almost there (open window)

Juliet/core/core.c

@@ -27,4 +27,4 @@ internal int32 safe_cast_int32(int64 val)
 
 #define STB_SPRINTF_IMPLEMENTATION
 #define STB_SPRINTF_STATIC
-#include "external/stb/stb_sprintf.h"
+#include "external/stb_sprintf/stb_sprintf.h"

Juliet/core/core.h

@@ -7,7 +7,7 @@
 
 #define STB_SPRINTF_DECORATE(name) juliet_##name
 #define STB_SPRINTF_STATIC
-#include "external/stb/stb_sprintf.h"
+#include "external/stb_sprintf/stb_sprintf.h"
 
 #define internal static
 #define global static
@@ -119,30 +119,33 @@
 #define CheckNil(nil, ptr) ((ptr) == 0 || (ptr) == nil)
 #define SetNil(nil, ptr) ((ptr) = nil)
 
+// Doubly-linked-lists
 // clang-format off
-#define DLL_insert_NPZ(nil, first, last, ptr, node, next, previous)                                                                   \
+#define DLL_insert_next_prev_zero(nil, first, last, ptr, node, next, previous)                                                                   \
     (CheckNil(nil, first) ? ((first) = (last) = (node), SetNil(nil, (node)->next), SetNil(nil, (node)->previous))                     \
      : CheckNil(nil, ptr) ? ((node)->next = (first), (first)->previous = (node), (first) = (node), SetNil(nil, (node)->previous))     \
      : ((ptr) == (last))  ? ((last)->next = (node),  (node )->previous = (last), (last ) = (node), SetNil(nil, (node)->next))         \
                           : (((CheckNil(nil, ptr) && CheckNil(nil, (ptr)->next)) ? (0) : ((ptr)->next->previous = (node))),           \
                          ((node)->next = (ptr)->next), ((ptr)->next = (node)), ((node)->previous = (ptr))))
-// clang-format on
-#define DLL_push_back_NPZ(nil, first, last, node, next, previous)                                                      \
-    DLL_insert_NPZ(nil, first, last, last, node, next, previous)
-#define DLL_remove_NPZ(nil, first, last, node, next, previous)                                                         \
+#define DLL_push_back_next_prev_zero(nil, first, last, node, next, previous)                                           \
+    DLL_insert_next_prev_zero(nil, first, last, last, node, next, previous)
+#define DLL_remove_next_prev_zero(nil, first, last, node, next, previous)                                              \
     (((node) == (first) ? (first) = (node)->next : (0)), ((node) == (last) ? (last) = (last)->previous : (0)),         \
      (CheckNil(nil, (node)->previous) ? (0) : ((node)->previous->next = (node)->next)),                                \
      (CheckNil(nil, (node)->next) ? (0) : ((node)->next->previous = (node)->previous)))
+// clang-format on
 
 // Single (link & head) lists (= stacks)
-#define SLL_stack_push_node(first, node, next) ((node)->next = (first), (first) = (node))
-#define SLL_stack_pop_node(first, next) ((first) = (first)->next);
-#define SLL_stack_push(first, node) SLL_stack_push_node(first, node, next)
-#define SLL_stack_pop(first) SLL_stack_pop_node(first, next)
+#define SLL_stack_push_next(first, node, next) ((node)->next = (first), (first) = (node))
+#define SLL_stack_pop_next(first, next) ((first) = (first)->next);
+#define SLL_stack_push(first, node) SLL_stack_push_next(first, node, next)
+#define SLL_stack_pop(first) SLL_stack_pop_next(first, next)
 
 // Double linked list helpers
-#define DLL_push_back(first, last, node) DLL_push_back_NPZ(0, first, last, node, next, previous)
-#define DLL_remove(first, last, node) DLL_remove_NPZ(0, first, last, node, next, previous)
+#define DLL_push_back_next_prev(first, last, node, next, previous)                                                     \
+    DLL_push_back_next_prev_zero(0, first, last, node, next, previous)
+#define DLL_push_back(first, last, node) DLL_push_back_next_prev_zero(0, first, last, node, next, previous)
+#define DLL_remove(first, last, node) DLL_remove_next_prev_zero(0, first, last, node, next, previous)
 
 // =============================================================================
 // Helpers

Juliet/core/core_arena.c

@@ -101,7 +101,7 @@ internal void* arena_push(Arena* arena, uint64 size, uint64 align, bool32 zero)
         }
 
         new_block->base_position = current->base_position + current->reserved;
-        SLL_stack_push_node(arena->current, new_block, previous);
+        SLL_stack_push_next(arena->current, new_block, previous);
 
         current  = new_block;
         pos_pre  = AlignPow2(current->position, align);

