1 files changed, 33 insertions, 1 deletions
diff --git a/src/nvim/memory.h b/src/nvim/memory.h
index 62cc78360c..250ac3e08f 100644
--- a/src/nvim/memory.h
+++ b/src/nvim/memory.h
@@ -1,9 +1,41 @@
 #ifndef NVIM_MEMORY_H
 #define NVIM_MEMORY_H
 
+#include <stdbool.h>  // for bool
 #include <stdint.h>  // for uint8_t
 #include <stddef.h>  // for size_t
-#include <time.h>    // for time_t
+#include <time.h>  // for time_t
+
+/// `malloc()` function signature
+typedef void *(*MemMalloc)(size_t);
+
+/// `free()` function signature
+typedef void (*MemFree)(void *);
+
+/// `calloc()` function signature
+typedef void *(*MemCalloc)(size_t, size_t);
+
+/// `realloc()` function signature
+typedef void *(*MemRealloc)(void *, size_t);
+
+#ifdef UNIT_TESTING
+/// When unit testing: pointer to the `malloc()` function, may be altered
+extern MemMalloc mem_malloc;
+
+/// When unit testing: pointer to the `free()` function, may be altered
+extern MemFree mem_free;
+
+/// When unit testing: pointer to the `calloc()` function, may be altered
+extern MemCalloc mem_calloc;
+
+/// When unit testing: pointer to the `realloc()` function, may be altered
+extern MemRealloc mem_realloc;
+#endif
+
+#ifdef EXITFREE
+/// Indicates that free_all_mem function was or is running
+extern bool entered_free_all_mem;
+#endif
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "memory.h.generated.h"