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vslock ()
  • >> vslock (9) ( FreeBSD man: Ядро )

  • BSD mandoc
     

    NAME

    
    
    vslock
    
     
    vsunlock
    
     - lock/unlock user space addresses in memory
    
     
    

    SYNOPSIS

       #include <sys/param.h>
       #include <sys/proc.h>
       #include <vm/vm.h>
       #include <vm/vm_extern.h>
    int vslock (void *addr size_t len);
    void vsunlock (void *addr size_t len);
     

    DESCRIPTION

    The vslock ();
    and vsunlock ();
    functions respectively lock and unlock a range of addresses belonging to the currently running process into memory. The actual amount of memory locked is a multiple of the machine's page size. The starting page number is computed by truncating Fa addr to the nearest preceding page boundary, and by rounding up Fa addr + Fa len to the next page boundary. The process context to use for this operation is taken from the global variable curproc  

    RETURN VALUES

    The vslock ();
    function will return 0 on success, otherwise it will return one of the errors listed below.  

    ERRORS

    The vslock ();
    function will fail if:

    Bq Er EINVAL
    The Fa addr and Fa len parameters specify a memory range that wraps around the end of the machine address space.
    Bq Er ENOMEM
    The size of the specified address range exceeds the system limit on locked memory.
    Bq Er ENOMEM
    Locking the requested address range would cause the process to exceed its per-process locked memory limit.
    Bq Er EFAULT
    Some portion of the indicated address range is not allocated. There was an error faulting/mapping a page.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS


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