refs #756 Added class CProcessInfo to obtain a process name from its PID, and check if a process exists.

src/blackmisc/processinfo.cpp

@@ -0,0 +1,62 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "blackmisc/processinfo.h"
+#include <QFile>
+#include <QFileInfo>
+#include <type_traits>
+
+#if defined(Q_OS_OSX)
+#include <libproc.h>
+#elif defined(Q_OS_WIN)
+#include <windows.h>
+#include <psapi.h>
+#endif
+
+namespace BlackMisc
+{
+
+    QString CProcessInfo::convertToQString(bool) const
+    {
+        return QString("{ %1, %2 }").arg(QString::number(m_pid), m_name);
+    }
+
+#if defined(Q_OS_LINUX)
+    QString CProcessInfo::processNameFromId(qint64 pid)
+    {
+        QString path = QFileInfo(QString("/proc/%1/exe").arg(pid)).symLinkTarget();
+        return QFileInfo(path).fileName();
+    }
+#elif defined(Q_OS_OSX)
+    QString CProcessInfo::processNameFromId(qint64 pid)
+    {
+        char name[1024];
+        proc_name(pid, name, std::extent<decltype(name)>::value);
+        return name;
+    }
+#elif defined(Q_OS_WIN)
+    QString CProcessInfo::processNameFromId(qint64 pid)
+    {
+        HANDLE proc = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, static_cast<DWORD>(pid));
+        if (! proc) { return ""; }
+        wchar_t path[1024];
+        auto len = GetModuleFileNameEx(proc, nullptr, path, std::extent<decltype(path)>::value);
+        CloseHandle(proc);
+        if (len <= 0) { return ""; }
+        return QFileInfo(QString::fromWCharArray(path)).completeBaseName();
+    }
+#else
+    QString CProcessInfo::processNameFromId(qint64)
+    {
+        qFatal("Not implemented");
+        return "";
+    }
+#endif
+
+}