From 3a418a0bbc8e155e5395595c5e25c038d3c7c773 Mon Sep 17 00:00:00 2001
From: Shauren <shauren.trinity@gmail.com>
Date: Thu, 11 May 2017 22:29:51 +0200
Subject: Core/Common: Include cleanup

---
 src/common/Threading/ProcessPriority.cpp | 95 ++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/common/Threading/ProcessPriority.cpp

(limited to 'src/common/Threading/ProcessPriority.cpp')

diff --git a/src/common/Threading/ProcessPriority.cpp b/src/common/Threading/ProcessPriority.cpp
new file mode 100644
index 00000000000..da3cc83a544
--- /dev/null
+++ b/src/common/Threading/ProcessPriority.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2008-2017 TrinityCore <http://www.trinitycore.org/>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ProcessPriority.h"
+#include "Log.h"
+
+#ifdef _WIN32 // Windows
+#include <Windows.h>
+#elif defined(__linux__)
+#include <sched.h>
+#include <sys/resource.h>
+#define PROCESS_HIGH_PRIORITY -15 // [-20, 19], default is 0
+#endif
+
+void SetProcessPriority(std::string const& logChannel, uint32 affinity, bool highPriority)
+{
+    ///- Handle affinity for multiple processors and process priority
+#ifdef _WIN32 // Windows
+
+    HANDLE hProcess = GetCurrentProcess();
+    if (affinity > 0)
+    {
+        ULONG_PTR appAff;
+        ULONG_PTR sysAff;
+
+        if (GetProcessAffinityMask(hProcess, &appAff, &sysAff))
+        {
+            // remove non accessible processors
+            ULONG_PTR currentAffinity = affinity & appAff;
+
+            if (!currentAffinity)
+                TC_LOG_ERROR(logChannel, "Processors marked in UseProcessors bitmask (hex) %x are not accessible. Accessible processors bitmask (hex): %x", affinity, appAff);
+            else if (SetProcessAffinityMask(hProcess, currentAffinity))
+                TC_LOG_INFO(logChannel, "Using processors (bitmask, hex): %x", currentAffinity);
+            else
+                TC_LOG_ERROR(logChannel, "Can't set used processors (hex): %x", currentAffinity);
+        }
+    }
+
+    if (highPriority)
+    {
+        if (SetPriorityClass(hProcess, HIGH_PRIORITY_CLASS))
+            TC_LOG_INFO(logChannel, "Process priority class set to HIGH");
+        else
+            TC_LOG_ERROR(logChannel, "Can't set process priority class.");
+    }
+
+#elif defined(__linux__) // Linux
+
+    if (affinity > 0)
+    {
+        cpu_set_t mask;
+        CPU_ZERO(&mask);
+
+        for (unsigned int i = 0; i < sizeof(affinity) * 8; ++i)
+            if (affinity & (1 << i))
+                CPU_SET(i, &mask);
+
+        if (sched_setaffinity(0, sizeof(mask), &mask))
+            TC_LOG_ERROR(logChannel, "Can't set used processors (hex): %x, error: %s", affinity, strerror(errno));
+        else
+        {
+            CPU_ZERO(&mask);
+            sched_getaffinity(0, sizeof(mask), &mask);
+            TC_LOG_INFO(logChannel, "Using processors (bitmask, hex): %lx", *(__cpu_mask*)(&mask));
+        }
+    }
+
+    if (highPriority)
+    {
+        if (setpriority(PRIO_PROCESS, 0, PROCESS_HIGH_PRIORITY))
+            TC_LOG_ERROR(logChannel, "Can't set process priority class, error: %s", strerror(errno));
+        else
+            TC_LOG_INFO(logChannel, "Process priority class set to %i", getpriority(PRIO_PROCESS, 0));
+    }
+#else
+    (void)logChannel;
+    (void)affinity;
+    (void)highPriority;
+#endif
+}
-- 
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