enable more reset delay slots

include/mimalloc-types.h

@@ -390,13 +390,20 @@ void _mi_stat_counter_increase(mi_stat_counter_t* stat, size_t amount);
 // ------------------------------------------------------
 typedef int64_t mi_msecs_t;
 
+#define MI_RESET_DELAY_SLOTS (256)
+
 typedef struct mi_delay_slot_s {
   mi_msecs_t expire;
   uint8_t*   addr;
   size_t     size;
 } mi_delay_slot_t;
 
-#define MI_RESET_DELAY_SLOTS (128)
+typedef struct mi_delay_slots_s {
+  size_t     capacity; // always `MI_RESET_DELAY_SLOTS`
+  size_t     count;    // current slots used (`<= capacity`)
+  mi_delay_slot_t slots[MI_RESET_DELAY_SLOTS];
+} mi_delay_slots_t;
+
 
 // ------------------------------------------------------
 // Thread Local data
@@ -411,8 +418,8 @@ typedef struct mi_segment_queue_s {
 // OS thread local data
 typedef struct mi_os_tld_s {
   size_t              region_idx;   // start point for next allocation
-  mi_stats_t* stats;        // points to tld stats
-  mi_delay_slot_t     reset_delay[MI_RESET_DELAY_SLOTS];
+  mi_delay_slots_t*   reset_delay;  // delay slots for OS reset operations
+  mi_stats_t*         stats;        // points to tld stats
 } mi_os_tld_t;
 
 // Segments thread local data