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Technical Standard: Networking Services (XNS), Issue 5.2 Draft 2.0
Copyright © 1999 The Open Group


t_free - free a library structure


#include <xti.h>

int t_free(void *ptr, int struct_type);


Parameters Before call After call

ptr x /
struct_type x /

The t_free() function frees memory previously allocated by t_alloc(). This function will free memory for the specified structure, and will also free memory for buffers referenced by the structure.

The argument ptr points to one of the seven structure types described for t_alloc(), and struct_type identifies the type of that structure which must be one of the following:

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

where each of these structures is used as an argument to one or more transport functions.

The function t_free() will check the addr, opt and udata fields of the given structure (as appropriate) and free the buffers pointed to by the buf field of the netbuf structure. If buf is a null pointer, t_free() will not attempt to free memory. After all buffers are freed, t_free() will free the memory associated with the structure pointed to by ptr.

Undefined results will occur if ptr or any of the buf pointers points to a block of memory that was not previously allocated by t_alloc().


ALL - apart from T_UNINIT


On failure, t_errno is set to the following:

Unsupported struct_type requested.

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 (t_errno).

A system error has occurred during execution of this function.


Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and t_errno is set to indicate an error.




Issue 4

The SYNOPSIS section is placed in the form of a standard C function prototype.

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