jehanne/sys/src/lib/9p/fid.c

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#include <u.h>
#include <lib9.h>
#include <auth.h>
#include <9P2000.h>
#include <thread.h>
#include "9p.h"
static void
incfidref(void *v)
{
Fid *f;
f = v;
if(f)
incref(&f->ref);
}
Fidpool*
allocfidpool(void (*destroy)(Fid*))
{
Fidpool *f;
f = emalloc9p(sizeof *f);
f->map = allocmap(incfidref);
f->destroy = destroy;
return f;
}
void
freefidpool(Fidpool *p)
{
freemap(p->map, (void(*)(void*))p->destroy);
free(p);
}
Fid*
allocfid(Fidpool *pool, uint32_t fid)
{
Fid *f;
f = emalloc9p(sizeof *f);
f->fid = fid;
f->omode = -1;
f->pool = pool;
incfidref(f);
incfidref(f);
if(caninsertkey(pool->map, fid, f) == 0){
closefid(f);
closefid(f);
return nil;
}
return f;
}
Fid*
lookupfid(Fidpool *pool, uint32_t fid)
{
return lookupkey(pool->map, fid);
}
void
closefid(Fid *f)
{
if(decref(&f->ref) == 0) {
if(f->rdir)
closedirfile(f->rdir);
if(f->pool->destroy)
f->pool->destroy(f);
if(f->file)
closefile(f->file);
free(f->uid);
free(f);
}
}
Fid*
removefid(Fidpool *pool, uint32_t fid)
{
return deletekey(pool->map, fid);
}