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cKit/Memory/c_Arena.h

@@ -0,0 +1,62 @@
+#ifndef INCLUDED_C_ARENA_H
+#define INCLUDED_C_ARENA_H
+
+#ifndef INCLUDED_C_BASE_H
+#include <c_Base.h>
+#endif /*INCLUDED_C_BASE_H*/
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct {
+    uint8_t* buf;
+    c_size_t buf_len;
+    c_size_t prev_offset;
+    c_size_t curr_offset;
+}c_Arena_t;
+
+typedef struct {
+    c_Arena_t* arena;
+    c_size_t prev_offset;
+    c_size_t curr_offset;
+}c_ArenaTemp_t;
+
+void c_Arena_Init(c_Arena_t* a, void* buf, c_size_t buf_len);
+
+void *c_Arena_Alloc(c_Arena_t *a, c_size_t size);
+
+void *c_Arena_Resize(c_Arena_t *a, void *old_memory, c_size_t old_size, c_size_t new_size);
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+C_STATIC_FORCE_INLINE
+void c_Arena_Destroy(c_Arena_t* a) {
+    a->curr_offset = a->prev_offset = 0;
+}
+
+C_STATIC_FORCE_INLINE
+void c_Arena_Free(c_Arena_t *a, void *ptr) {
+    C_UNUSED(a);
+    C_UNUSED(ptr);
+}
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+C_STATIC_FORCE_INLINE
+c_ArenaTemp_t c_ArenaTemp_Begin(c_Arena_t *a) {
+    c_ArenaTemp_t temp;
+    temp.arena = a;
+    temp.prev_offset = a->prev_offset;
+    temp.curr_offset = a->prev_offset;
+    return temp;
+}
+
+C_STATIC_FORCE_INLINE
+void c_ArenaTemp_End(c_ArenaTemp_t *a) {
+    a->arena->curr_offset = a->curr_offset;
+    a->arena->prev_offset = a->prev_offset;
+}
+
+#endif /*INCLUDED_C_ARENA_H*/