#include <u.h>#include <libc.h>#include <auth.h>#include <fcall.h>#include <thread.h>#include "9p.h"#include "impl.h" static voidincreqref(void *v){	Req *r; 	r = v;	if(r)		incref(&r->ref);} Req*allocreq(Reqpool *pool, ulong tag){	Req *r; 	if((r = mallocz(sizeof *r, 1)) == nil)		return nil; 	r->tag = tag;	r->pool = pool; 	incref(&r->ref);	if(caninsertkey(pool->map, tag, r) == 0){		closereq(r);		return nil;	} if(lib9p_chatty)	fprint(2,"allocreq %p tag %lud\n", r, tag);	return r;} intclosereq(Req *r){	int n; 	if((n = decref(&r->ref)) == 0){		free(r->buf);		free(r->rbuf);		free(r);	}if(lib9p_chatty)	fprint(2,"closereq %p: %lud refs\n", r, n ? r->ref.ref : n);	return n;} voidfreereq(Req *r){	int tag;	Req *nr; 	if(r == nil)		return; 	lock(&r->taglock);	tag = r->tag;	r->tag = -1;	unlock(&r->taglock);	if(tag == -1)		return; 	nr = deletekey(r->pool->map, tag);	if(nr == 0){		closereq(r);		return;	} if(r != nr)	fprint(2, "r %p nr %p\n", r, nr); 	assert(r == nr); 	if(closereq(r) == 0)	/* intmap reference */		abort();	closereq(r);} Req*lookupreq(Reqpool *pool, ulong req){	return lookupkey(pool->map, req);} Reqpool*allocreqpool(void){	Reqpool *f; 	if((f = mallocz(sizeof *f, 1)) == nil)		return nil;	if((f->map = allocmap(increqref)) == nil){		free(f);		return nil;	}	return f;}