Hello,

You only need to call the openssl_crypto_init_locks mentioned above once at
the beginning of your program.

Met vriendelijke groet / Best regards / Mit freundlichen Grüßen,

Johan de Vries
*Software Developer*

*IXON*

Vierlingsbeekseweg 52 A

5825 AX Overloon

the Netherlands

*T* +31 (0)85 744 1105

*E* devries_at_ixon.co <devries%E2%80%8B_at_ixon.net>

*I* www.ixon.co

2016-11-25 10:50 GMT+01:00 mao mao <lmjrd_at_hotmail.com>:

> Thankyou Thomas and Johan both
>
>
> to Johan: how to use these two functions
>
> openssl_crypto_locking_callback
> openssl_crypto_init_locks
> when start new thread using _beginthreadex or createthread or
> afxbeginthread?
>
> ------------------------------
> *发件人:* curl-library <curl-library-bounces_at_cool.haxx.se> 代表 Johan de Vries
> <devries_at_ixon.co>
> *发送时间:* 2016年11月24日 23:21:33
> *收件人:* libcurl development
> *主题:* Re: SSL and multithread crash on windows, how to use mutex on
> windows?
>
> Using boost:
>
> #include <boost/ptr_container/ptr_vector.hpp>
> #include <openssl/crypto.h>
>
> #define OPENSSL_THREAD_DEFINES
> #include <openssl/opensslconf.h>
> #if !defined(OPENSSL_THREADS)
> #error OpenSSL needs to be compiled with thread support
> #endif
>
> boost::ptr_vector<boost::mutex> openssl_lock_list;
>
> void openssl_crypto_locking_callback(
> int mode, int type, const char * const, int
> ) {
> if( mode & CRYPTO_LOCK ) {
> openssl_lock_list[type].lock();
> } else {
> openssl_lock_list[type].unlock();
> }
> }
>
> void openssl_crypto_init_locks()
> {
> for(int i = 0; i < CRYPTO_num_locks(); ++i) {
> openssl_lock_list.push_back(new boost::mutex());
> }
>
> // Not neccessary according to docs, and boost can't really give a
> pointer or
> // integer ID of a thread
> // CRYPTO_THREADID_set_callback(openssl_crypto_threadid_callback);
> CRYPTO_set_locking_callback(openssl_crypto_locking_callback);
> }
>
>
>
> Met vriendelijke groet / Best regards / Mit freundlichen Grüßen,
>
> Johan de Vries
> *Software Developer*
>
>
>
>
> *IXON*
>
> Vierlingsbeekseweg 52 A
>
> 5825 AX Overloon
>
> the Netherlands
>
>
>
> *T* +31 (0)85 744 1105
>
> *E* devries_at_ixon.co <devries%E2%80%8B_at_ixon.net>
>
> *I* www.ixon.co
>
> 2016-11-25 7:25 GMT+01:00 Thomas Glanzmann <thomas_at_glanzmann.de>:
>
>> Hello,
>>
>> > SSL and multithread crash on windows, how to use mutex on windows?
>>
>> Best way is you post a striped down example which crashes.
>>
>> For me the following works, without a problem.
>>
>> Once:
>> curl_global_init(CURL_GLOBAL_DEFAULT);
>>
>> For each thread:
>> _beginthread(...);
>> share = curl_share_init();
>> curl_share_setopt(share, CURLSHOPT_SHARE,
>> CURL_LOCK_DATA_SSL_SESSION);
>> curl = curl_easy_init();
>> curl_easy_setopt(curl, CURLOPT_SHARE, share);
>> curl_easy_setopt(curl, CURLOPT_URL, "https://google.com");
>> curl_easy_perform(curl);
>> curl_easy_cleanup(curl);
>>
>> Cheers,
>> Thomas
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>
>
>
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Received on 2016-11-25