protect_allocator configure option is gone, long live allocator (more embedders-friendly)

1 files changed, 26 insertions, 0 deletions

diff --git a/src/universe.h b/src/universe.h
index 359dc90..8727bf7 100644
--- a/src/universe.h
+++ b/src/universe.h
@@ -24,6 +24,24 @@ typedef struct s_Lane Lane;
 
 // ################################################################################################
 
+// everything we need to provide to lua_newstate()
+struct AllocatorDefinition_s
+{
+        lua_Alloc allocF;
+        void* allocUD;
+};
+typedef struct AllocatorDefinition_s AllocatorDefinition;
+
+// mutex-protected allocator for use with Lua states that share a non-threadsafe allocator
+struct ProtectedAllocator_s
+{
+        AllocatorDefinition definition;
+        MUTEX_T lock;
+};
+typedef struct ProtectedAllocator_s ProtectedAllocator;
+
+// ################################################################################################
+
 // everything regarding the a Lanes universe is stored in that global structure
 // held as a full userdata in the master Lua state that required it for the first time
 // don't forget to initialize all members in LG_configure()
@@ -34,8 +52,16 @@ struct s_Universe
 
         bool_t demoteFullUserdata;
 
+        // before a state is created, this function will be called to obtain the allocator
+        lua_CFunction provide_allocator;
+
+        // after a state is created, this function will be called right after the bases libraries are loaded
         lua_CFunction on_state_create_func;
 
+        // Initialized and used only if allocator="protected" is found in the configuration settings
+        // contains a mutex and the original allocator definition
+        ProtectedAllocator protected_allocator;
+
         Keepers* keepers;
 
         // Initialized by 'init_once_LOCKED()': the deep userdata Linda object