Do some more work on the concurrent queue

1 files changed, 6 insertions, 3 deletions

diff --git a/src/shared.h b/src/shared.h
index 825814e..66d1af3 100644
--- a/src/shared.h
+++ b/src/shared.h
@@ -7,6 +7,9 @@
 #define FALSE 0
 #define TRUE 1
 
+typedef int (*gcallback)(void*);    // Generic callback signature
+typedef void (*fcallback)(void*);   // free()-like callback signature
+
 #define RETURNWERR(errval, retval) do {\
     errno = (errval);\
     return (retval);\
@@ -60,12 +63,12 @@ char * xdirname(const char * const path);
 
 
 // Cleanup callback. Should act like `free()`, in that it doesn't crash if the pointer it's given is null
-typedef void (*cleanup_callback)(void*);
+typedef fcallback cleanup_callback;
 
 // Cleanup struct. Stores a STATICALLY defined array of callbacks and void* arguments
 typedef struct cl {
-        cleanup_callback *funcs;
-        void **args;
+        cleanup_callback *funcs;    // Actual type: cleanup_callback funcs[] 
+        void **args;                // Actual type: void *args[]
 
         int size;
         int used;