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# https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_mman.h.html
# https://man7.org/linux/man-pages/man2/mmap.2.html
# https://www.freebsd.org/cgi/man.cgi?query=mmap&sektion=2
from posix.types cimport off_t, mode_t
cdef extern from "<sys/mman.h>" nogil:
enum: PROT_EXEC # protection bits for mmap/mprotect
enum: PROT_READ
enum: PROT_WRITE
enum: PROT_NONE
enum: MAP_PRIVATE # flag bits for mmap
enum: MAP_SHARED
enum: MAP_FIXED
enum: MAP_ANON # These three are not in POSIX, but are
enum: MAP_ANONYMOUS # fairly common in spelling/semantics
enum: MAP_STACK
enum: MAP_LOCKED # Typically available only on Linux
enum: MAP_HUGETLB
enum: MAP_POPULATE
enum: MAP_NORESERVE
enum: MAP_GROWSDOWN
enum: MAP_NOCORE # Typically available only on BSD
enum: MAP_NOSYNC
void *MAP_FAILED
void *mmap(void *addr, size_t Len, int prot, int flags, int fd, off_t off)
int munmap(void *addr, size_t Len)
int mprotect(void *addr, size_t Len, int prot)
enum: MS_ASYNC
enum: MS_SYNC
enum: MS_INVALIDATE
int msync(void *addr, size_t Len, int flags)
enum: POSIX_MADV_NORMAL # POSIX advice flags
enum: POSIX_MADV_SEQUENTIAL
enum: POSIX_MADV_RANDOM
enum: POSIX_MADV_WILLNEED
enum: POSIX_MADV_DONTNEED
int posix_madvise(void *addr, size_t Len, int advice)
enum: MCL_CURRENT
enum: MCL_FUTURE
int mlock(const void *addr, size_t Len)
int munlock(const void *addr, size_t Len)
int mlockall(int flags)
int munlockall()
# Linux-specific
enum: MLOCK_ONFAULT
enum: MCL_ONFAULT
int mlock2(const void *addr, size_t len, int flags)
int shm_open(const char *name, int oflag, mode_t mode)
int shm_unlink(const char *name)
# often available
enum: MADV_NORMAL # pre-POSIX advice flags; should translate 1-1 to POSIX_*
enum: MADV_RANDOM # but in practice it is not always the same.
enum: MADV_SEQUENTIAL
enum: MADV_WILLNEED
enum: MADV_DONTNEED
enum: MADV_REMOVE # other pre-POSIX advice flags; often available
enum: MADV_DONTFORK
enum: MADV_DOFORK
enum: MADV_HWPOISON
enum: MADV_MERGEABLE,
enum: MADV_UNMERGEABLE
enum: MADV_SOFT_OFFLINE
enum: MADV_HUGEPAGE
enum: MADV_NOHUGEPAGE
enum: MADV_DONTDUMP
enum: MADV_DODUMP
enum: MADV_FREE
enum: MADV_WIPEONFORK
enum: MADV_KEEPONFORK
int madvise(void *addr, size_t Len, int advice)
# sometimes available
int mincore(void *addr, size_t Len, unsigned char *vec)
# These two are Linux specific but sometimes very efficient
void *mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
int remap_file_pages(void *addr, size_t Len, int prot,
size_t pgoff, int flags)
# The rare but standardized typed memory option
enum: POSIX_TYPED_MEM_ALLOCATE
enum: POSIX_TYPED_MEM_ALLOCATE_CONTIG
enum: POSIX_TYPED_MEM_MAP_ALLOCATABLE
int posix_typed_mem_open(const char *name, int oflag, int tflag)
int posix_mem_offset(const void *addr, size_t Len, off_t *off,
size_t *contig_len, int *fildes)
cdef struct posix_typed_mem_info:
size_t posix_tmi_length
int posix_typed_mem_get_info(int fildes, posix_typed_mem_info *info)
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