No, to all appearances the 12th Doctor acts as someone resigned to his fate.
Based on Matt Smith's performance - including the years of vacation at a time - we have every reason to believe that the 12th Doctor truly thought his life was coming to an end. This is a being to which Death has never truly been a threat before now, as he always knew there would be a regeneration and then the adventure would continue. But THIS time... this time the death would be final, and the Doctor appears to have accepted that as the truth. In true Doctor Who form, he simply wanted to get out there and see/do things before his time was up.
In fact, this is reflected in what he believed to be his final words to Clara:
DOCTOR: No. You're going to stay here. Promise me you will.
DOCTOR: I'll be keeping you safe. One last victory. Allow me that.
Give me that, my impossible girl. Thank you. And goodbye.
Apparently, the cycle reset was as much a surprise to The Doctor as it was to the audience. Up until the very moment when his cycle is reset, he appears to honestly believe that his death is imminent, with no way to escape this time:
DOCTOR: Sorry I'm a bit slow. I may not be at my best right now.
DALEK [OC]: You are dying, Doctor.
DOCTOR: Yes, I'm dying. You've been trying to kill me for centuries,
and here I am, dying of old age. If you want something done, do it
DALEK [OC]: You will die, and the Time Lords will never return.
DOCTOR: You still can't work up the courage to shoot me, can you?
You're still worried I've got something up my sleeve. Well, you knock
yourselves out, boys. I've got nothing this time.
(Flying Daleks fire at the troops on the ground, making the townsfolk
scream. Then the crack opens in the sky and golden regeneration energy
enters the Doctor's mouth. His eyes widen in surprise and his hands
begin to glow.)
DALEK [OC]: You will die now, Doctor. This is the end of you.
(The crack disappears.)
DALEK [OC]: The rules of regeneration are known. You have expended all
DOCTOR: Sorry, what did you say? Did you mention the rules? Now,
listen. Bit of advice. Tell me the truth if you think you know it. Lay
down the law if you're feeling brave. But, Daleks, never, ever tell me
DALEK [OC]: Emergency! Emergency! The Doctor is regenerating!
(The Tower clock strikes twelve. The Doctor is feeling more youthful
already, although he doesn't look it.)
DALEK [OC]: The Doctor is regenerating!
DOCTOR: Oh, look at this. Regeneration number thirteen. We're breaking
some serious science here, boys. I tell you what, it's going to be a