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29 * @(#)mman.h 8.2 (Berkeley) 1/9/95
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
41 * Inheritance for minherit()
43 #define INHERIT_SHARE 0
44 #define INHERIT_COPY 1
45 #define INHERIT_NONE 2
49 * Protections are chosen from these bits, or-ed together
51 #define PROT_NONE 0x00 /* no permissions */
52 #define PROT_READ 0x01 /* pages can be read */
53 #define PROT_WRITE 0x02 /* pages can be written */
54 #define PROT_EXEC 0x04 /* pages can be executed */
57 * Flags contain sharing type and options.
58 * Sharing types; choose one.
60 #define MAP_SHARED 0x0001 /* share changes */
61 #define MAP_PRIVATE 0x0002 /* changes are private */
63 #define MAP_COPY MAP_PRIVATE /* Obsolete */
69 #define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
72 #define MAP_RENAME 0x0020 /* Sun: rename private pages to file */
73 #define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */
74 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
75 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
76 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
77 #define MAP_STACK 0x0400 /* region grows down, like a stack */
78 #define MAP_NOSYNC 0x0800 /* page to but do not sync underlying file */
83 #define MAP_FILE 0x0000 /* map from file (default) */
84 #define MAP_ANON 0x1000 /* allocated from memory, swap space */
86 #define MAP_ANONYMOUS MAP_ANON /* For compatibility. */
92 #define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */
93 #define MAP_NOCORE 0x00020000 /* dont include these pages in a coredump */
94 #define MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */
96 #define MAP_32BIT 0x00080000 /* map in the low 2GB of address space */
100 * Request specific alignment (n == log2 of the desired alignment).
102 * MAP_ALIGNED_SUPER requests optimal superpage alignment, but does
103 * not enforce a specific alignment.
105 #define MAP_ALIGNED(n) ((n) << MAP_ALIGNMENT_SHIFT)
106 #define MAP_ALIGNMENT_SHIFT 24
107 #define MAP_ALIGNMENT_MASK MAP_ALIGNED(0xff)
108 #define MAP_ALIGNED_SUPER MAP_ALIGNED(1) /* align on a superpage */
109 #endif /* __BSD_VISIBLE */
111 #if __POSIX_VISIBLE >= 199309
113 * Process memory locking
115 #define MCL_CURRENT 0x0001 /* Lock only current memory */
116 #define MCL_FUTURE 0x0002 /* Lock all future memory as well */
120 * Error return from mmap()
122 #define MAP_FAILED ((void *)-1)
127 #define MS_SYNC 0x0000 /* msync synchronously */
128 #define MS_ASYNC 0x0001 /* return immediately */
129 #define MS_INVALIDATE 0x0002 /* invalidate all cached data */
134 #define _MADV_NORMAL 0 /* no further special treatment */
135 #define _MADV_RANDOM 1 /* expect random page references */
136 #define _MADV_SEQUENTIAL 2 /* expect sequential page references */
137 #define _MADV_WILLNEED 3 /* will need these pages */
138 #define _MADV_DONTNEED 4 /* dont need these pages */
141 #define MADV_NORMAL _MADV_NORMAL
142 #define MADV_RANDOM _MADV_RANDOM
143 #define MADV_SEQUENTIAL _MADV_SEQUENTIAL
144 #define MADV_WILLNEED _MADV_WILLNEED
145 #define MADV_DONTNEED _MADV_DONTNEED
146 #define MADV_FREE 5 /* dont need these pages, and junk contents */
147 #define MADV_NOSYNC 6 /* try to avoid flushes to physical media */
148 #define MADV_AUTOSYNC 7 /* revert to default flushing strategy */
149 #define MADV_NOCORE 8 /* do not include these pages in a core file */
150 #define MADV_CORE 9 /* revert to including pages in a core file */
151 #define MADV_PROTECT 10 /* protect process from pageout kill */
154 * Return bits from mincore
156 #define MINCORE_INCORE 0x1 /* Page is incore */
157 #define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */
158 #define MINCORE_MODIFIED 0x4 /* Page has been modified by us */
159 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
160 #define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */
161 #define MINCORE_SUPER 0x20 /* Page is a "super" page */
164 * Anonymous object constant for shm_open().
166 #define SHM_ANON ((char *)1)
167 #endif /* __BSD_VISIBLE */
170 * XXX missing POSIX_TYPED_MEM_* macros and
171 * posix_typed_mem_info structure.
173 #if __POSIX_VISIBLE >= 200112
174 #define POSIX_MADV_NORMAL _MADV_NORMAL
175 #define POSIX_MADV_RANDOM _MADV_RANDOM
176 #define POSIX_MADV_SEQUENTIAL _MADV_SEQUENTIAL
177 #define POSIX_MADV_WILLNEED _MADV_WILLNEED
178 #define POSIX_MADV_DONTNEED _MADV_DONTNEED
181 #ifndef _MODE_T_DECLARED
182 typedef __mode_t mode_t;
183 #define _MODE_T_DECLARED
186 #ifndef _OFF_T_DECLARED
187 typedef __off_t off_t;
188 #define _OFF_T_DECLARED
191 #ifndef _SIZE_T_DECLARED
192 typedef __size_t size_t;
193 #define _SIZE_T_DECLARED
196 #if defined(_KERNEL) || defined(_WANT_FILE)
197 #include <sys/lock.h>
198 #include <sys/mutex.h>
199 #include <sys/queue.h>
200 #include <sys/rangelock.h>
207 vm_object_t shm_object;
215 * Values maintained solely to make this a better-behaved file
216 * descriptor for fstat() to run on.
218 struct timespec shm_atime;
219 struct timespec shm_mtime;
220 struct timespec shm_ctime;
221 struct timespec shm_birthtime;
224 struct label *shm_label; /* MAC label */
225 const char *shm_path;
227 struct rangelock shm_rl;
233 int shm_mmap(struct shmfd *shmfd, vm_size_t objsize, vm_ooffset_t foff,
235 int shm_map(struct file *fp, size_t size, off_t offset, void **memp);
236 int shm_unmap(struct file *fp, void *mem, size_t size);
237 void shm_path(struct shmfd *shmfd, char *path, size_t size);
243 * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(),
244 * posix_typed_mem_open().
247 int getpagesizes(size_t *, int);
248 int madvise(void *, size_t, int);
249 int mincore(const void *, size_t, char *);
250 int minherit(void *, size_t, int);
252 int mlock(const void *, size_t);
253 #ifndef _MMAP_DECLARED
254 #define _MMAP_DECLARED
255 void * mmap(void *, size_t, int, int, int, off_t);
257 int mprotect(const void *, size_t, int);
258 int msync(void *, size_t, int);
259 int munlock(const void *, size_t);
260 int munmap(void *, size_t);
261 #if __POSIX_VISIBLE >= 200112
262 int posix_madvise(void *, size_t, int);
264 #if __POSIX_VISIBLE >= 199309
266 int munlockall(void);
267 int shm_open(const char *, int, mode_t);
268 int shm_unlink(const char *);
272 #endif /* !_KERNEL */
274 #endif /* !_SYS_MMAN_H_ */