20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef OS_LINUX_GC_Z_ZBACKINGFILE_LINUX_HPP
25 #define OS_LINUX_GC_Z_ZBACKINGFILE_LINUX_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_LINUX_GC_Z_ZBACKINGFILE_LINUX_HPP
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20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef OS_LINUX_GC_Z_ZBACKINGFILE_LINUX_HPP
25 #define OS_LINUX_GC_Z_ZBACKINGFILE_LINUX_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 void warn_available_space(size_t max) const;
41 void warn_max_map_count(size_t max) const;
42
43 int create_mem_fd(const char* name) const;
44 int create_file_fd(const char* name) const;
45 int create_fd(const char* name) const;
46
47 bool is_tmpfs() const;
48 bool is_hugetlbfs() const;
49 bool tmpfs_supports_transparent_huge_pages() const;
50
51 ZErrno fallocate_compat_ftruncate(size_t size) const;
52 ZErrno fallocate_compat_mmap(size_t offset, size_t length, bool reserve_only) const;
53 ZErrno fallocate_compat_pwrite(size_t offset, size_t length) const;
54 ZErrno fallocate_fill_hole_compat(size_t offset, size_t length);
55 ZErrno fallocate_fill_hole_syscall(size_t offset, size_t length);
56 ZErrno fallocate_fill_hole(size_t offset, size_t length);
57 ZErrno fallocate_punch_hole(size_t offset, size_t length);
58 ZErrno split_and_fallocate(bool punch_hole, size_t offset, size_t length);
59 ZErrno fallocate(bool punch_hole, size_t offset, size_t length);
60
61 bool commit_inner(size_t offset, size_t length);
62
63 public:
64 ZBackingFile();
65
66 bool is_initialized() const;
67
68 void warn_commit_limits(size_t max) const;
69
70 size_t size() const;
71
72 size_t commit(size_t offset, size_t length);
73 size_t uncommit(size_t offset, size_t length);
74
75 void map(uintptr_t addr, size_t size, uintptr_t offset) const;
76 void unmap(uintptr_t addr, size_t size) const;
77 };
78
79 #endif // OS_LINUX_GC_Z_ZBACKINGFILE_LINUX_HPP
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