1 files changed, 49 insertions, 0 deletions
diff --git a/src/common/workqueue.h b/src/common/workqueue.h
new file mode 100644
index 0000000000..89282e6f21
--- /dev/null
+++ b/src/common/workqueue.h
@@ -0,0 +1,49 @@
+/* Copyright (c) 2013-2016, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_WORKQUEUE_H
+#define TOR_WORKQUEUE_H
+
+#include "compat.h"
+
+/** A replyqueue is used to tell the main thread about the outcome of
+ * work that we queued for the the workers. */
+typedef struct replyqueue_s replyqueue_t;
+/** A thread-pool manages starting threads and passing work to them. */
+typedef struct threadpool_s threadpool_t;
+/** A workqueue entry represents a request that has been passed to a thread
+ * pool. */
+typedef struct workqueue_entry_s workqueue_entry_t;
+
+/** Possible return value from a work function: */
+typedef enum {
+  WQ_RPL_REPLY = 0, /** indicates success */
+  WQ_RPL_ERROR = 1, /** indicates fatal error */
+  WQ_RPL_SHUTDOWN = 2, /** indicates thread is shutting down */
+} workqueue_reply_t;
+
+workqueue_entry_t *threadpool_queue_work(threadpool_t *pool,
+                                         workqueue_reply_t (*fn)(void *,
+                                                                 void *),
+                                         void (*reply_fn)(void *),
+                                         void *arg);
+
+int threadpool_queue_update(threadpool_t *pool,
+                            void *(*dup_fn)(void *),
+                            workqueue_reply_t (*fn)(void *, void *),
+                            void (*free_fn)(void *),
+                            void *arg);
+void *workqueue_entry_cancel(workqueue_entry_t *pending_work);
+threadpool_t *threadpool_new(int n_threads,
+                             replyqueue_t *replyqueue,
+                             void *(*new_thread_state_fn)(void*),
+                             void (*free_thread_state_fn)(void*),
+                             void *arg);
+replyqueue_t *threadpool_get_replyqueue(threadpool_t *tp);
+
+replyqueue_t *replyqueue_new(uint32_t alertsocks_flags);
+tor_socket_t replyqueue_get_socket(replyqueue_t *rq);
+void replyqueue_process(replyqueue_t *queue);
+
+#endif
+