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Implement the mlock2 function

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Fallback using mlock is provided if the flags argument is zero.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2017-11-27 17:14:29 +01:00
parent a23aa5b727
commit 4bab02240e
37 changed files with 194 additions and 5 deletions
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9
sysdeps/unix/sysv/linux/bits/mman-shared.h
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@ -28,12 +28,21 @@
# define MFD_HUGETLB 4U
# endif
/* Flags for mlock2. */
# ifndef MLOCK_ONFAULT
# define MLOCK_ONFAULT 1U
# endif
__BEGIN_DECLS
/* Create a new memory file descriptor. NAME is a name for debugging.
FLAGS is a combination of the MFD_* constants. */
int memfd_create (const char *__name, unsigned int __flags) __THROW;
/* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
memory. FLAGS is a combination of the MLOCK_* flags above. */
int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW;
__END_DECLS
#endif /* __USE_GNU */