void MVM_cross_thread_write_instrument(MVMThreadContext *tc, MVMStaticFrame *static_frame);

void MVM_cross_thread_write_check(MVMThreadContext *tc, MVMObject *written, MVMint16 guilty);

/* Mutating operations one thread may do on an object it didn't create. */

#define MVM_CTW_BIND_ATTR       1

#define MVM_CTW_BIND_POS        2

#define MVM_CTW_PUSH            3

#define MVM_CTW_POP             4

#define MVM_CTW_SHIFT           5

#define MVM_CTW_UNSHIFT         6

#define MVM_CTW_SLICE           7

#define MVM_CTW_SPLICE          8

#define MVM_CTW_BIND_KEY        9

#define MVM_CTW_DELETE_KEY      10

#define MVM_CTW_ASSIGN          11

#define MVM_CTW_REBLESS         12