Split threading-related code out of compat.c

Also, re-enable the #if'd out condition-variable code.

Work queues are going to make us hack on all of this stuff a bit more
closely, so it might not be a terrible idea to make it easier to hack.

1 files changed, 42 insertions, 0 deletions

diff --git a/src/common/compat_threads.c b/src/common/compat_threads.c
new file mode 100644
index 0000000000..84a8a21fe2
--- /dev/null
+++ b/src/common/compat_threads.c
@@ -0,0 +1,42 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2015, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "compat.h"
+#include "util.h"
+
+/** Return a newly allocated, ready-for-use mutex. */
+tor_mutex_t *
+tor_mutex_new(void)
+{
+  tor_mutex_t *m = tor_malloc_zero(sizeof(tor_mutex_t));
+  tor_mutex_init(m);
+  return m;
+}
+/** Release all storage and system resources held by <b>m</b>. */
+void
+tor_mutex_free(tor_mutex_t *m)
+{
+  if (!m)
+    return;
+  tor_mutex_uninit(m);
+  tor_free(m);
+}
+
+/** Identity of the "main" thread */
+static unsigned long main_thread_id = -1;
+
+/** Start considering the current thread to be the 'main thread'.  This has
+ * no effect on anything besides in_main_thread(). */
+void
+set_main_thread(void)
+{
+  main_thread_id = tor_get_thread_id();
+}
+/** Return true iff called from the main thread. */
+int
+in_main_thread(void)
+{
+  return main_thread_id == tor_get_thread_id();
+}