Fix C++11 compilability

Previous commits broke it... :(

src/script/cpp_api/s_base.cpp

@@ -68,7 +68,7 @@ public:
 */
 
 ScriptApiBase::ScriptApiBase() :
-	m_luastackmutex(true)
+	m_luastackmutex()
 {
 #ifdef SCRIPTAPI_LOCK_DEBUG
 	m_lock_recursion_count = 0;

src/script/cpp_api/s_base.h

@@ -108,7 +108,7 @@ protected:
 	void objectrefGetOrCreate(lua_State *L, ServerActiveObject *cobj);
 	void objectrefGet(lua_State *L, u16 id);
 
-	Mutex           m_luastackmutex;
+	RecursiveMutex  m_luastackmutex;
 	std::string     m_last_run_mod;
 	bool            m_secure;
 #ifdef SCRIPTAPI_LOCK_DEBUG

src/script/cpp_api/s_internal.h

@@ -75,7 +75,7 @@ private:
 #endif
 
 #define SCRIPTAPI_PRECHECKHEADER                                               \
-		MutexAutoLock scriptlock(this->m_luastackmutex);                       \
+		RecursiveMutexAutoLock scriptlock(this->m_luastackmutex);              \
 		SCRIPTAPI_LOCK_CHECK;                                                  \
 		realityCheck();                                                        \
 		lua_State *L = getStack();                                             \

src/threading/event.h

@@ -29,6 +29,7 @@ DEALINGS IN THE SOFTWARE.
 #if __cplusplus >= 201103L
 	#include <condition_variable>
 	#include "threading/mutex.h"
+	#include "threading/mutex_auto_lock.h"
 #elif defined(_WIN32)
 	#ifndef WIN32_LEAN_AND_MEAN
 		#define WIN32_LEAN_AND_MEAN

src/threading/mutex.cpp

@@ -34,7 +34,18 @@ DEALINGS IN THE SOFTWARE.
 
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
+Mutex::Mutex()
+{
+	init_mutex(false);
+}
+
+
 Mutex::Mutex(bool recursive)
+{
+	init_mutex(recursive);
+}
+
+void Mutex::init_mutex(bool recursive)
 {
 #ifdef _WIN32
 	// Windows critical sections are recursive by default
@@ -89,5 +100,9 @@ void Mutex::unlock()
 #endif
 }
 
+RecursiveMutex::RecursiveMutex()
+	: Mutex(true)
+{}
+
 #endif
 

src/threading/mutex.h

@@ -30,6 +30,7 @@ DEALINGS IN THE SOFTWARE.
 #if __cplusplus >= 201103L && !defined(_WIN32)
 	#include <mutex>
 	using Mutex = std::mutex;
+	using RecursiveMutex = std::recursive_mutex;
 #else
 
 #ifdef _WIN32
@@ -49,11 +50,14 @@ DEALINGS IN THE SOFTWARE.
 class Mutex
 {
 public:
-	Mutex(bool recursive=false);
+	Mutex();
 	~Mutex();
 	void lock();
 	void unlock();
 
+protected:
+	Mutex(bool recursive);
+	void init_mutex(bool recursive);
 private:
 #ifdef _WIN32
 	CRITICAL_SECTION mutex;
@@ -64,6 +68,14 @@ private:
 	DISABLE_CLASS_COPY(Mutex);
 };
 
+class RecursiveMutex : public Mutex
+{
+public:
+	RecursiveMutex();
+
+	DISABLE_CLASS_COPY(RecursiveMutex);
+};
+
 #endif  // C++11
 
 #endif

src/threading/mutex_auto_lock.h

@@ -28,7 +28,8 @@ DEALINGS IN THE SOFTWARE.
 
 #if __cplusplus >= 201103L
 	#include <mutex>
-	using MutexAutoLock = std::lock_guard<std::mutex>;
+	using MutexAutoLock = std::unique_lock<std::mutex>;
+	using RecursiveMutexAutoLock = std::unique_lock<std::recursive_mutex>;
 #else
 
 #include "threading/mutex.h"
@@ -44,6 +45,15 @@ private:
 	Mutex &mutex;
 };
 
+class RecursiveMutexAutoLock
+{
+public:
+	RecursiveMutexAutoLock(RecursiveMutex &m) : mutex(m) { mutex.lock(); }
+	~RecursiveMutexAutoLock() { mutex.unlock(); }
+
+private:
+	RecursiveMutex &mutex;
+};
 #endif
 
 #endif