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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_vm.h"
#include "global.h"
#include "module.h"
#define MODULE_SIZE 50
#define MODULE_LIMIT (64*1024)
static IndexTable module_table;
/*
* SMP note: We don't need to look accesses to the module table because
* there is one only scheduler thread when we update it.
*/
#include "erl_smp.h"
void module_info(int to, void *to_arg)
{
index_info(to, to_arg, &module_table);
}
static HashValue module_hash(Module* x)
{
return (HashValue) x->module;
}
static int module_cmp(Module* tmpl, Module* obj)
{
return tmpl->module != obj->module;
}
static Module* module_alloc(Module* tmpl)
{
Module* obj = (Module*) erts_alloc(ERTS_ALC_T_MODULE, sizeof(Module));
obj->module = tmpl->module;
obj->curr.code = 0;
obj->old.code = 0;
obj->curr.code_length = 0;
obj->old.code_length = 0;
obj->slot.index = -1;
obj->curr.nif = NULL;
obj->old.nif = NULL;
return obj;
}
void init_module_table(void)
{
HashFunctions f;
f.hash = (H_FUN) module_hash;
f.cmp = (HCMP_FUN) module_cmp;
f.alloc = (HALLOC_FUN) module_alloc;
f.free = 0;
erts_index_init(ERTS_ALC_T_MODULE_TABLE, &module_table, "module_code",
MODULE_SIZE, MODULE_LIMIT, f);
}
Module*
erts_get_module(Eterm mod)
{
Module e;
int index;
ASSERT(is_atom(mod));
e.module = atom_val(mod);
index = index_get(&module_table, (void*) &e);
if (index == -1) {
return NULL;
} else {
return (Module*) erts_index_lookup(&module_table, index);
}
}
Module*
erts_put_module(Eterm mod)
{
Module e;
int index;
ASSERT(is_atom(mod));
ERTS_SMP_LC_ASSERT(erts_initialized == 0
|| erts_smp_thr_progress_is_blocking());
e.module = atom_val(mod);
index = index_put(&module_table, (void*) &e);
return (Module*) erts_index_lookup(&module_table, index);
}
Module *module_code(int i)
{
return (Module*) erts_index_lookup(&module_table, i);
}
int module_code_size(void)
{
return module_table.entries;
}
int module_table_sz(void)
{
return index_table_sz(&module_table);
}
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