 _result = _cmd; \
85 } while(((int)_result == OS_ERR) && (errno == EINTR))
86
87#define RESTARTABLE_RETURN_INT(_cmd) do { \
88 int _result; \
89 RESTARTABLE(_cmd, _result); \
90 return _result; \
91} while(false)
92
93inline bool os::numa_has_static_binding() { return true; }
94inline bool os::numa_has_group_homing() { return false; }
95
96inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
97 size_t res;
98 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
99 return res;
100}
101
102inline int os::close(int fd) {
103 return ::close(fd);
104}
105
106inline int os::socket_close(int fd) {
107 return ::close(fd);
108}
109
110inline int os::socket(int domain, int type, int protocol) {
111 return ::socket(domain, type, protocol);
112}
113
114inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
115 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
116}
117
118inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
119 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
120}
121
122inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
123 return os::send(fd, buf, nBytes, flags);
124}
125
126inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
127 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
128}
129
130inline struct hostent* os::get_host_by_name(char* name) {
131 return ::gethostbyname(name);
132}
133
134inline bool os::supports_monotonic_clock() {
135 return os::Posix::supports_monotonic_clock();
136}
137
138inline void os::exit(int num) {
139 ::exit(num);
140}
141
142#endif // OS_LINUX_OS_LINUX_INLINE_HPP
143