feat(core): 添加 command 定义及 command_buffer 维护功能

src/core/command_buffer.c

@@ -0,0 +1,23 @@
+#include "core/command_buffer.h"
+
+#include "base/array.h"
+#include "base/memory.h"
+#include "core/command.h"
+
+void command_buffer_reset(command_buffer_t *buffer) {
+  if (!buffer->items || !buffer->capacity) return;
+
+  p_clear(buffer->items, buffer->capacity);
+  buffer->count = 0;
+}
+
+void command_buffer_cleanup(command_buffer_t *buffer) {
+  p_delete(&buffer->items);
+  buffer->count = 0;
+  buffer->capacity = 0;
+}
+
+void command_buffer_push(command_buffer_t *buffer, const command_t *command) {
+  command_t *cmd = array_push(buffer->items, buffer->count, buffer->capacity);
+  *cmd = *command;
+}