diff options
Diffstat (limited to 'erts/emulator/sys/common/erl_mmap.h')
| -rw-r--r-- | erts/emulator/sys/common/erl_mmap.h | 89 |
1 files changed, 87 insertions, 2 deletions
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h index 64baa6c493..143f1aff3e 100644 --- a/erts/emulator/sys/common/erl_mmap.h +++ b/erts/emulator/sys/common/erl_mmap.h @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2002-2013. All Rights Reserved. + * Copyright Ericsson AB 2013. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -17,10 +17,95 @@ * %CopyrightEnd% */ +#ifndef ERL_MMAP_H__ +#define ERL_MMAP_H__ + +#include "sys.h" + +#define ERTS_MMAP_SUPERALIGNED_BITS (18) +/* Affects hard limits for sbct and lmbcs documented in erts_alloc.xml */ + +#define ERTS_MMAPFLG_OS_ONLY (((Uint32) 1) << 0) +#define ERTS_MMAPFLG_SUPERCARRIER_ONLY (((Uint32) 1) << 1) +#define ERTS_MMAPFLG_SUPERALIGNED (((Uint32) 1) << 2) + +#define ERTS_HAVE_ERTS_OS_MMAP (1 << 0) +#define ERTS_HAVE_ERTS_SUPERCARRIER_MMAP (1 << 1) +extern int erts_have_erts_mmap; +extern UWord erts_page_inv_mask; + typedef struct { - SWord scs; /* super carrier size */ + struct { + char *start; + char *end; + } virtual_range; + struct { + char *start; + char *end; + } predefined_area; + UWord scs; /* super carrier size */ int sco; /* super carrier only? */ Uint scmgc; /* super carrier: max guaranteed (number of) carriers */ + int scrpm; }ErtsMMapInit; +#define ERTS_MMAP_INIT_DEFAULT_INITER \ + {{NULL, NULL}, {NULL, NULL}, 0, 1, (1 << 16), 1} + +void *erts_mmap(Uint32 flags, UWord *sizep); +void erts_munmap(Uint32 flags, void **ptrp, UWord *sizep); +void *erts_mremap(Uint32 flags, void *ptr, UWord old_size, UWord *sizep); +int erts_mmap_in_supercarrier(void *ptr); void erts_mmap_init(ErtsMMapInit*); + +#define ERTS_SUPERALIGNED_SIZE \ + (1 << ERTS_MMAP_SUPERALIGNED_BITS) +#define ERTS_INV_SUPERALIGNED_MASK \ + ((UWord) (ERTS_SUPERALIGNED_SIZE - 1)) +#define ERTS_SUPERALIGNED_MASK \ + (~ERTS_INV_SUPERALIGNED_MASK) +#define ERTS_SUPERALIGNED_FLOOR(X) \ + (((UWord) (X)) & ERTS_SUPERALIGNED_MASK) +#define ERTS_SUPERALIGNED_CEILING(X) \ + ERTS_SUPERALIGNED_FLOOR((X) + ERTS_INV_SUPERALIGNED_MASK) +#define ERTS_IS_SUPERALIGNED(X) \ + (((UWord) (X) & ERTS_INV_SUPERALIGNED_MASK) == 0) + +#define ERTS_INV_PAGEALIGNED_MASK \ + (erts_page_inv_mask) +#define ERTS_PAGEALIGNED_MASK \ + (~ERTS_INV_PAGEALIGNED_MASK) +#define ERTS_PAGEALIGNED_FLOOR(X) \ + (((UWord) (X)) & ERTS_PAGEALIGNED_MASK) +#define ERTS_PAGEALIGNED_CEILING(X) \ + ERTS_PAGEALIGNED_FLOOR((X) + ERTS_INV_PAGEALIGNED_MASK) +#define ERTS_IS_PAGEALIGNED(X) \ + (((UWord) (X) & ERTS_INV_PAGEALIGNED_MASK) == 0) +#define ERTS_PAGEALIGNED_SIZE \ + (ERTS_INV_PAGEALIGNED_MASK + 1) + +#ifndef HAVE_MMAP +# define HAVE_MMAP 0 +#endif +#ifndef HAVE_MREMAP +# define HAVE_MREMAP 0 +#endif +#if HAVE_MMAP +# define ERTS_HAVE_OS_MMAP 1 +# define ERTS_HAVE_GENUINE_OS_MMAP 1 +# if HAVE_MREMAP +# define ERTS_HAVE_OS_MREMAP 1 +# endif +# if defined(MAP_FIXED) && defined(MAP_NORESERVE) +# define ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION 1 +# endif +#endif + +#ifndef HAVE_VIRTUALALLOC +# define HAVE_VIRTUALALLOC 0 +#endif +#if HAVE_VIRTUALALLOC +# define ERTS_HAVE_OS_MMAP 1 +#endif + +#endif /* ERL_MMAP_H__ */ |