Constructs a virtual memory handle for mapping a virtual memory object with a specified access level.
#include <sys/types.h> #include <sys/errno.h> #include <sys/vmuser.h>
vmhandle_t vm_handle (vmid, key) vmid_t vmid; int key;
| vmid | Specifies a virtual memory object identifier, as returned by the vms_create kernel service. |
| key | Specifies an access key. This parameter has a 1 value for limited access and a 0 value for unlimited access, respectively. |
The vm_handle kernel service constructs a virtual memory handle for use by the vm_att kernel service. The handle identifies the virtual memory object specified by the vmid parameter and contains the access key specified by the key parameter.
A virtual memory handle is used with the vm_att kernel service to map a virtual memory object into the current address space.
The vm_handle kernel service assumes an address space model of fixed-size virtual memory objects and address space regions.
The vm_handle kernel service can be called from the process environment only.
The vm_handle kernel service returns a virtual memory handle type.
The vm_handle kernel service is part of Base Operating System (BOS) Runtime.
The vm_att kernel service, vms_create kernel service.
Memory Kernel Services and Understanding Virtual Memory Manager Interfaces in AIX Kernel Extensions and Device Support Programming Concepts.