diff options
| -rw-r--r-- | intern/guardedalloc/MEM_guardedalloc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/intern/guardedalloc/MEM_guardedalloc.h b/intern/guardedalloc/MEM_guardedalloc.h index d071def2ca4..dccb7a32139 100644 --- a/intern/guardedalloc/MEM_guardedalloc.h +++ b/intern/guardedalloc/MEM_guardedalloc.h @@ -268,6 +268,12 @@ void MEM_use_guarded_allocator(void); * Allocate new memory for and constructs an object of type #T. * #MEM_delete should be used to delete the object. Just calling #MEM_freeN is not enough when #T * is not a trivial type. + * + * Note that when no arguments are passed, C++ will do recursive member-wise value initialization. + * That is because C++ differentiates between creating an object with `T` (default initialization) + * and `T()` (value initialization), whereby this function does the latter. Value initialization + * rules are complex, but for C-style structs, memory will be zero-initialized. So this doesn't + * match a `malloc()`, but a `calloc()` call in this case. See https://stackoverflow.com/a/4982720. */ template<typename T, typename... Args> inline T *MEM_new(const char *allocation_name, Args &&...args) |