1.8.7 player_switchWeapon updates

SQF/dayz_code/util/Mutex.hpp

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+/* Provides a simple mutex implementation.
+See https://en.wikipedia.org/wiki/Mutual_exclusion
+
+Author: Foxy
+*/
+
+#ifndef _INCLUDE_GUARD_MUTEX
+#define _INCLUDE_GUARD_MUTEX
+
+//Initializes a new unlocked mutex.
+#define Mutex_New() [true]
+
+//Attempts to lock the specified mutex. Returns true if the mutex was locked.
+#define Mutex_TryLock(mtx) ((mtx) call dz_fn_mutex_tryLock)
+#define Mutex_TryLock_Fast(mtx) ([(mtx) select 0, (mtx) set [0, false]] select 0)
+
+//Determines if the mutex is locked.
+//Note: if access to critical section is required use TryLock() instead.
+#define Mutex_IsLocked(mtx) (!(mtx) select 0)
+
+//Waits until the mutex becomes available and locks it.
+#define Mutex_WaitLock(mtx) ((mtx) call dz_fn_mutex_waitLock)
+#define Mutex_WaitLock_Fast(mtx) waitUntil {Mutex_TryLock_Fast(mtx)}
+
+//Unlocks the mutex. Use only when you have previously obtained lock yourself.
+#define Mutex_Unlock(mtx) ((mtx) set [0, true])
+
+#endif