Dogcows Code - chaz/homebank/blob - src/refcount.h

   1
   2 #ifndef __REFCOUNT_H__
   3 #define __REFCOUNT_H__
   4
   5 #include <glib.h>
   6
   7
   8 static inline gpointer rc_alloc(size_t size)
   9 {
  10         gpointer chunk = g_malloc0(size + sizeof(long));
  11         (*(long*)chunk) = 1;
  12         //g_print("ALLOC: %p (ref %ld)\n", (long*)chunk + 1, *(long*)chunk);
  13         return (long*)chunk + 1;
  14 }
  15
  16 static inline gpointer rc_ref(gpointer p)
  17 {
  18         //g_print("  REF: %p (ref %ld)\n", p, *((long*)p - 1));
  19         if (p) {
  20                 ++(*((long*)p - 1));
  21         }
  22         return p;
  23 }
  24
  25 static inline gboolean rc_unref(gpointer p)
  26 {
  27         //g_print("UNREF: %p (ref %ld)\n", p, *((long*)p - 1));
  28         if (p && --(*((long*)p - 1)) <= 0) {
  29                 return TRUE;
  30         }
  31         return FALSE;
  32 }
  33
  34 static inline void rc_free(gpointer p)
  35 {
  36         //g_print(" FREE: %p (ref %ld)\n", p, *((long*)p - 1));
  37         g_free((long*)p - 1);
  38 }
  39
  40 static inline gpointer rc_dup(gpointer p, size_t size)
  41 {
  42         if (p) {
  43                 gpointer chunk = (long*)p - 1;
  44                 gpointer new_chunk = g_memdup(chunk, size + sizeof(long));
  45                 *(long*)new_chunk = 1;
  46                 //g_print("  DUP: %p (ref %ld) -> %p (ref %ld)\n", p, *((long*)p - 1), (long*)new_chunk + 1, *(long*)new_chunk);
  47                 return (long*)new_chunk + 1;
  48         }
  49         //g_print("  DUP: NULL\n");
  50         return NULL;
  51 }
  52
  53
  54 #endif