Why volatile in double-checked locking?
volatile in turn establishes happens-before relation between reads and writes, and fixes the broken pattern. If you are looking for performance, use holder inner static class instead. Declaring the variable as volatile guarantees that all accesses to it actually read its current value from memory.
Can you double confirm?
If you’re using the word “confirm” to verify something, just use the word “confirm”. To add “double” before “confirm” is unnecessary because “confirm” already implies something is definite. If you’ve already confirmed something once, and you would like to confirm it again, you can use the word “reconfirm”.
What is double lock in multithreading?
It is typically used to reduce locking overhead when implementing “lazy initialization” in a multi-threaded environment, especially as part of the Singleton pattern. Lazy initialization avoids initializing a value until the first time it is accessed.
Is double-checked locking safe?
Since only the first access requires locking, double-checked locking is used to avoid locking overhead of subsequent accesses. However, on many languages and hardware, the design can be unsafe.
What is double-checked locking in singleton?
In double-checked locking, code checks for an existing instance of Singleton class twice with and without locking to make sure that only one instance of singleton gets created.
What is another word for double-check?
What is another word for double-check?
| crosscheck | document |
|---|---|
| substantiate | validate |
| verify | confirm |
| support | prove |
| authenticate | certify |
How do you respond to a double-check?
Tips for Double-Checking Your Test Answers
- Tip 1: Use the “mark for review” feature.
- Tip 2: Be selective and only “mark for review” the questions that you aren’t confident on.
- Tip 3: Revisit only the questions you marked for review if you tend to do worse when you second-guess yourself.
Is double-checked locking thread safe?
In multi-threaded environments, initialization is usually not thread safe, so locking is required to protect the critical section. Since only the first access requires locking, double-checked locking is used to avoid locking overhead of subsequent accesses.
How do you do a double check?
I will double-check the facts and write to them both. We will double-check to see whether these provisions are entirely satisfactory. I will double-check my recollection on one of the groups that he mentioned.
When does an unbalanced tire start to shake?
If you want a further confirmation, it’s very common for unbalanced tires to be fine up to a certain speed then start to shake, so see if it’s almost always at the same speed that the shaking starts. This isn’t always correct, but I find that 9 times out of 10, you won’t get a shake until you reach a certain speed.
Why does my car shake when I change the wheels?
If it’s not a large wobble, then it probably wasn’t caused by you replacing the wheels. My suggestion would be to get them balanced. If you want a further confirmation, it’s very common for unbalanced tires to be fine up to a certain speed then start to shake, so see if it’s almost always at the same speed that the shaking starts.
Why does my car vibrate after a tire change?
That’s a huge amount of imbalance and could point to someone not balancing the tires properly, wheel balancer out of calibration, a faulty tire, or even a tire that was not mounted correctly. Whether your car has a bad ball joint I have no idea.
Why are my new tires bouncing on the rims?
First though.. have the tyre place check that your new tyres are seated on the rims properly, as this can cause the problem your describing if they’re not. An alignment is certainly in order, considering they have been balanced (twice!)
Why does my car shake after a tire change?
Shaking in the floor and pedals often point to a rear tire problem and is this bad ball joint on the rear of the car? A bad ball joint should definitely be replaced but the concern also would be this tire being .5 ounce out of balance.
What causes a vibration when you put on new tires?
Immediately after the new tires go on, I notice a vibration from the steering wheel at highway speed, above 60 mph. I took the car back to the tire shop (an independent tire shop, not a chain) and asked them to rebalance the tires. They did, and I took the car home. Drive to work the next day, vibration is worse.
What makes a truck shake at 50 mph?
Doing a high speed on the vehicle balance will also balance the tire and wheel assembly with the hub and rotating assembly, such as brake rotors, drums, and drive axles, which will be further amplified by the larger wheels.
What should I do if my truck is shaking?
The tires have 20 inches and the truck is shaking even worse when I took it from the dealership. What should I do? Due to the size and weight of 20 inch wheels, you may need to have the tire and wheel assemblies balanced on the vehicle.