Castor oil is a vegetable oil derived from the castor bean seed in its purest form. It is colorless, odorless and tasteless.
Encoding globally available pointers helps protect them from being exploited. The EncodePointer function obfuscates the pointer value with a secret so that it cannot be predicted by an external agent. The secret used by EncodePointer is different for each process. A pointer must be decoded before it can be used.
5.3. One of the best things about pointers is that they allow functions to alter variables outside of there own scope. By passing a pointer to a function you can allow that function to read and write to the data stored in that variable.Say you want to write a function that swaps the values of two variables.Without pointers this would be practically impossible, here's how you do it with pointers:As you can see, the function declaration of swap_ints() tells GCC to expect two pointers (address of variables). Also, the address-of operator (&) is used to pass the address of the two variables rather than their values.ithout pointers this would be practically impossible, here's how you do it with pointers: As you can see, the function declaration of swap_ints() tells GCC to expect two pointers (address of variables). Also, the address-of operator (&) is used to pass the address of the two variables rather than their values.