NAME

t_free - free a library structure

SYNOPSIS

#include <xti.h>

int t_free(
    void *ptr,
    int struct_type)

DESCRIPTION

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().

VALID STATES

ALL - apart from T_UNINIT

ERRORS

On failure, t_errno is set to the following:

[TNOSTRUCTYPE]

Unsupported struct_type requested.

[TPROTO]

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).

[TSYSERR]

A system error has occurred during execution of this function.

RETURN VALUE

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.

SEE ALSO

t_alloc().

CHANGE HISTORY

Issue 4

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