tt_message_context_xval(library call) tt_message_context_xval(library call)
NAME
tt_message_context_xval -- retrieve and deserialize the data from a message's context
SYNOPSIS
#include <Tt/tt_c.h>
Tt_status tt_message_context_xval(
Tt_message m,
const char *slotname,
xdrproc_t xdr_proc,
void **value);
DESCRIPTION
The tt_message_context_xval function retrieves and deserializes the data from a message's context.
The m argument is the opaque handle for the message involved in this operation. The slotname argument describes the context of this mes-
sage. The xdr_proc argument points to the XDR procedure to be used to deserialize the data in the nth argument into newly allocated stor-
age, the address of which will be stored in the pointer whose address is value.
The value argument is the data to be deserialized.
RETURN VALUE
Upon successful completion, the tt_message_context_xval function returns the status of the operation as one of the following Tt_status val-
ues:
TT_OK The operation completed successfully.
TT_ERR_MODE
The specified Tt_mode is invalid.
TT_ERR_NOMP
The ttsession(1) process is not running and the ToolTalk service cannot restart it.
TT_ERR_POINTER
The pointer passed does not point to an object of the correct type for this operation.
TT_ERR_NUM
The integer value passed was invalid (out of range).
TT_ERR_XDR
The XDR procedure failed on the given data, or evaluated to a zero-length expression.
APPLICATION USAGE
The allocation calls are made by the XDR procedure; therefore, any storage allocated is not allocated from the ToolTalk allocation stack.
The application should use the xdr_free(3) call to free this storage.
SEE ALSO
Tt/tt_c.h - Tttt_c(5)
tt_message_context_xval(library call)
