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    /* Add call to list of dispatched calls */
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    /* Add call to list of dispatched calls */
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    list_append(&call->list, &dispatched_calls);
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    list_append(&call->list, &dispatched_calls);
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}
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}
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/** Send answer to a received call */
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/** Send a fast answer to a received call.
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 *
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 * The fast answer makes use of passing retval and first two arguments in registers.
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 * If you need to return more, use the ipc_answer() instead.
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 *
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 * @param callid ID of the call being answered.
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 * @param retval Return value.
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 * @param arg1 First return argument.
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 * @param arg2 Second return argument.
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 *
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 * @return Zero on success or a value from @ref errno.h on failure.
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 */
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ipcarg_t ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1,
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ipcarg_t ipc_answer_fast(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1,
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        ipcarg_t arg2)
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        ipcarg_t arg2)
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{
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{
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    return __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2);
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    return __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2);
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}
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}
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/** Send a full answer to a received call.
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 *
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 * @param callid ID of the call being answered.
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 * @param call Call data. Must be already initialized by the responder.
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 *
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 * @return Zero on success or a value from @ref errno.h on failure.
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 */
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ipcarg_t ipc_answer(ipc_callid_t callid, ipc_call_t *call)
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{
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    return __SYSCALL2(SYS_IPC_ANSWER, callid, (sysarg_t) call);
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}
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/** Try to dispatch queed calls from async queue */
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/** Try to dispatch queed calls from async queue */
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static void try_dispatch_queued_calls(void)
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static void try_dispatch_queued_calls(void)
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{
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{
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    async_call_t *call;
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    async_call_t *call;
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    ipc_callid_t callid;
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    ipc_callid_t callid;