Juliet/core/core_hash.c

@@ -21,5 +21,6 @@ internal uint64 uint64_hash_from_string(String8 string)
 
 internal uint64 uint64_hash_from_seed_string(uint64 seed, String8 string)
 {
-    return 0;
+    uint64 result = XXH3_64bits_withSeed(string.str, string.size, seed);
+    return result;
 }

Juliet/julietapp/julietapp_core.c

@@ -5,8 +5,12 @@ internal void ja_init()
     ja_state->arena = arena;
 
     // Window cache
+    {
         ja_state->window_state_gen_id      = 1;
+        ja_state->window_state_slots_count = 64;
+        ja_state->window_state_slots       = push_array(arena, JA_WindowStateSlot, ja_state->window_state_slots_count);
         ja_state->first_window_state = ja_state->last_window_state = &ja_nil_window_state;
+    }
 }
 
 internal void ja_frame()
@@ -46,10 +50,9 @@ internal void ja_frame()
 
     // Window management (open/render)
     {
-        for
-            EachIndex(slot_idx, ja_state->window_state_gen_id)
+        for (uint64 id = 1; id < ja_state->window_state_gen_id + 1; ++id)
         {
-                JA_WindowState* ws = ja_window_state_from_id(slot_idx);
+            JA_WindowState* ws = ja_window_state_from_id(id);
         }
     }
 
@@ -76,9 +79,43 @@ internal JA_WindowState* ja_window_state_from_id(JA_ID id)
     else
     {
         uint64              hash     = uint64_hash_from_string(str8_struct(&id));
+        uint64              slot_idx = hash % ja_state->window_state_slots_count;
+        JA_WindowStateSlot* slot     = &ja_state->window_state_slots[slot_idx];
+        for (JA_WindowState* w = slot->first; w != 0; w = w->hash_next)
+        {
+            if (w->id == id)
+            {
+                ws = w;
+                break;
+            }
+        }
     }
 
     // allocate / open window if none found for this id
+    if (ws == &ja_nil_window_state)
+    {
+        ws = ja_state->free_window_state;
+        if (ws != 0)
+        {
+            SLL_stack_pop_next(ja_state->free_window_state, order_next);
+        }
+        else
+        {
+            ws = push_array_no_zero(ja_state->arena, JA_WindowState, 1);
+        }
+        MemoryZeroStruct(ws);
+
+        ws->id    = id;
+        ws->arena = arena_alloc();
+
+        // hook up the window
+        uint64              hash     = uint64_hash_from_string(str8_struct(&id));
+        uint64              slot_idx = hash % ja_state->window_state_slots_count;
+        JA_WindowStateSlot* slot     = &ja_state->window_state_slots[slot_idx];
+        DLL_push_back_next_prev_zero(&ja_nil_window_state, ja_state->first_window_state, ja_state->last_window_state,
+                                     ws, order_next, order_previous);
+        DLL_push_back_next_prev(slot->first, slot->last, ws, hash_next, hash_previous);
+    }
 
     return ws;
 }

Juliet/julietapp/julietapp_core.h

@@ -10,14 +10,25 @@ typedef uint64 JA_ID;
 typedef struct JA_WindowState JA_WindowState;
 struct JA_WindowState
 {
+    // links and metadata
     JA_WindowState* order_next;
     JA_WindowState* order_previous;
     JA_WindowState* hash_next;
     JA_WindowState* hash_previous;
     JA_ID           id;
+
+    // Info and handle
+    Arena*    arena;
     WM_Window plat_handle;
 };
 
+typedef struct JA_WindowStateSlot JA_WindowStateSlot;
+struct JA_WindowStateSlot
+{
+    JA_WindowState* first;
+    JA_WindowState* last;
+};
+
 typedef struct JA_State JA_State;
 struct JA_State
 {
@@ -26,11 +37,14 @@ struct JA_State
     bool32 quit;
 
     // Windows
+    JA_WindowState*     free_window_state;
+    uint64              window_state_slots_count;
+    JA_WindowStateSlot* window_state_slots;
     JA_WindowState*     first_window_state;
     JA_WindowState*     last_window_state;
-    JA_WindowState* window_state_last_accessed;
     JA_ID               window_state_last_accessed_id;
     JA_ID               window_state_gen_id;
+    JA_WindowState*     window_state_last_accessed;
 };
 
 // =============================================================================