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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Received on 2016-11-25