mem: Remove unused 'using namespace'

Removal of unused/barely used 'using namespace' from C++ files.

Change-Id: I66dc548c04506db2e41180b9ea7ab5abd7d5375a
Reviewed-on: https://gem5-review.googlesource.com/9601
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>

7 files changed, 3 insertions, 18 deletions

diff --git a/src/mem/cache/mshr.cc b/src/mem/cache/mshr.cc
index 493b7f021..cc26b5651 100644
--- a/src/mem/cache/mshr.cc
+++ b/src/mem/cache/mshr.cc
@@ -60,8 +60,6 @@
 #include "mem/cache/cache.hh"
 #include "sim/core.hh"
 
-using namespace std;
-
 MSHR::MSHR() : downstreamPending(false),
                pendingModified(false),
                postInvalidate(false), postDowngrade(false),
@@ -617,7 +615,7 @@ MSHR::print(std::ostream &os, int verbosity, const std::string &prefix) const
 std::string
 MSHR::print() const
 {
-    ostringstream str;
+    std::ostringstream str;
     print(str);
     return str.str();
 }
diff --git a/src/mem/cache/mshr_queue.cc b/src/mem/cache/mshr_queue.cc
index f4992e176..29358d737 100644
--- a/src/mem/cache/mshr_queue.cc
+++ b/src/mem/cache/mshr_queue.cc
@@ -47,8 +47,6 @@
 
 #include "mem/cache/mshr_queue.hh"
 
-using namespace std;
-
 MSHRQueue::MSHRQueue(const std::string &_label,
                      int num_entries, int reserve, int demand_reserve)
     : Queue<MSHR>(_label, num_entries, reserve),
diff --git a/src/mem/cache/tags/base.cc b/src/mem/cache/tags/base.cc
index d467019f6..d48acfbe1 100644
--- a/src/mem/cache/tags/base.cc
+++ b/src/mem/cache/tags/base.cc
@@ -52,8 +52,6 @@
 #include "mem/cache/base.hh"
 #include "sim/sim_exit.hh"
 
-using namespace std;
-
 BaseTags::BaseTags(const Params *p)
     : ClockedObject(p), blkSize(p->block_size), blkMask(blkSize - 1),
       size(p->size),
diff --git a/src/mem/cache/tags/base_set_assoc.cc b/src/mem/cache/tags/base_set_assoc.cc
index 0ab806ee9..ac0e06f95 100644
--- a/src/mem/cache/tags/base_set_assoc.cc
+++ b/src/mem/cache/tags/base_set_assoc.cc
@@ -52,8 +52,6 @@
 #include "base/intmath.hh"
 #include "sim/core.hh"
 
-using namespace std;
-
 BaseSetAssoc::BaseSetAssoc(const Params *p)
     :BaseTags(p), assoc(p->assoc), allocAssoc(p->assoc),
      blks(p->size / p->block_size),
diff --git a/src/mem/cache/tags/fa_lru.cc b/src/mem/cache/tags/fa_lru.cc
index 652abc360..f02b55a8d 100644
--- a/src/mem/cache/tags/fa_lru.cc
+++ b/src/mem/cache/tags/fa_lru.cc
@@ -53,8 +53,6 @@
 #include "base/intmath.hh"
 #include "base/logging.hh"
 
-using namespace std;
-
 FALRU::FALRU(const Params *p)
     : BaseTags(p), cacheBoundaries(nullptr)
 {
@@ -122,7 +120,6 @@ FALRU::~FALRU()
 void
 FALRU::regStats()
 {
-    using namespace Stats;
     BaseTags::regStats();
     hits
         .init(numCaches+1)
@@ -140,7 +137,7 @@ FALRU::regStats()
         ;
 
     for (unsigned i = 0; i <= numCaches; ++i) {
-        stringstream size_str;
+        std::stringstream size_str;
         if (i < 3){
             size_str << (1<<(i+7)) <<"K";
         } else {
diff --git a/src/mem/cache/write_queue.cc b/src/mem/cache/write_queue.cc
index 7a876b326..13e0fc519 100644
--- a/src/mem/cache/write_queue.cc
+++ b/src/mem/cache/write_queue.cc
@@ -48,8 +48,6 @@
 
 #include "mem/cache/write_queue.hh"
 
-using namespace std;
-
 WriteQueue::WriteQueue(const std::string &_label,
                        int num_entries, int reserve)
     : Queue<WriteQueueEntry>(_label, num_entries, reserve)
diff --git a/src/mem/cache/write_queue_entry.cc b/src/mem/cache/write_queue_entry.cc
index 663c231fa..b8275e13e 100644
--- a/src/mem/cache/write_queue_entry.cc
+++ b/src/mem/cache/write_queue_entry.cc
@@ -61,8 +61,6 @@
 #include "mem/cache/cache.hh"
 #include "sim/core.hh"
 
-using namespace std;
-
 inline void
 WriteQueueEntry::TargetList::add(PacketPtr pkt, Tick readyTime,
                                  Counter order)
@@ -163,7 +161,7 @@ WriteQueueEntry::print(std::ostream &os, int verbosity,
 std::string
 WriteQueueEntry::print() const
 {
-    ostringstream str;
+    std::ostringstream str;
     print(str);
     return str.str();
 }