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All Rights Reserved. .\" Portions Copyright (c) 1998, Sun Microsystems, Inc. All Rights Reserved .\" .TH T_FREE 3NSL "May 7, 1998" .SH NAME t_free \- free a library structure .SH SYNOPSIS .LP .nf #include \fBint\fR \fBt_free\fR(\fBvoid *\fR\fIptr\fR, \fBint\fR \fIstruct_type\fR); .fi .SH DESCRIPTION .sp .LP This routine is part of the \fBXTI\fR interfaces which evolved from the \fBTLI\fR interfaces. \fBXTI\fR represents the future evolution of these interfaces. However, \fBTLI\fR interfaces are supported for compatibility. When using a \fBTLI\fR routine that has the same name as an \fBXTI\fR routine, the \fBtiuser.h\fR header file must be used. Refer to the \fBTLI\fR \fBCOMPATIBILITY\fR section for a description of differences between the two interfaces. .sp .LP The \fBt_free()\fR function frees memory previously allocated by \fBt_alloc\fR(3NSL). This function will free memory for the specified structure, and will also free memory for buffers referenced by the structure. .sp .LP The argument \fIptr\fR points to one of the seven structure types described for \fBt_alloc\fR(3NSL), and \fIstruct_type\fR identifies the type of that structure which must be one of the following: .sp .in +2 .nf T_BIND struct t_bind T_CALL struct t_call T_OPTMGMT struct t_optmgmt T_DIS struct t_discon T_UNITDATA struct t_unitdata T_UDERROR struct t_uderr T_INFO struct t_info .fi .in -2 .sp .LP where each of these structures is used as an argument to one or more transport functions. .sp .LP The function \fBt_free()\fR will check the \fIaddr\fR, \fIopt\fR and \fIudata\fR fields of the given structure, as appropriate, and free the buffers pointed to by the \fIbuf\fR field of the \fBnetbuf\fR structure. If \fIbuf\fR is a null pointer, \fBt_free()\fR will not attempt to free memory. After all buffers are freed, \fBt_free()\fR will free the memory associated with the structure pointed to by \fIptr\fR. .sp .LP Undefined results will occur if \fIptr\fR or any of the \fIbuf\fR pointers points to a block of memory that was not previously allocated by \fBt_alloc\fR(3NSL). .SH RETURN VALUES .sp .LP Upon successful completion, a value of \fB0\fR is returned. Otherwise, a value of -1 is returned and \fBt_errno\fR is set to indicate an error. .SH VALID STATES .sp .LP ALL - apart from \fBT_UNINIT\fR. .SH ERRORS .sp .LP On failure, \fBt_errno\fR is set to the following: .sp .ne 2 .na \fB\fBTNOSTRUCTYPE\fR\fR .ad .RS 16n Unsupported \fIstruct_type\fR requested. .RE .sp .ne 2 .na \fB\fBTPROTO\fR\fR .ad .RS 16n This error indicates that a communication problem has been detected between XTI and the transport provider for which there is no other suitable XTI error \fI(t_errno)\fR. .RE .sp .ne 2 .na \fB\fBTSYSERR\fR\fR .ad .RS 16n A system error has occurred during execution of this function. .RE .SH TLI COMPATIBILITY .sp .LP The \fBXTI\fR and \fBTLI\fR interface definitions have common names but use different header files. This, and other semantic differences between the two interfaces are described in the subsections below. .SS "Interface Header" .sp .LP The \fBXTI\fR interfaces use the header file, \fBxti.h\fR. \fBTLI\fR interfaces should \fInot\fR use this header. They should use the header: .sp .in +2 .nf #include .fi .in -2 .SS "Error Description Values" .sp .LP The \fBt_errno\fR value that can be set by the \fBXTI\fR interface and cannot be set by the \fBTLI\fR interface is: .sp .ne 2 .na \fB\fBTPROTO\fR \fR .ad .RS 11n .RE .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .sp .TS box; c | c l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE _ MT Level Safe .TE .SH SEE ALSO .sp .LP .BR t_alloc (3NSL), .BR attributes (7)