base: refactor process class (specifically FdMap and friends)

This patch extends the previous patch's alterations around fd_map.  It cleans
up some of the uglier code in the process file and replaces it with a more
concise C++11 version.  As part of the changes, the FdMap class is pulled out
of the Process class and receives its own file.

1 files changed, 91 insertions, 0 deletions

diff --git a/src/sim/fd_entry.cc b/src/sim/fd_entry.cc
new file mode 100644
index 000000000..72975a7a6
--- /dev/null
+++ b/src/sim/fd_entry.cc
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2015 Advanced Micro Devices, Inc.
+ * Copyright (c) 2001-2005 The Regents of The University of Michigan
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Nathan Binkert
+ *          Steve Reinhardt
+ */
+
+#include "base/misc.hh"
+#include "fd_entry.hh"
+
+using namespace std;
+
+void
+FDEntry::serialize(CheckpointOut &cp) const
+{
+    SERIALIZE_SCALAR(fd);
+    if (fd != -1) {
+        SERIALIZE_SCALAR(mode);
+        SERIALIZE_SCALAR(flags);
+        SERIALIZE_SCALAR(isPipe);
+        SERIALIZE_SCALAR(readPipeSource);
+        SERIALIZE_SCALAR(fileOffset);
+        SERIALIZE_SCALAR(filename);
+    }
+    if (driver)
+        warn("EmulatedDriver objects do not currently support checkpoints");
+}
+
+void
+FDEntry::unserialize(CheckpointIn &cp)
+{
+    UNSERIALIZE_SCALAR(fd);
+    if (fd != -1) {
+        UNSERIALIZE_SCALAR(mode);
+        UNSERIALIZE_SCALAR(flags);
+        UNSERIALIZE_SCALAR(isPipe);
+        UNSERIALIZE_SCALAR(readPipeSource);
+        UNSERIALIZE_SCALAR(fileOffset);
+        UNSERIALIZE_SCALAR(filename);
+    }
+    driver = NULL;
+}
+
+bool
+FDEntry::isFree()
+{
+    return (fd == -1 && driver == NULL);
+}
+
+void
+FDEntry::set(int sim_fd, const string name, int flags, int mode, bool pipe)
+{
+    fd = sim_fd;
+    filename = name;
+    this->flags = flags;
+    this->mode = mode;
+    isPipe = pipe;
+    fileOffset = 0;
+    readPipeSource = 0;
+    driver = NULL;
+}
+
+void
+FDEntry::reset()
+{
+    set(-1, "", 0, 0, false);
+}