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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_UNIX_MEM_MAP_H_INCLUDED_
#define _NXT_UNIX_MEM_MAP_H_INCLUDED_
#define NXT_MEM_MAP_FAILED MAP_FAILED
#define NXT_MEM_MAP_READ PROT_READ
#define NXT_MEM_MAP_WRITE PROT_WRITE
#if (NXT_HAVE_MAP_ANONYMOUS)
#define NXT_MEM_MAP_ANON MAP_ANONYMOUS
#else
#define NXT_MEM_MAP_ANON MAP_ANON
#endif
#define NXT_MEM_MAP_SHARED (MAP_SHARED | NXT_MEM_MAP_ANON)
#if (NXT_HAVE_MAP_POPULATE)
/*
* Linux MAP_POPULATE reads ahead and wires pages.
* (MAP_POPULATE | MAP_NONBLOCK) wires only resident pages
* without read ahead but it does not work since Linux 2.6.23.
*/
#define NXT_MEM_MAP_PREFAULT MAP_POPULATE
#elif (NXT_HAVE_MAP_PREFAULT_READ)
/* FreeBSD MAP_PREFAULT_READ wires resident pages without read ahead. */
#define NXT_MEM_MAP_PREFAULT MAP_PREFAULT_READ
#else
#define NXT_MEM_MAP_PREFAULT 0
#endif
#define NXT_MEM_MAP_FILE (MAP_SHARED | NXT_MEM_MAP_PREFAULT)
#define \
nxt_mem_map_file_ctx_t(ctx)
#define \
nxt_mem_map(addr, ctx, len, protection, flags, fd, offset) \
nxt_mem_mmap(addr, len, protection, flags, fd, offset)
#define \
nxt_mem_unmap(addr, ctx, len) \
nxt_mem_munmap(addr, len)
NXT_EXPORT void *nxt_mem_mmap(void *addr, size_t len, nxt_uint_t protection,
nxt_uint_t flags, nxt_fd_t fd, nxt_off_t offset);
NXT_EXPORT void nxt_mem_munmap(void *addr, size_t len);
#endif /* _NXT_UNIX_MEM_MAP_H_INCLUDED_ */
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