From d7ae42d3775f88d5cd63fa2f8860bd31e18f981e Mon Sep 17 00:00:00 2001
From: isanae <14251494+isanae@users.noreply.github.com>
Date: Sun, 8 Nov 2020 22:09:42 -0500
Subject: renamed singleinstance.h/cpp to multiprocess.h/cpp

---
 src/multiprocess.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/multiprocess.h

(limited to 'src/multiprocess.h')

diff --git a/src/multiprocess.h b/src/multiprocess.h
new file mode 100644
index 00000000..810e63d2
--- /dev/null
+++ b/src/multiprocess.h
@@ -0,0 +1,70 @@
+#ifndef MODORGANIZER_MOMULTIPROCESS_INCLUDED
+#define MODORGANIZER_MOMULTIPROCESS_INCLUDED
+
+#include <QObject>
+#include <QSharedMemory>
+#include <QLocalServer>
+
+
+/**
+ * used to ensure only a single process of Mod Organizer is started and to
+ * allow ephemeral processes to send messages to the primary (visible) one.
+ * This way, other processes can start a download in the primary one
+ **/
+class MOMultiProcess : public QObject
+{
+  Q_OBJECT
+
+public:
+  // `allowMultiple`: if another process is running, run this one
+  // disconnected from the shared memory
+  explicit MOMultiProcess(bool allowMultiple, QObject *parent = 0);
+
+  /**
+   * @return true if this process's job is to forward data to the primary
+   *              process through shared memory
+   **/
+  bool ephemeral() const
+  {
+    return m_Ephemeral;
+  }
+
+  // returns true if this is not the primary process, but was allowed because
+  // of the AllowMultiple flag
+  //
+  bool secondary() const
+  {
+    return !m_Ephemeral && !m_OwnsSM;
+  }
+
+  /**
+   * send a message to the primary process. This can be used to transmit download urls
+   *
+   * @param message message to send
+   **/
+  void sendMessage(const QString &message);
+
+signals:
+
+  /**
+   * @brief emitted when an ephemeral process has sent a message (to us)
+   *
+   * @param message the message we received
+   **/
+  void messageSent(const QString &message);
+
+public slots:
+
+private slots:
+
+  void receiveMessage();
+
+private:
+  bool m_Ephemeral;
+  bool m_OwnsSM;
+  QSharedMemory m_SharedMem;
+  QLocalServer m_Server;
+
+};
+
+#endif // MODORGANIZER_MOMULTIPROCESS_INCLUDED
-- 
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