[gtk-vnc] Initialize gcrypt threading callbacks

[Daniel P. Berrange <dberrange src gnome org>]

commit 90225c7981ae7a1586e6dbf136ba34b0e1ec8cae
Author: Daniel P. Berrange <berrange redhat com>
Date:   Thu Dec 17 18:23:19 2009 +0000

    Initialize gcrypt threading callbacks
    
    If GTK has threading enabled, we must be sure to enable gcrypt
    threading callbacks too for safety

 src/gvnc.c |   46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 46 insertions(+), 0 deletions(-)
---
diff --git a/src/gvnc.c b/src/gvnc.c
index 307bbfe..c42fd6e 100644
--- a/src/gvnc.c
+++ b/src/gvnc.c
@@ -781,6 +781,47 @@ static void gvnc_debug_gnutls_log(int level, const char* str) {
 }
 #endif
 
+
+static int gvnc_tls_mutex_init (void **priv)
+{                                                                             \
+    GMutex *lock = NULL;
+    lock = g_mutex_new();
+    *priv = lock;
+    return 0;
+}
+
+static int gvnc_tls_mutex_destroy(void **priv)
+{
+    GMutex *lock = *priv;
+    g_mutex_free(lock);
+    return 0;
+}
+
+static int gvnc_tls_mutex_lock(void **priv)
+{
+    GMutex *lock = *priv;
+    g_mutex_lock(lock);
+    return 0;
+}
+
+static int gvnc_tls_mutex_unlock(void **priv)
+{
+    GMutex *lock = *priv;
+    g_mutex_unlock(lock);
+    return 0;
+}
+
+static struct gcry_thread_cbs gvnc_thread_impl = {
+    (GCRY_THREAD_OPTION_PTHREAD | (GCRY_THREAD_OPTION_VERSION << 8)),
+    NULL,
+    gvnc_tls_mutex_init,
+    gvnc_tls_mutex_destroy,
+    gvnc_tls_mutex_lock,
+    gvnc_tls_mutex_unlock,
+    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+
+
 static gboolean gvnc_tls_initialize(void)
 {
 	static int tlsinitialized = 0;
@@ -788,6 +829,11 @@ static gboolean gvnc_tls_initialize(void)
 	if (tlsinitialized)
 		return TRUE;
 
+	if (g_thread_supported()) {
+		gcry_control(GCRYCTL_SET_THREAD_CBS, &gvnc_thread_impl);
+		gcry_check_version(NULL);
+	}
+
 	if (gnutls_global_init () < 0)
 		return FALSE;