New inproc transport.

Lots of supporting changes.

1 files changed, 73 insertions, 0 deletions

diff --git a/src/core/msgqueue.h b/src/core/msgqueue.h
new file mode 100644
index 00000000..9d856edd
--- /dev/null
+++ b/src/core/msgqueue.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2016 Garrett D'Amore <garrett@damore.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef CORE_MSGQUEUE_H
+#define CORE_MSGQUEUE_H
+
+#include "nng.h"
+
+/*
+ * Message queues.  Message queues work in some ways like Go channels;
+ * they are a thread-safe way to pass messages between subsystems.
+ */
+typedef struct nni_msgqueue *nni_msgqueue_t;
+
+/*
+ * nni_msgqueue_create creates a message queue with the given capacity,
+ * which must be a positive number.  It returns NNG_EINVAL if the capacity
+ * is invalid, or NNG_ENOMEM if resources cannot be allocated.
+ */
+extern int nni_msgqueue_create(nni_msgqueue_t *, int);
+
+/*
+ * nni_msgqueue_destroy destroys a message queue.  It will also free any
+ * messages that may be in the queue.
+ */
+extern void nni_msgqueue_destroy(nni_msgqueue_t);
+
+/*
+ * nni_msgqueue_put attempts to put a message to the queue.  It will wait
+ * for the timeout (us), if the value is positive.  If the value is negative
+ * then it will wait forever. If the value is zero, it will just check, and
+ * return immediately whether a message can be put or not.  Valid returns are
+ * NNG_ECLOSED if the queue is closed or NNG_ETIMEDOUT if the message cannot
+ * be placed after a time, or NNG_EAGAIN if the operation cannot succeed
+ * immediately and a zero timeout is specified.  Note that timeout granularity
+ * may be limited -- for example Windows systems have a millisecond resolution
+ * timeout capability.
+ */
+extern int nni_msgqueue_put(nni_msgqueue_t, nng_msg_t, int);
+
+/*
+ * nni_msgqueue_get gets the message from the queue, using a timeout just
+ * like nni_msgqueue_put.
+ */
+extern int nni_msgqueue_get(nni_msgqueue_t, nng_msg_t *, int);
+
+/*
+ * nni_msgqueue_close closes the queue.  After this all operates on the
+ * message queue will return NNG_ECLOSED.  Messages inside the queue
+ * are freed.  Unlike closing a go channel, this operation is idempotent.
+ */
+extern void nni_msgqueue_close(nni_msgqueue_t);
+
+#endif	/* CORE_MSQUEUE_H */