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4bab02240e
Fallback using mlock is provided if the flags argument is zero. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Memory-mapping-related declarations/definitions, not architecture-specific.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_MMAN_H
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# error "Never use <bits/mman-shared.h> directly; include <sys/mman.h> instead."
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#endif
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#ifdef __USE_GNU
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/* Flags for memfd_create. */
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# ifndef MFD_CLOEXEC
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# define MFD_CLOEXEC 1U
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# define MFD_ALLOW_SEALING 2U
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# define MFD_HUGETLB 4U
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# endif
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/* Flags for mlock2. */
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# ifndef MLOCK_ONFAULT
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# define MLOCK_ONFAULT 1U
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# endif
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__BEGIN_DECLS
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/* Create a new memory file descriptor. NAME is a name for debugging.
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FLAGS is a combination of the MFD_* constants. */
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int memfd_create (const char *__name, unsigned int __flags) __THROW;
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/* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
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memory. FLAGS is a combination of the MLOCK_* flags above. */
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int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW;
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__END_DECLS
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#endif /* __USE_GNU */
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