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/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* PostGIS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright 2020 Raúl Marín
*
**********************************************************************/
#include "lwgeom_cache.h"
SHARED_GSERIALIZED *
shared_gserialized_new_nocache(Datum d)
{
SHARED_GSERIALIZED *s = palloc(sizeof(SHARED_GSERIALIZED));
s->count = 0;
s->geom = (GSERIALIZED *)PG_DETOAST_DATUM(d);
return s;
}
SHARED_GSERIALIZED *
shared_gserialized_new_cached(FunctionCallInfo fcinfo, Datum d)
{
SHARED_GSERIALIZED *s = MemoryContextAlloc(PostgisCacheContext(fcinfo), sizeof(SHARED_GSERIALIZED));
MemoryContext old_context = MemoryContextSwitchTo(PostgisCacheContext(fcinfo));
s->geom = (GSERIALIZED *)PG_DETOAST_DATUM_COPY(d);
MemoryContextSwitchTo(old_context);
s->count = 1;
return s;
}
SHARED_GSERIALIZED *
shared_gserialized_ref(FunctionCallInfo fcinfo, SHARED_GSERIALIZED *ref)
{
#if POSTGIS_PGSQL_VERSION >= 160
/** MemoryContextContains was removed in PG16 **/
if ( PostgisCacheContext(fcinfo) == GetMemoryChunkContext(ref) )
#else
if (MemoryContextContains(PostgisCacheContext(fcinfo), ref))
#endif
{
ref->count++;
return ref;
}
else
{
SHARED_GSERIALIZED *sg = MemoryContextAlloc(PostgisCacheContext(fcinfo), sizeof(SHARED_GSERIALIZED));
sg->count = 1;
sg->geom = MemoryContextAlloc(PostgisCacheContext(fcinfo), VARSIZE(ref->geom));
memcpy(sg->geom, ref->geom, VARSIZE(ref->geom));
return sg;
}
}
void
shared_gserialized_unref(FunctionCallInfo fcinfo, SHARED_GSERIALIZED *ref)
{
#if POSTGIS_PGSQL_VERSION >= 160
/** MemoryContextContains was removed in PG16 **/
if ( PostgisCacheContext(fcinfo) == GetMemoryChunkContext(ref) )
#else
if (MemoryContextContains(PostgisCacheContext(fcinfo), ref))
#endif
{
ref->count--;
if (!ref->count)
{
pfree(ref->geom);
pfree(ref);
}
}
else
{
pfree(ref->geom);
pfree(ref);
}
}
bool
shared_gserialized_equal(SHARED_GSERIALIZED *r1, SHARED_GSERIALIZED *r2)
{
if (r1->geom == r2->geom)
return true;
if (VARSIZE(r1->geom) != VARSIZE(r2->geom))
return false;
return memcmp(r1->geom, r2->geom, VARSIZE(r1->geom)) == 0;
}
const GSERIALIZED *
shared_gserialized_get(SHARED_GSERIALIZED *s)
{
return s->geom;
}
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