curl: Initial codedrop of curl-7.21.3.tar.gz
URL: http://curl.haxx.se/download/curl-7.21.3.tar.gz
diff --git a/curl-7.21.3/docs/examples/opensslthreadlock.c b/curl-7.21.3/docs/examples/opensslthreadlock.c
new file mode 100644
index 0000000..706e901
--- /dev/null
+++ b/curl-7.21.3/docs/examples/opensslthreadlock.c
@@ -0,0 +1,81 @@
+/*****************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ *
+ * Example source code to show one way to set the necessary OpenSSL locking
+ * callbacks if you want to do multi-threaded transfers with HTTPS/FTPS with
+ * libcurl built to use OpenSSL.
+ *
+ * This is not a complete stand-alone example.
+ *
+ * Author: Jeremy Brown
+ */
+
+
+#include <stdio.h>
+#include <pthread.h>
+#include <openssl/err.h>
+
+#define MUTEX_TYPE pthread_mutex_t
+#define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
+#define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
+#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
+#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
+#define THREAD_ID pthread_self( )
+
+
+void handle_error(const char *file, int lineno, const char *msg){
+ fprintf(stderr, "** %s:%d %s\n", file, lineno, msg);
+ ERR_print_errors_fp(stderr);
+ /* exit(-1); */
+ }
+
+/* This array will store all of the mutexes available to OpenSSL. */
+static MUTEX_TYPE *mutex_buf= NULL;
+
+
+static void locking_function(int mode, int n, const char * file, int line)
+{
+ if (mode & CRYPTO_LOCK)
+ MUTEX_LOCK(mutex_buf[n]);
+ else
+ MUTEX_UNLOCK(mutex_buf[n]);
+}
+
+static unsigned long id_function(void)
+{
+ return ((unsigned long)THREAD_ID);
+}
+
+int thread_setup(void)
+{
+ int i;
+
+ mutex_buf = malloc(CRYPTO_num_locks( ) * sizeof(MUTEX_TYPE));
+ if (!mutex_buf)
+ return 0;
+ for (i = 0; i < CRYPTO_num_locks( ); i++)
+ MUTEX_SETUP(mutex_buf[i]);
+ CRYPTO_set_id_callback(id_function);
+ CRYPTO_set_locking_callback(locking_function);
+ return 1;
+}
+
+int thread_cleanup(void)
+{
+ int i;
+
+ if (!mutex_buf)
+ return 0;
+ CRYPTO_set_id_callback(NULL);
+ CRYPTO_set_locking_callback(NULL);
+ for (i = 0; i < CRYPTO_num_locks( ); i++)
+ MUTEX_CLEANUP(mutex_buf[i]);
+ free(mutex_buf);
+ mutex_buf = NULL;
+ return 1;
+}