Add stack allocator

engine/CMakeLists.txt

@@ -33,9 +33,11 @@ set(libraryDirs
 
 set(BreezeSources
         breeze/core/logger.c
-        breeze/core/memory.c
         breeze/core/module_system.c
 
+        breeze/memory/memory.c
+        breeze/memory/stack_alloc.c
+
         breeze/map/map.c
         breeze/map/tileset.c
 
@@ -48,10 +50,12 @@ set(BreezeSources
 
 set(BreezeHeaders
         breeze/core/logger.h
-        breeze/core/memory.h
 
         breeze/math/vec2i.h
 
+        breeze/memory/memory.h
+        breeze/memory/stack_alloc.h
+
         breeze/map/map.h
         breeze/map/tileset.h
 

engine/breeze.h

@@ -2,10 +2,12 @@
 #define BREEZE_H
 
 #include "breeze/core/logger.h"
-#include "breeze/core/memory.h"
 
 #include "breeze/math/vec2i.h"
 
+#include "breeze/memory/memory.h"
+#include "breeze/memory/stack_alloc.h"
+
 #include "breeze/util/array.h"
 #include "breeze/util/heap.h"
 #include "breeze/util/object_pool.h"

engine/breeze/map/map.c

@@ -1,7 +1,7 @@
 #include "map.h"
 
 #include "../core/logger.h"
-#include "../core/memory.h"
+#include "../memory/memory.h"
 #include "../math/vec2i.h"
 
 #include <cute_tiled.h>

engine/breeze/map/tileset.c

@@ -2,7 +2,7 @@
 #include <stdio.h>
 
 #include "tileset.h"
-#include "../core/memory.h"
+#include "../memory/memory.h"
 
 BzTileset BZ_TILESET_INVALID = {.isValid = false};
 

engine/breeze/memory/memory.c

@@ -1,6 +1,6 @@
 #include "memory.h"
 
-#include "logger.h"
+#include "../core/logger.h"
 
 #include <malloc.h>
 #include <memory.h>

engine/breeze/memory/stack_alloc.c

@@ -0,0 +1,34 @@
+#include "stack_alloc.h"
+
+#include "memory.h"
+
+BzStackAlloc bzStackAllocCreate(size_t size) {
+    BzStackAlloc alloc = {
+            .memory=bzAlloc(size),
+            .size=size,
+            .allocated=0
+    };
+    BZ_ASSERT(alloc.memory);
+
+    return alloc;
+}
+
+void bzStackAllocDestroy(BzStackAlloc *alloc) {
+    bzFree(alloc->memory);
+    alloc->memory    = NULL;
+    alloc->size      = 0;
+    alloc->allocated = 0;
+}
+
+void *bzStackAlloc(BzStackAlloc *alloc, size_t numBytes) {
+    BZ_ASSERT(alloc->size + numBytes < alloc->size);
+    void *allocated = (u8 *) alloc->memory + alloc->allocated;
+    alloc->allocated += numBytes;
+    return allocated;
+}
+
+void bzStackAllocFree(BzStackAlloc *alloc, void *ptr) {
+    size_t byteOffset = (u8 *) ptr - (u8 *) alloc->memory;
+    BZ_ASSERT(byteOffset >= 0 && byteOffset < alloc->size);
+    alloc->allocated = byteOffset;
+}

engine/breeze/memory/stack_alloc.h

@@ -0,0 +1,18 @@
+#ifndef BREEZE_STACK_ALLOC_H
+#define BREEZE_STACK_ALLOC_H
+
+#include "../defines.h"
+
+typedef struct BzStackAlloc {
+    void *memory;
+    size_t size;
+    size_t allocated;
+} BzStackAlloc;
+
+BzStackAlloc bzStackAllocCreate(size_t size);
+void         bzStackAllocDestroy(BzStackAlloc *alloc);
+
+void *bzStackAlloc(BzStackAlloc *alloc, size_t numBytes);
+void  bzStackAllocFree(BzStackAlloc *alloc, void *ptr);
+
+#endif //BREEZE_STACK_ALLOC_H

engine/breeze/util/array.c

@@ -1,6 +1,6 @@
 #include "array.h"
 
-#include "../core/memory.h"
+#include "../memory//memory.h"
 
 typedef struct BzArrayHead {
     i32 capacity;

engine/breeze/util/heap.c

@@ -1,6 +1,6 @@
 #include "heap.h"
 
-#include "../core/memory.h"
+#include "../memory/memory.h"
 
 typedef struct BzHeapHead {
     i32 capacity;

engine/breeze/util/object_pool.c

@@ -1,6 +1,6 @@
 #include "object_pool.h"
 
-#include "../core/memory.h"
+#include "../memory/memory.h"
 
 typedef struct BzObjectPool {
     void *objects;

engine/breeze/util/spatial_grid.c

@@ -1,6 +1,6 @@
 #include "spatial_grid.h"
 
-#include "../core/memory.h"
+#include "../memory/memory.h"
 #include "array.h"
 #include "object_pool.h"
 

engine/libs/cute_tiled/cute_tiled.c

@@ -1,5 +1,5 @@
 #include <breeze/core/logger.h>
-#include <breeze/core/memory.h>
+#include <breeze/memory/memory.h>
 
 #if 1