MXS-2008 Add maxbase/poll.[h|hh]

Remove maxscale/poll_core.h

maxutils/maxbase/include/maxbase/poll.h

@@ -0,0 +1,55 @@
+#pragma once
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include <maxbase/cdefs.h>
+#include <sys/epoll.h>
+
+MXB_BEGIN_DECLS
+
+typedef enum mxb_poll_action_t
+{
+    MXB_POLL_NOP    = 0x00,
+    MXB_POLL_ACCEPT = 0x01,
+    MXB_POLL_READ   = 0x02,
+    MXB_POLL_WRITE  = 0x04,
+    MXB_POLL_HUP    = 0x08,
+    MXB_POLL_ERROR  = 0x10,
+} mxb_poll_action_t;
+
+struct MXB_POLL_DATA;
+
+typedef struct MXB_WORKER
+{
+} MXB_WORKER;
+
+/**
+ * Pointer to function that knows how to handle events for a particular
+ * MXB_POLL_DATA structure.
+ *
+ * @param data    The MXB_POLL_DATA instance that contained this function pointer.
+ * @param worker  The worker.
+ * @param events  The epoll events.
+ *
+ * @return A combination of mxb_poll_action_t enumeration values.
+ */
+// TODO: Change void* to MXS_WORKER
+typedef uint32_t (*mxb_poll_handler_t)(struct MXB_POLL_DATA* data, void* worker, uint32_t events);
+
+typedef struct MXB_POLL_DATA
+{
+    mxb_poll_handler_t handler; /*< Handler for this particular kind of mxb_poll_data. */
+    void*              owner;   /*< Owning worker. */
+} MXB_POLL_DATA;
+
+MXB_END_DECLS

maxutils/maxbase/include/maxbase/poll.hh

@@ -0,0 +1,37 @@
+#pragma once
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include <maxbase/ccdefs.hh>
+#include <maxbase/poll.h>
+
+namespace maxbase
+{
+
+class PollData : public MXB_POLL_DATA
+{
+public:
+    PollData()
+    {
+        handler = NULL;
+        owner = nullptr;
+    }
+
+    PollData(mxb_poll_handler_t h)
+    {
+        handler = h;
+        owner = nullptr;
+    }
+};
+
+}