Are all bits clear in the bitmap?

Are all bits set in the bitmap?

Bitwise And with another bitmap, the two bitmap must be same size

This function is rarely used, so don't add another function pointer to reduce performance of most common case.

Clear all bits of the bitmap

Make the compile check misuse Thread as BaseThread Note the prototype is different with BaseThread::Entry

For one key, find the minimal block that the key would probably in it.

Return whether should exit. Note even if return false, the task may be not empty because of remaining tasks before exit was set.

insert one byte

Left shift all bits, fill 0 to the hollow

This function can't be in binary_version.cpp, otherwise, compiler optmizer will use kSvnInfoCount as 0 at compile time. and then generate empty versio