module Ethon::Curl

any other thread that uses these other libraries.
functions of other libraries that are similarly thread unsafe, it could conflict with
mean no other thread that is using libcurl. Because curl_global_init() calls
the program (i.e. a thread sharing the same memory) is running. This doesn't just
This function is not thread safe. You must not call it when any other thread in

you are familiar with it and mean to control internal operations of libcurl.
operation, you must specify CURL_GLOBAL_ALL. Don't use any other value unless
as described below. Set the desired bits by ORing the values together. In normal
The flags option is a bit pattern that tells libcurl exactly what features to init,

every program, so multiple calls have the same effect as one call.
The environment it sets up is constant for the life of the program and is the same for
code that shares a memory space) before the program calls any other function in libcurl.
This function must be called at least once within a program (a program is all the

Think of it as an extension of the library loader.
This function sets up the program environment that libcurl needs.

def init
  @@init_mutex.synchronize {
    if not @@initialized
      raise RuntimeError.new('curl failed to initialise') if Curl.global_init(GLOBAL_ALL) != 0
      @@initialized = true
    end
  }
end