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/*
* Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
#define OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP
#include "runtime/os.hpp"
#include "runtime/thread.hpp"
inline const char* os::dll_file_extension() { return ".dll"; }
inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;}
// File names are case-insensitive on windows only
inline int os::file_name_strcmp(const char* s, const char* t) {
return _stricmp(s, t);
}
inline void os::dll_unload(void *lib) {
::FreeLibrary((HMODULE)lib);
}
inline void* os::dll_lookup(void *lib, const char *name) {
return (void*)::GetProcAddress((HMODULE)lib, name);
}
inline bool os::obsolete_option(const JavaVMOption *option) {
return false;
}
inline bool os::uses_stack_guard_pages() {
return true;
}
inline bool os::must_commit_stack_guard_pages() {
return true;
}
inline int os::readdir_buf_size(const char *path)
{
/* As Windows doesn't use the directory entry buffer passed to
os::readdir() this can be as short as possible */
return 1;
}
// Bang the shadow pages if they need to be touched to be mapped.
inline void os::map_stack_shadow_pages(address sp) {
// Write to each page of our new frame to force OS mapping.
// If we decrement stack pointer more than one page
// the OS may not map an intervening page into our space
// and may fault on a memory access to interior of our frame.
const int page_size = os::win32::vm_page_size();
const size_t n_pages = JavaThread::stack_shadow_zone_size() / page_size;
for (size_t pages = 1; pages <= n_pages; pages++) {
sp -= page_size;
*sp = 0;
}
}
inline bool os::numa_has_static_binding() { return true; }
inline bool os::numa_has_group_homing() { return false; }
inline size_t os::read(int fd, void *buf, unsigned int nBytes) {
return ::read(fd, buf, nBytes);
}
inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
return ::read(fd, buf, nBytes);
}
inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
return ::write(fd, buf, nBytes);
}
inline int os::close(int fd) {
return ::close(fd);
}
inline bool os::supports_monotonic_clock() {
return true;
}
inline void os::exit(int num) {
win32::exit_process_or_thread(win32::EPT_PROCESS, num);
}
#endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP