From c8e719101e86b656b2b5fc80e87703ea2956bf2f Mon Sep 17 00:00:00 2001
From: Matthieu Gautier <mgautier@kymeria.fr>
Date: Thu, 8 Aug 2019 15:13:14 +0200
Subject: [PATCH] Add a new tool `Lock` to lock a mutex.

And automaticlly unlock it when the `Lock` got out of scope.
---
 include/meson.build  |  1 +
 include/tools/lock.h | 46 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 include/tools/lock.h

diff --git a/include/meson.build b/include/meson.build
index 045b7387d..b6e95a886 100644
--- a/include/meson.build
+++ b/include/meson.build
@@ -22,6 +22,7 @@ install_headers(
   'tools/pathTools.h',
   'tools/regexTools.h',
   'tools/stringTools.h',
+  'tools/lock.h',
   subdir:'kiwix/tools'
 )
 
diff --git a/include/tools/lock.h b/include/tools/lock.h
new file mode 100644
index 000000000..98c64937a
--- /dev/null
+++ b/include/tools/lock.h
@@ -0,0 +1,46 @@
+
+
+#ifndef KIWIXLIB_TOOL_LOCK_H
+#define KIWIXLIB_TOOL_LOCK_H
+
+#include <pthread.h>
+
+namespace kiwix {
+
+class Lock
+{
+  public:
+    explicit Lock(pthread_mutex_t* mutex) :
+      mp_mutex(mutex)
+    {
+      pthread_mutex_lock(mp_mutex);
+    }
+    ~Lock() {
+      if (mp_mutex != nullptr) {
+        pthread_mutex_unlock(mp_mutex);
+      }
+    }
+    Lock(Lock && other) :
+      mp_mutex(other.mp_mutex)
+    {
+      other.mp_mutex = nullptr;
+    }
+    Lock & operator=(Lock && other)
+    {
+      mp_mutex = other.mp_mutex;
+      other.mp_mutex = nullptr;
+      return *this;
+    }
+
+
+  private:
+    pthread_mutex_t* mp_mutex;
+
+    Lock(Lock const &) = delete;
+    Lock & operator=(Lock const &) = delete;
+};
+
+
+}
+
+#endif //KIWIXLIB_TOOL_LOCK_H