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 #ifndef OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP 25 #define OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP 26 27 #include "memory/allocation.hpp" 28 29 class ZBackingFile { 30 private: 31 static bool _hugetlbfs_mmap_retry; 32 33 int _fd; 34 uint64_t _filesystem; 35 size_t _available; 36 bool _initialized; 37 38 int create_mem_fd(const char* name) const; 39 int create_file_fd(const char* name) const; 40 int create_fd(const char* name) const; 41 42 bool is_tmpfs() const; 43 bool is_hugetlbfs() const; 44 bool tmpfs_supports_transparent_huge_pages() const; 45 46 bool try_split_and_expand_tmpfs(size_t offset, size_t length, size_t alignment) const; 47 bool try_expand_tmpfs(size_t offset, size_t length, size_t alignment) const; 48 bool try_expand_tmpfs(size_t offset, size_t length) const; 49 bool try_expand_hugetlbfs(size_t offset, size_t length) const; 50 bool try_expand_tmpfs_or_hugetlbfs(size_t offset, size_t length, size_t alignment) const; 51 52 public: 53 ZBackingFile(); 54 55 bool is_initialized() const; 56 57 int fd() const; 58 size_t available() const; 59 60 size_t try_expand(size_t offset, size_t length, size_t alignment) const; 61 }; 62 63 #endif // OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP | 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 #ifndef OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP 25 #define OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP 26 27 #include "memory/allocation.hpp" 28 29 class ZErrno; 30 31 class ZBackingFile { 32 private: 33 int _fd; 34 size_t _size; 35 uint64_t _filesystem; 36 size_t _block_size; 37 size_t _available; 38 bool _initialized; 39 40 int create_mem_fd(const char* name) const; 41 int create_file_fd(const char* name) const; 42 int create_fd(const char* name) const; 43 44 bool is_tmpfs() const; 45 bool is_hugetlbfs() const; 46 bool tmpfs_supports_transparent_huge_pages() const; 47 48 ZErrno fallocate_compat_ftruncate(size_t size) const; 49 ZErrno fallocate_compat_mmap(size_t offset, size_t length, bool reserve_only) const; 50 ZErrno fallocate_compat_pwrite(size_t offset, size_t length) const; 51 ZErrno fallocate_fill_hole_compat(size_t offset, size_t length); 52 ZErrno fallocate_fill_hole_syscall(size_t offset, size_t length); 53 ZErrno fallocate_fill_hole(size_t offset, size_t length); 54 ZErrno fallocate_punch_hole(size_t offset, size_t length); 55 ZErrno split_and_fallocate(bool punch_hole, size_t offset, size_t length); 56 ZErrno fallocate(bool punch_hole, size_t offset, size_t length); 57 58 bool commit_inner(size_t offset, size_t length); 59 60 public: 61 ZBackingFile(); 62 63 bool is_initialized() const; 64 65 int fd() const; 66 size_t size() const; 67 size_t available() const; 68 69 size_t commit(size_t offset, size_t length); 70 size_t uncommit(size_t offset, size_t length); 71 }; 72 73 #endif // OS_CPU_LINUX_X86_GC_Z_ZBACKINGFILE_LINUX_X86_HPP |