diff options
Diffstat (limited to 'sysdeps/generic/sys/mman.h')
| -rw-r--r-- | sysdeps/generic/sys/mman.h | 74 |
1 files changed, 43 insertions, 31 deletions
diff --git a/sysdeps/generic/sys/mman.h b/sysdeps/generic/sys/mman.h index 9c2a1b62ce..6484e028c9 100644 --- a/sysdeps/generic/sys/mman.h +++ b/sysdeps/generic/sys/mman.h @@ -36,38 +36,48 @@ without PROT_READ. The only guarantees are that no writing will be allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */ -#define PROT_NONE 0x00 /* No access. */ -#define PROT_READ 0x04 /* Pages can be read. */ -#define PROT_WRITE 0x02 /* Pages can be written. */ -#define PROT_EXEC 0x01 /* Pages can be executed. */ +#define PROT_NONE 0x00 /* No access. */ +#define PROT_READ 0x04 /* Pages can be read. */ +#define PROT_WRITE 0x02 /* Pages can be written. */ +#define PROT_EXEC 0x01 /* Pages can be executed. */ /* Flags contain mapping type, sharing type and options. */ /* Mapping type (must choose one and only one of these). */ -#define MAP_FILE 0x0001 /* Mapped from a file or device. */ -#define MAP_ANON 0x0002 /* Allocated from anonymous virtual memory. */ -#define MAP_TYPE 0x000f /* Mask for type field. */ +#ifdef __USE_BSD +# define MAP_FILE 0x0001 /* Mapped from a file or device. */ +# define MAP_ANON 0x0002 /* Allocated from anonymous virtual memory. */ +# define MAP_TYPE 0x000f /* Mask for type field. */ +#endif /* Sharing types (must choose one and only one of these). */ -#define MAP_COPY 0x0020 /* Virtual copy of region at mapping time. */ -#define MAP_SHARED 0x0010 /* Share changes. */ -#define MAP_PRIVATE 0x0000 /* Changes private; copy pages on write. */ +#ifdef __USE_BSD +# define MAP_COPY 0x0020 /* Virtual copy of region at mapping time. */ +#endif +#define MAP_SHARED 0x0010 /* Share changes. */ +#define MAP_PRIVATE 0x0000 /* Changes private; copy pages on write. */ /* Other flags. */ -#define MAP_FIXED 0x0100 /* Map address must be exactly as requested. */ -#define MAP_NOEXTEND 0x0200 /* For MAP_FILE, don't change file size. */ -#define MAP_HASSEMPHORE 0x0400 /* Region may contain semaphores. */ -#define MAP_INHERIT 0x0800 /* Region is retained after exec. */ +#define MAP_FIXED 0x0100 /* Map address must be exactly as requested. */ +#ifdef __USE_BSD +# define MAP_NOEXTEND 0x0200 /* For MAP_FILE, don't change file size. */ +# define MAP_HASSEMPHORE 0x0400 /* Region may contain semaphores. */ +# define MAP_INHERIT 0x0800 /* Region is retained after exec. */ +#endif /* Advice to `madvise'. */ -#define MADV_NORMAL 0 /* No further special treatment. */ -#define MADV_RANDOM 1 /* Expect random page references. */ -#define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ -#define MADV_WILLNEED 3 /* Will need these pages. */ -#define MADV_DONTNEED 4 /* Don't need these pages. */ +#ifdef __USE_BSD +# define MADV_NORMAL 0 /* No further special treatment. */ +# define MADV_RANDOM 1 /* Expect random page references. */ +# define MADV_SEQUENTIAL 2 /* Expect sequential page references. */ +# define MADV_WILLNEED 3 /* Will need these pages. */ +# define MADV_DONTNEED 4 /* Don't need these pages. */ +#endif + +/* Return value of `mmap' in case of an error. */ +#define MAP_FAILED ((__caddr_t) -1) -#include <sys/cdefs.h> __BEGIN_DECLS /* Map addresses starting near ADDR and extending for LEN bytes. from @@ -75,34 +85,36 @@ __BEGIN_DECLS is nonzero, it is the desired mapping address. If the MAP_FIXED bit is set in FLAGS, the mapping will be at ADDR exactly (which must be page-aligned); otherwise the system chooses a convenient nearby address. - The return value is the actual mapping address chosen or (caddr_t) -1 + The return value is the actual mapping address chosen or MAP_FAILED for errors (in which case `errno' is set). A successful `mmap' call deallocates any previous mapping for the affected region. */ -__caddr_t __mmap __P ((__caddr_t __addr, size_t __len, - int __prot, int __flags, int __fd, __off_t __offset)); -__caddr_t mmap __P ((__caddr_t __addr, size_t __len, - int __prot, int __flags, int __fd, __off_t __offset)); +extern __caddr_t __mmap __P ((__caddr_t __addr, size_t __len, int __prot, + int __flags, int __fd, __off_t __offset)); +extern __caddr_t mmap __P ((__caddr_t __addr, size_t __len, int __prot, + int __flags, int __fd, __off_t __offset)); /* Deallocate any mapping for the region starting at ADDR and extending LEN bytes. Returns 0 if successful, -1 for errors (and sets errno). */ -int __munmap __P ((__caddr_t __addr, size_t __len)); -int munmap __P ((__caddr_t __addr, size_t __len)); +extern int __munmap __P ((__caddr_t __addr, size_t __len)); +extern int munmap __P ((__caddr_t __addr, size_t __len)); /* Change the memory protection of the region starting at ADDR and extending LEN bytes to PROT. Returns 0 if successful, -1 for errors (and sets errno). */ -int __mprotect __P ((__caddr_t __addr, size_t __len, int __prot)); -int mprotect __P ((__caddr_t __addr, size_t __len, int __prot)); +extern int __mprotect __P ((__caddr_t __addr, size_t __len, int __prot)); +extern int mprotect __P ((__caddr_t __addr, size_t __len, int __prot)); /* Synchronize the region starting at ADDR and extending LEN bytes with the file it maps. Filesystem operations on a file being mapped are unpredictable before this is done. Flags are from the MS_* set. */ -int msync __P ((__caddr_t __addr, size_t __len, int flags)); +extern int msync __P ((__caddr_t __addr, size_t __len, int __flags)); +#ifdef __USE_BSD /* Advise the system about particular usage patterns the program follows for the region starting at ADDR and extending LEN bytes. */ -int madvise __P ((__caddr_t __addr, size_t __len, int __advice)); +extern int madvise __P ((__caddr_t __addr, size_t __len, int __advice)); +#endif __END_DECLS |