Log statistics about the current cache state

Pipe Reader Thread: Process Client

Init

Shutdown

Setup the service (from main)

Cleanup thread management

Blocking

NOTE: This code came up with the following stackoverflow post: https://stackoverflow.com/questions/180947/base64-decode-snippet-in-c

Assumes that socket_mutex_ is locked and that there are no requests in flight

deep copy from another JsonW

@brief returns a const reverse iterator to the last element @sa https://json.nlohmann.me/api/basic_json/crbegin/

@brief returns a const reverse iterator to one before the first @sa https://json.nlohmann.me/api/basic_json/crend/

Returns the maximum of g_stderr_verbosity and all file/custom outputs.

! @brief dump a floating-point number Dump a given floating-point number to output stream @a o. Works internally with @a numb

! For n != 0, returns k, such that pow10 := 10^(k-1) <= n < 10^k. For n == 0, returns 1 and sets pow10 := 1. */

! For a normalized diyfp w = f * 2^e, this function returns a (normalized) cached power-of-ten c = f_c * 2^e_c, such that the exponent

Returns Verbosity_INVALID if the name is not found. See also set_name_to_verbosity_callback.

Returns a custom verbosity name if one is available, or nullptr. See also set_verbosity_to_name_callback.

! Generates V = buffer * 10^decimal_exponent, such that M- <= V <= M+. M- and M+ must be normalized and share the same exponent -60 <=

private help function, read json data from wistream