text: #ifndef __COCTX_SWAP_H__
  #define __COCTX_SWAP_H__
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  struct coctx_t;
  void ctx_swap(coctx_t* cur_ctx, coctx_t* new_ctx);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif // __COCTX_SWAP_H__
  