FreeBSD/Linux Kernel Cross Reference
sys/man/memory_object_data_unlock.man

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    .\" HISTORY
    .\" $Log:       memory_object_data_unlock.man,v $
    .\" Revision 2.5  93/05/10  19:33:44  rvb
    .\"     updated
    .\"     [93/04/21  16:08:30  lli]
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    .\" Revision 2.2  90/08/07  18:40:43  rpd
    .\"     Created.
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    .TH memory_object_data_unlock 2 12/19/89
    .CM 4
    .SH NAME
    .nf
    memory_object_data_unlock  \-  request to unlock paging object
    .SH SYNOPSIS
    .nf
    .ft B
    #include <mach.h>
    
    .nf
    .ft B
    kern_return_t memory_object_data_unlock(memory_object, memory_control,
                                offset, length, desired_access)
            mach_port_t     memory_object;
            mach_port_t
                            memory_control;
            vm_offset_t     offset;
            vm_size_t       length;
            vm_prot_t       desired_access;
    
    
    .fi
    .ft P
    .SH DESCRIPTION
    
    .B memory_object_data_unlock
    is a request that the memory manager permit at least
    the desired access to the specified data cached by the kernel.
    A call to 
    .B memory_object_lock_request
    is expected in response.
    
    .SH ARGUMENTS
    .TP 15
    .B
    .B memory_object
    The port that represents the memory object data, as 
    supplied to the kernel in a 
    .B vm_map
    call.
    .TP 15
    .B
    .B memory_control
    The request port to which a response is 
    requested.  [In the event that a memory object has been supplied 
    to more than one the kernel that has made the request.]
    .TP 15
    .B
    .B offset
    The offset within a memory object to which this call refers.
    This will be page aligned.
    .TP 15
    .B
    .B length
    The number of bytes of data, starting at 
    .B offset
   , to which this
   call refers. This will be an integral number of memory object pages.
   .TP 15
   .B
   .B desired_access
   A protection value describing the memory access modes which
   must be permitted on the specified cached data. One or more of:
   .B VM_PROT_READ, VM_PROT_WRITE
   or 
   .B VM_PROT_EXECUTE
   .
   
   .SH DIAGNOSTICS
   .TP 25
   .B KERN_SUCCESS
   Since this routine is called by the kernel, which does not
   wait for a reply message, this value is ignored.
   
   .SH SEE ALSO
   .B memory_object_lock_request,memory_object_lock_completed
   

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