libcurl - curl_global_init()

cURL  libcurl  API  curl_global_init curl_global_init.3 -- man page 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. 这个函数安装libcurl所需的程序环境。可以将其认为是库加载器。即使用该函数加载库文件。 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. 在程序调用libcurl中其他函数之前，curl_global_init必须被调用一次。一旦初始化，那么在你的程序生存期内都有效。多次调用该函数的作用与一次调用一样。因此只需要调用一次。 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. 选项flags是一个位模式，用于准确地指示libcurl初始化哪些特征。正常操作，你可以设定flags=CURL_GLOBAL_ALL。除非你熟悉libcurl，否则不要使用其他值，这意味着对libcurl内部的操作。 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. 这个函数不是线程安全的。在一个程序中，当其他线程运行时，不要调用该函数。这不是仅仅意味着其他线程在使用libcurl。因为curl_global_init函数调用其他库的函数，可能同样是线程不安全的，这就会与其他使用这些库的线程冲突。 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. 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. 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) This HTML page was made with roffit.