You are here: SwitchKit Programmer’s Guide > 7 Message Functions > sk_packAutoStorage()
Description
The sk_packAutoStorage() function converts the message into a sequence of bytes suitable for sending to the LLC. This function is equivalent to sk_packMessage(), except that instead of requiring you to pass in a pre-allocated buffer, it automatically allocates an appropriate buffer with sufficient storage for the given message.
int sk_packAutoStorage(MsgStruct *aMsgStruct, char **BufferPtr, int *aBufSize);
The function parameters are shown in the table below.
|
Argument |
Description |
|---|---|
|
MsgStruct **m |
Pointer to a generic C Structure representing a message. |
|
aBufferPtr |
Pointer to a packed message pointing to memory allocated and owned by SwitchKit API. Application wishing to retain this information beyond the next call to a SwitchKit API function should copy the data to memory allocated and controlled by the application as the memory may be reused the next time a SwitchKit API function is called. |
|
aBufSize |
Size of the packed message. |
Possible return values for this function:
|
SK_LOST_LLC |
This return value indicates that your application lost contact with the LLC. |
|
SK_UNKNOWN_MSG_TYPE |
The tag field of this MsgStruct is invalid. Did you call sk_initMsg()? |
|
SK_BAD_MSG_ |
The size field computed by SwitchKit does not match the size field set through sk_setMsgSize(). For this message, you should not set the message size, and instead should let SwitchKit compute it automatically. |
|
SK_NO_MSG_ |
For this MsgStruct, no size was set in with sk_setMsgSize(), and its size couldn’t be computed. |