40 lines
884 B
C
40 lines
884 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <bio.h>
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#include <ndb.h>
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/* remove a from t and free it */
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Ndbtuple*
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ndbdiscard(Ndbtuple *t, Ndbtuple *a)
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{
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Ndbtuple *nt;
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/* unchain a */
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for(nt = t; nt != nil; nt = nt->entry){
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if(nt->line == a)
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nt->line = a->line;
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if(nt->entry == a)
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nt->entry = a->entry;
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}
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/* a may be start of chain */
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if(t == a)
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t = a->entry;
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/* free a */
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a->entry = nil;
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ndbfree(a);
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ndbsetmalloctag(t, getcallerpc());
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return t;
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}
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