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curl_global_init(3)                            libcurl Manual                            curl_global_init(3)



NAME
       curl_global_init - Global libcurl initialisation

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_global_init(long flags);

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

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

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

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

       See  the  description in libcurl(3) of global environment requirements for details of how to use this
       function.


FLAGS
       CURL_GLOBAL_ALL
            Initialize everything possible. This sets all known bits except CURL_GLOBAL_ACK_EINTR.

       CURL_GLOBAL_SSL
            Initialize SSL

       CURL_GLOBAL_WIN32
            Initialize the Win32 socket libraries.

       CURL_GLOBAL_NOTHING
            Initialise nothing extra. This sets no bit.

       CURL_GLOBAL_DEFAULT
            A sensible default. It will init both SSL and Win32. Right now, this equals the functionality of
            the CURL_GLOBAL_ALL mask.

       CURL_GLOBAL_ACK_EINTR
            When this flag is set, curl will acknowledge EINTR condition when connecting or when waiting for
            data.  Otherwise, curl waits until full timeout elapses.

RETURN VALUE
       If this function returns non-zero, something went wrong and you cannot use the other curl  functions.

SEE ALSO
       curl_global_init_mem(3), curl_global_cleanup(3), curl_easy_init (3) libcurl (3)



libcurl 7.12                                     11 May 2004                             curl_global_init(3)