Second Life viewer sources 1.13.2.12

1 files changed, 93 insertions, 0 deletions

diff --git a/linden/indra/llcommon/lllivefile.cpp b/linden/indra/llcommon/lllivefile.cpp
new file mode 100644
index 0000000..33e2014
--- /dev/null
+++ b/linden/indra/llcommon/lllivefile.cpp
@@ -0,0 +1,93 @@
+/** 
+ * @file lllivefile.cpp
+ *
+ * Copyright (c) 2006-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#include "linden_common.h"
+
+#include "lllivefile.h"
+
+
+LLLiveFile::LLLiveFile(const std::string &filename, const F32 refresh_period) :
+mForceCheck(true),
+mRefreshPeriod(refresh_period),
+mFilename(filename),
+mLastModTime(0),
+mLastExists(false)
+{
+}
+
+
+LLLiveFile::~LLLiveFile()
+{
+}
+
+
+bool LLLiveFile::checkAndReload()
+{
+        if (!mForceCheck && mRefreshTimer.getElapsedTimeF32() < mRefreshPeriod)
+        {
+                // Skip the check if not enough time has elapsed and we're not
+                // forcing a check of the file
+                return false;
+        }
+        mForceCheck = false;
+        mRefreshTimer.reset();
+
+        // Stat the file to see if it exists and when it was last modified.
+        llstat stat_data;
+        int res = LLFile::stat(mFilename.c_str(), &stat_data);
+
+        if (res)
+        {
+                // Couldn't stat the file, that means it doesn't exist or is
+                // broken somehow.  Clear flags and return.
+                if (mLastExists)
+                {
+                        loadFile(); // Load the file, even though it's missing to allow it to clear state.
+                        mLastExists = false;
+                        return true;
+                }
+                return false;
+        }
+
+        // The file exists, decide if we want to load it.
+        if (mLastExists)
+        {
+                // The file existed last time, don't read it if it hasn't changed since
+                // last time.
+                if (stat_data.st_mtime <= mLastModTime)
+                {
+                        return false;
+                }
+        }
+
+        // We want to read the file.  Update status info for the file.
+        mLastExists = true;
+        mLastModTime = stat_data.st_mtime;
+        
+        loadFile();
+        return true;
+}
+