diff options
Diffstat (limited to 'vm/memory_object.c')
| -rw-r--r-- | vm/memory_object.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/vm/memory_object.c b/vm/memory_object.c index e281c6a3..57c42cd5 100644 --- a/vm/memory_object.c +++ b/vm/memory_object.c @@ -1037,6 +1037,53 @@ kern_return_t memory_object_get_attributes(object, object_ready, return(KERN_SUCCESS); } +kern_return_t +memory_object_set_advice(object, advice) + vm_object_t object; + vm_advice_t advice; +{ + if (object == VM_OBJECT_NULL) + return(KERN_INVALID_ARGUMENT); + + switch(advice) { + case VM_ADVICE_DEFAULT: + case VM_ADVICE_RANDOM: + case VM_ADVICE_SEQUENTIAL: + case VM_ADVICE_NORMAL: + case VM_ADVICE_KEEP: + break; + default: + vm_object_deallocate(object); + return(KERN_INVALID_ARGUMENT); + } + + vm_object_lock(object); + if (advice != VM_ADVICE_KEEP) + object->advice = advice; + vm_object_unlock(object); + + vm_object_deallocate(object); + + return(KERN_SUCCESS); +} + +kern_return_t +memory_object_get_advice(object, advice) + vm_object_t object; + vm_advice_t *advice; +{ + if (object == VM_OBJECT_NULL) + return(KERN_INVALID_ARGUMENT); + + vm_object_lock(object); + *advice = object->advice; + vm_object_unlock(object); + + vm_object_deallocate(object); + + return(KERN_SUCCESS); +} + /* * If successful, consumes the supplied naked send right. */ |