NAME

       pmem2_config_set_protection() - set a protection flags in pmem2_config structure.

SYNOPSIS

              #include <libpmem2.h>

              struct pmem2_config;

              #define PMEM2_PROT_EXEC     (1U << 29)
              #define PMEM2_PROT_READ     (1U << 30)
              #define PMEM2_PROT_WRITE    (1U << 31)
              #define PMEM2_PROT_NONE     0

              int pmem2_config_set_protection(struct pmem2_config *cfg,
                      unsigned prot);

DESCRIPTION

       The  pmem2_config_set_protection()  function sets the protection flags which will be used for memory map‐
       ping.  The default value in pmem2_config structure is PMEM2_PROT_READ | PMEM2_PROT_WRITE.   The  argument
       describes  the  desired  memory protection of the mapping. The memory protection cannot conflict with the
       file opening-mode. *config* should be already initialized, please see pmem2_config_new(3) for details.

       It is either PROT_NONE or the bitwise OR of one or more of the following flags:

       • PMEM2_PROT_EXEC - Pages may be executed.

       • PMEM2_PROT_READ - Pages may be read.

       • PMEM2_PROT_WRITE - Pages may be written.

       • PMEM2_PROT_NONE - Pages may not be accessed.  On Windows this flag is not supported.

RETURN VALUE

       The pmem2_config_set_protection() function returns 0 on success or a negative error code on failure.

ERRORS

       The pmem2_config_set_protection() can fail with the following errors:

       • PMEM2_E_INVALID_PROT_FLAG - some or all of the provided flags are not valid.

SEE ALSO

       libpmem2(7), pmem2_config_new(3), pmem2_map_new(3) and <https://pmem.io>