Add mutex syscalls

libmsl/alloc/liballoc.c

@@ -4,14 +4,18 @@
 #include <alloc/liballoc.h>
 #include <m/system.h>
 
+#define LIBALLOC_MUTEX 500
+
 static uintptr_t liballoc_map_base = PROC_MAP_BASE;
 static int mem_rid_base = 1000000;
 
-void liballoc_init (void) {}
+void liballoc_init (void) { create_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
-int liballoc_lock (void) { return 0; }
+void liballoc_deinit (void) { unlink_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
-int liballoc_unlock (void) { return 0; }
+int liballoc_lock (void) { return lock_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
+
+int liballoc_unlock (void) { return unlock_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
 void* liballoc_alloc (int pages, int* mem_rid) {
   uintptr_t current_base = liballoc_map_base;

libmsl/alloc/liballoc.h

@@ -87,6 +87,7 @@ void* calloc (size_t, size_t); //< The standard function.
 void free (void*);             //< The standard function.
 
 void liballoc_init (void);
+void liballoc_deinit (void);
 
 #ifdef __cplusplus
 }