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/* Copyright (c) 2010-2012, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "lua_common.h"
#include "mem_pool.h"
/* Public prototypes */
struct memory_pool_s *lua_check_mempool (lua_State * L);
gint luaopen_mempool (lua_State * L);
/* Lua bindings */
LUA_FUNCTION_DEF (mempool, create);
LUA_FUNCTION_DEF (mempool, memory_pool_add_destructor);
LUA_FUNCTION_DEF (mempool, memory_pool_delete);
LUA_FUNCTION_DEF (mempool, memory_pool_stat);
LUA_FUNCTION_DEF (mempool, memory_pool_get_size);
LUA_FUNCTION_DEF (mempool, memory_pool_set_variable);
LUA_FUNCTION_DEF (mempool, memory_pool_get_variable);
static const struct luaL_reg mempoollib_m[] = {
LUA_INTERFACE_DEF (mempool, memory_pool_add_destructor),
LUA_INTERFACE_DEF (mempool, memory_pool_stat),
LUA_INTERFACE_DEF (mempool, memory_pool_get_size),
LUA_INTERFACE_DEF (mempool, memory_pool_set_variable),
LUA_INTERFACE_DEF (mempool, memory_pool_get_variable),
{"__gc", lua_mempool_memory_pool_delete},
{"__tostring", lua_class_tostring},
{NULL, NULL}
};
static const struct luaL_reg mempoollib_f[] = {
LUA_INTERFACE_DEF (mempool, create),
{NULL, NULL}
};
/*
* Struct for lua destructor
*/
struct lua_mempool_udata {
lua_State *L;
gint cbref;
memory_pool_t *mempool;
};
struct memory_pool_s *
lua_check_mempool (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{mempool}");
luaL_argcheck (L, ud != NULL, 1, "'mempool' expected");
return ud ? *((struct memory_pool_s **)ud) : NULL;
}
static int
lua_mempool_create (lua_State *L)
{
struct memory_pool_s *mempool = memory_pool_new (memory_pool_get_size ()), **pmempool;
if (mempool) {
pmempool = lua_newuserdata (L, sizeof (struct memory_pool_s *));
lua_setclass (L, "rspamd{mempool}", -1);
*pmempool = mempool;
}
else {
lua_pushnil (L);
}
return 1;
}
static void
lua_mempool_destructor_func (gpointer p)
{
struct lua_mempool_udata *ud = p;
gboolean need_unlock = FALSE;
/* Avoid LOR here as mutex can be acquired before in lua_call */
if (g_mutex_trylock (lua_mtx)) {
need_unlock = TRUE;
}
lua_rawgeti (ud->L, LUA_REGISTRYINDEX, ud->cbref);
if (lua_pcall (ud->L, 0, 0, 0) != 0) {
msg_info ("call to destructor failed: %s", lua_tostring (ud->L, -1));
}
luaL_unref (ud->L, LUA_REGISTRYINDEX, ud->cbref);
if (need_unlock) {
g_mutex_unlock (lua_mtx);
}
}
static int
lua_mempool_memory_pool_add_destructor (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
struct lua_mempool_udata *ud;
if (mempool) {
if (lua_isfunction (L, 2)) {
ud = memory_pool_alloc (mempool, sizeof (struct lua_mempool_udata));
lua_pushvalue (L, 2);
/* Get a reference */
ud->cbref = luaL_ref (L, LUA_REGISTRYINDEX);
ud->L = L;
ud->mempool = mempool;
memory_pool_add_destructor (mempool, lua_mempool_destructor_func, ud);
}
else {
msg_err ("trying to add destructor without function");
}
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_mempool_memory_pool_delete (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
if (mempool) {
memory_pool_delete (mempool);
return 0;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_mempool_memory_pool_stat (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
if (mempool) {
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_mempool_memory_pool_get_size (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
if (mempool) {
lua_pushinteger (L, memory_pool_get_size ());
return 0;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_mempool_memory_pool_set_variable (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
const gchar *var = luaL_checkstring (L, 2),
*value = luaL_checkstring (L, 3);
if (mempool && var && value) {
memory_pool_set_variable (mempool, var, memory_pool_strdup (mempool, value), NULL);
return 0;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_mempool_memory_pool_get_variable (lua_State *L)
{
struct memory_pool_s *mempool = lua_check_mempool (L);
const gchar *var = luaL_checkstring (L, 2);
gchar *value;
if (mempool && var) {
value = memory_pool_get_variable (mempool, var);
if (value) {
lua_pushstring (L, value);
}
else {
lua_pushnil (L);
}
}
else {
lua_pushnil (L);
}
return 1;
}
gint
luaopen_mempool (lua_State * L)
{
luaL_newmetatable (L, "rspamd{mempool}");
lua_pushstring (L, "__index");
lua_pushvalue (L, -2);
lua_settable (L, -3);
lua_pushstring (L, "class");
lua_pushstring (L, "rspamd{mempool}");
lua_rawset (L, -3);
luaL_openlib (L, NULL, mempoollib_m, 0);
luaL_openlib(L, "rspamd_mempool", mempoollib_f, 0);
lua_pop (L, 1); /* remove metatable from stack */
return 1;
}
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