20260829 Redesign

Memory/c_Arena.h

@@ -0,0 +1,76 @@
+#ifndef INCLUDED_C_ARENA_H
+#define INCLUDED_C_ARENA_H
+
+#ifndef INCLUDED_C_TYPES_H
+#include <c_Types.h>
+#endif /*INCLUDED_C_TYPES_H*/
+
+#ifndef INCLUDED_C_ALIGNMENT_H
+#include <c_Alignment.h>
+#endif /*INCLUDED_C_ALIGNMENT_H*/
+
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct c_Arena_s c_Arena_t;
+struct c_Arena_s {
+    unsigned char *buf;
+    c_size_t         buf_len;
+    c_size_t         prev_offset; // This will be useful for later on
+    c_size_t         curr_offset;
+};
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+C_STATIC_FORCE_INLINE
+void c_Arena_Init(c_Arena_t *a, void *backing_buffer, size_t backing_buffer_length) {
+    a->buf = (unsigned char *)backing_buffer;
+    a->buf_len = backing_buffer_length;
+    a->curr_offset = 0;
+    a->prev_offset = 0;
+}
+
+C_STATIC_FORCE_INLINE
+void c_Arena_Destroy(c_Arena_t *a) {
+    a->curr_offset = 0;
+    a->prev_offset = 0;
+}
+
+C_STATIC_FORCE_INLINE
+void c_Arena_Free(c_Arena_t *a, void *ptr) {
+    C_UNUSED(a);
+    C_UNUSED(ptr);
+}
+
+void *c_Arena_Alloc(c_Arena_t *a, c_size_t size);
+
+void *c_Arena_Resize(c_Arena_t *a, void *old_memory, size_t old_size, size_t new_size);
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct c_ArenaTemp_s c_ArenaTemp_t;
+struct c_ArenaTemp_s {
+    c_Arena_t *arena;
+    size_t prev_offset;
+    size_t curr_offset;
+};
+
+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->curr_offset;
+    return temp;
+}
+
+C_STATIC_FORCE_INLINE
+void c_ArenaTemp_End(c_ArenaTemp_t temp) {
+    temp.arena->prev_offset = temp.prev_offset;
+    temp.arena->curr_offset = temp.curr_offset;
+}
+
+#endif /*INCLUDED_C_ARENA_H*/