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#ifndef __EVIL_SYS_MMAN_H__
#define __EVIL_SYS_MMAN_H__
#include <sys/types.h>
/**
* @def PROT_NONE
* Data can not be accessed.
*/
/**
* @def PROT_READ
* Data can be read.
*/
/**
* @def PROT_WRITE
* Data can be written.
*/
/**
* @def PROT_EXEC
* Data can be executed.
*/
#define PROT_NONE 0x00
#define PROT_READ 0x01
#define PROT_WRITE 0x02
#define PROT_EXEC 0x04
/**
* @def MAP_SHARED
* Changes are shared.
*/
/**
* @def MAP_PRIVATE
* Changes are private.
*/
/**
* @def MAP_FIXED
* Interpret the address (addr) exactly.
*/
/**
* @def MAP_FAILED
* Error return from mmap().
*/
#define MAP_SHARED 0x0001
#define MAP_PRIVATE 0x0002
#define MAP_FIXED 0x0010
#define MAP_ANON 0x0020
#define MAP_ANONYMOUS MAP_ANON
#define MAP_FAILED ((void *)-1)
/**
* @file evil_mman.h
* @brief The file that provides the memory map functions
* @defgroup Evil_Mman Functions that manage memory mappping.
* @ingroup Evil
*
* This header provides the meomry map functions mmap and munmap.
*
*/
/**
* Creates or opens a named or unnamed file mapping object for a
* specified file and maps a view of a file mapping into the
* address space of a calling process.
*
* @param addr Unused
* @param len Number of bytes to be mapped.
* @param prot Protections.
* @param flags Type of the mapped object.
* @param fd File descriptor that describes the object to map.
* @param offset Number of bytes from which to start the mapping.
* @return The starting address of the mapped view on success, -1 otherwise.
*
* Create or open an unnamed file mapping object for a specified
* file described by the file descriptor @p fd. The number of
* bytes that are mapped is given by @p len and start after
* @p offset bytes. The parameter @p addr is unused.
*
* The only type of the mapped object that is supported is
* @c MAP_SHARED. If another value if given, -1 is returned.
*
* @p prot specifies the protection of the mapped region. If
* PROT_EXEC is used, it set the execute access. If PROT_READ
* is used, it sets the read access. If PROT_WRITE is used, it
* sets the write access.
*
* If the map view of file can not be created, -1 is returned.
* If the mappping can not be done, -1 is returned.
*
* If no error occurred, the starting address of the mapped view
* is returned.
*
* Conformity: None.
*
* Supported OS: Windows Vista, Windows XP or Windows 2000
* Professional.
*
* @ingroup Evil_Mman
*/
EAPI void *mmap(void *addr,
size_t len,
int prot,
int flags,
int fd,
off_t offset);
#ifndef HAVE_MMAP
# define HAVE_MMAP 1
#endif
/**
* Unmaps a mapped view of a file from the calling process's
* address space.
*
* @param addr Pointer to the base address.
* @param len Unused.
* @return 0 on success, -1 otherwise.
*
* Unmaps a mapped view of a file from the calling process's
* address space. @p addr is the pointer to the base address.
* This value must be identical to the value returned by a
* previous call to mmap(). The parameter @p len is unused.
*
* Conformity: None.
*
* Supported OS: Windows Vista, Windows XP or Windows 2000
* Professional.
*
* @ingroup Evil_Mman
*/
EAPI int munmap(void *addr,
size_t len);
/**
* Changes protection for the calling process' address.
*
* @param addr Pointer to the base address.
* @param len Length of the memory.
* @param prot New protection.
* @return 0 on success, -1 otherwise.
*
* Changes protection for the calling process' memory page.
* @p addr must be a valid adress in the user space. @p prot
* must be compatible with the old protection.
*
* Conformity: None.
*
* Supported OS: Windows Vista
*
* @ingroup Evil_Mman
*/
EAPI int mprotect(void *addr, size_t len, int prot);
#endif /* __EVIL_SYS_MMAN_H__ */
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