mman(5)

NAME

memory mapping definitions

#include <sys/mman.h>

The <sys/mman.h> header defines the following symbolic constants for use with the madvise() function:

MADV_NORMAL No further special treatment.

MADV_RANDOM Expect random page references.

MADV_SEQUENTIAL Expect sequential page references.

MADV_WILLNEED Will need these pages.

MADV_DONTNEED Will not need these pages.

MADV_SPACEAVAIL Ensure that resources are reserved.

The following symbolic constants are defined for use with the mmap() and mprotect() functions:

PROT_READ Region can be read.

PROT_WRITE Region can be written.

PROT_EXEC Region can be executed.

PROT_NONE Region cannot be accessed.

The following symbolic constants are defined for use with the mmap() function:

MAP_FILE Map a file.

MAP_ANONYMOUS Map an unnamed memory region.

MAP_VARIABLE Place region at implementation-computed address.

MAP_FIXED Place region at specified address.

MAP_SHARED Share changes made to mapped region.

MAP_PRIVATE Changes to mapped region are private to a process.

The following symbolic constants are defined for use with the msync() function:

MS_SYNC Perform synchronous writes.

MS_ASYNC Perform asynchronous writes.

MS_INVALIDATE Invalidate cached pages.

The following symbolic constants are defined for use with the msem_init(), msem_lock(), and msem_unlock() functions:

MSEM_LOCKED Create semaphore in locked state.

MSEM_UNLOCKED Create semaphore in unlocked state.

MSEM_IF_NOWAIT Do not wait if semaphore is locked.

MSEM_IF_WAITERS Do not unlock if semaphore has no waiters.

The typedef struct msemaphore is defined for use with the msem_init(), msem_lock(), msem_unlock(), and msem_remove() functions.

Hewlett-Packard Company — HP-UX Release 9.0: August 1992