From 8817e547e524cd81b5176cf277ef611920b0815a Mon Sep 17 00:00:00 2001
From: Gabe Black <gabeblack@google.com>
Date: Tue, 11 Sep 2018 21:46:12 -0700
Subject: systemc: Implement sc_buffer.

This required a small change to sc_signal so that the value change
event and the change stamp for it were accessible.

Change-Id: Ife0545d84f3b25e98da079786c30ffa51025cce7
Reviewed-on: https://gem5-review.googlesource.com/c/12804
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
---
 src/systemc/ext/channel/sc_buffer.hh | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

(limited to 'src/systemc/ext/channel/sc_buffer.hh')

diff --git a/src/systemc/ext/channel/sc_buffer.hh b/src/systemc/ext/channel/sc_buffer.hh
index 22081605e..21dc52be0 100644
--- a/src/systemc/ext/channel/sc_buffer.hh
+++ b/src/systemc/ext/channel/sc_buffer.hh
@@ -32,7 +32,6 @@
 
 #include "../core/sc_module.hh" // for sc_gen_unique_name
 #include "sc_signal.hh"
-#include "warn_unimpl.hh" // for warn_unimpl
 
 namespace sc_core
 {
@@ -49,27 +48,28 @@ class sc_buffer : public sc_signal<T, WRITER_POLICY>
     {}
 
     virtual void
-    write(const T&)
+    write(const T &t)
     {
-        sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
+        this->m_new_val = t;
+        this->request_update();
     }
 
     sc_buffer<T, WRITER_POLICY> &
-    operator = (const T &)
+    operator = (const T &arg)
     {
-        sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
+        write(arg);
         return *this;
     }
     sc_buffer<T, WRITER_POLICY> &
-    operator = (const sc_signal<T, WRITER_POLICY> &)
+    operator = (const sc_signal<T, WRITER_POLICY> &arg)
     {
-        sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
+        write(arg.read());
         return *this;
     }
     sc_buffer<T, WRITER_POLICY> &
-    operator = (const sc_buffer<T, WRITER_POLICY> &)
+    operator = (const sc_buffer<T, WRITER_POLICY> &arg)
     {
-        sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
+        write(arg.read());
         return *this;
     }
 
@@ -79,7 +79,8 @@ class sc_buffer : public sc_signal<T, WRITER_POLICY>
     virtual void
     update()
     {
-        sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
+        this->m_cur_val = this->m_new_val;
+        this->_signalChange();
     }
 
   private:
-- 
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