tcbdealloc.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 76 行

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date	97.09.21.19.30.11;	author dls;	state Dist;
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date	94.01.14.04.11.50;	author dls;	state v2e1;
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@/* tcbdealloc.c - tcbdealloc */

#include <conf.h>
#include <kernel.h>
#include <network.h>

/*------------------------------------------------------------------------
 *  tcbdealloc - deallocate a TCB and free its resources
 *	ASSUMES ptcb->tcb_mutex HELD
 *------------------------------------------------------------------------
 */
int tcbdealloc(ptcb)
struct 	tcb	*ptcb;
{
	if (ptcb->tcb_state == TCPS_FREE)
		return OK;
	switch (ptcb->tcb_type) {
	case TCPT_CONNECTION:
		tcpkilltimers(ptcb);
		sdelete(ptcb->tcb_ocsem);
		sdelete(ptcb->tcb_ssema);
		sdelete(ptcb->tcb_rsema);
		freemem(ptcb->tcb_sndbuf, ptcb->tcb_sbsize);
		freemem(ptcb->tcb_rcvbuf, ptcb->tcb_rbsize);
		if (ptcb->tcb_rsegq >= 0)
			freeq(ptcb->tcb_rsegq);
		break;
	case TCPT_SERVER:
		pdelete(ptcb->tcb_listenq, 0);
		break;
	default:
		signal(ptcb->tcb_mutex);
		return SYSERR;
	}
	ptcb->tcb_state = TCPS_FREE;
	sdelete(ptcb->tcb_mutex);
	return OK;
}
@


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