Add allocator interface

src/base_core.h

@@ -344,6 +344,46 @@ static INLINE U64 SaturatingMult64(U64 a, U64 b)
     return SaturatingMult(a, b, U64, U64_Max);
 }
 
+// Allocators
+typedef enum AllocOperation AllocOperation;
+enum AllocOperation {
+    Alloc_Op_Aligned = 1,
+    Alloc_Op_Free,
+    Alloc_Op_Free_All,
+};
+
+typedef struct Allocator Allocator;
+typedef void *(*AllocOpFunc)(Allocator *allocator, AllocOperation operation, void *memory, U32 size, U32 align);
+struct Allocator {
+    AllocOpFunc op_func_ptr;
+    void *data;
+};
+
+static INLINE void *allocator_alloc_aligned(Allocator *allocator, U32 size, U32 align)
+{
+    return allocator->op_func_ptr(allocator, Alloc_Op_Aligned, NULL, size, align);
+}
+
+static INLINE void allocator_free(Allocator *allocator, void *memory)
+{
+    allocator->op_func_ptr(allocator, Alloc_Op_Free, memory, 0, 0);
+}
+
+static INLINE void  allocator_free_all(Allocator *allocator)
+{
+    allocator->op_func_ptr(allocator, Alloc_Op_Free_All, NULL, 0, 0);
+}
+
+
+#define allocator_push_type(allocator, type_)\
+    (allocator)->op_func_ptr((allocator), Alloc_Op_Aligned, NULL, sizeof(type_), _Alignof(type_))
+
+#define allocator_push_array(allocator, type_, nr_elements)\
+    (allocator)->op_func_ptr((allocator), Alloc_Op_Aligned, NULL, sizeof(type_) * (nr_elements), _Alignof(type_) )
+
+#define allocator_push(allocator, size, align)\
+    (allocator)->op_func_ptr((allocator), Alloc_Op_Aligned, NULL, size, align)
+
 // address-sanitizer helpers (-fsanitize=address)
 #ifdef USE_ASAN
 #include <sanitizer/asan_interface.h>