From 7364acfc758a30f81aa75844f6b96b1e4e19990a Mon Sep 17 00:00:00 2001
From: Gabe Black <gabeblack@google.com>
Date: Sat, 8 Dec 2018 01:58:26 -0800
Subject: systemc: Initial import of TLM headers from Accellera.

These headers will need to be cleaned up and have some Accellera
specific quirks ironed out of them, but I'll do that in a later change
to make it clear what those changes are.

Change-Id: Ia4e08633ab552b4c616c66c9b7e2bbd78ebfe7b9
Reviewed-on: https://gem5-review.googlesource.com/c/15055
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
---
 src/systemc/ext/tlm_utils/peq_with_get.h | 94 ++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/systemc/ext/tlm_utils/peq_with_get.h

(limited to 'src/systemc/ext/tlm_utils/peq_with_get.h')

diff --git a/src/systemc/ext/tlm_utils/peq_with_get.h b/src/systemc/ext/tlm_utils/peq_with_get.h
new file mode 100644
index 000000000..5c85f25d5
--- /dev/null
+++ b/src/systemc/ext/tlm_utils/peq_with_get.h
@@ -0,0 +1,94 @@
+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+// 12-Jan-2009  John Aynsley  Bug fix. sc_time argument to notify should be const
+// 20-Mar-2009  John Aynsley  Add cancel_all() method
+
+
+#ifndef __PEQ_WITH_GET_H__
+#define __PEQ_WITH_GET_H__
+
+#include <systemc>
+//#include <tlm>
+#include <map>
+
+namespace tlm_utils {
+
+template <class PAYLOAD>
+class peq_with_get : public sc_core::sc_object
+{
+public:
+  typedef PAYLOAD transaction_type;
+  typedef std::pair<const sc_core::sc_time, transaction_type*> pair_type;
+
+public:
+  peq_with_get(const char* name) : sc_core::sc_object(name)
+  {
+  }
+
+  void notify(transaction_type& trans, const sc_core::sc_time& t)
+  {
+    m_scheduled_events.insert(pair_type(t + sc_core::sc_time_stamp(), &trans));
+    m_event.notify(t);
+  }
+
+  void notify(transaction_type& trans)
+  {
+    m_scheduled_events.insert(pair_type(sc_core::sc_time_stamp(), &trans));
+    m_event.notify(); // immediate notification
+  }
+
+  // needs to be called until it returns 0
+  transaction_type* get_next_transaction()
+  {
+    if (m_scheduled_events.empty()) {
+      return 0;
+    }
+
+    sc_core::sc_time now = sc_core::sc_time_stamp();
+    if (m_scheduled_events.begin()->first <= now) {
+      transaction_type* trans = m_scheduled_events.begin()->second;
+      m_scheduled_events.erase(m_scheduled_events.begin());
+      return trans;
+    }
+
+    m_event.notify(m_scheduled_events.begin()->first - now);
+
+    return 0;
+  }
+
+  sc_core::sc_event& get_event()
+  {
+    return m_event;
+  }
+
+  // Cancel all events from the event queue
+  void cancel_all() {
+    m_scheduled_events.clear();
+    m_event.cancel();
+  }
+
+private:
+  std::multimap<const sc_core::sc_time, transaction_type*> m_scheduled_events;
+  sc_core::sc_event m_event;
+};
+
+}
+
+#endif
-- 
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