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#ifndef INCLUDES_TARANTOOL_LUA_H
#define INCLUDES_TARANTOOL_LUA_H
/*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. 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 BY <COPYRIGHT HOLDER> ``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
* <COPYRIGHT HOLDER> OR CONTRIBUTORS 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 <stddef.h>
#include <inttypes.h>
struct lua_State;
struct luaL_Reg;
struct tarantool_cfg;
struct tbuf;
/*
* Single global lua_State shared by core and modules.
* Created with tarantool_lua_init().
*/
extern struct lua_State *tarantool_L;
/**
* This is a callback used by tarantool_lua_init() to open
* module-specific libraries into given Lua state.
*
* No return value, panics if error.
*/
void
mod_lua_init(struct lua_State *L);
void
tarantool_lua_register_type(struct lua_State *L, const char *type_name,
const struct luaL_Reg *methods);
/**
* Create an instance of Lua interpreter and load it with
* Tarantool modules. Creates a Lua state, imports global
* Tarantool modules, then calls mod_lua_init(), which performs
* module-specific imports. The created state can be freed as any
* other, with lua_close().
*
* @return L on success, 0 if out of memory
*/
struct lua_State *
tarantool_lua_init();
void
tarantool_lua_close(struct lua_State *L);
/**
* This function exists because lua_tostring does not use
* __tostring metamethod, and this metamethod has to be used
* if we want to print Lua userdata correctly.
*/
const char *
tarantool_lua_tostring(struct lua_State *L, int index);
/**
* Convert Lua string, number or cdata (u64) to 64bit value
*/
uint64_t
tarantool_lua_tointeger64(struct lua_State *L, int idx);
/**
* Make a new configuration available in Lua
*/
void
tarantool_lua_load_cfg(struct lua_State *L,
struct tarantool_cfg *cfg);
/**
* Load and execute start-up file
*
* @param L is a Lua State.
*/
void
tarantool_lua_load_init_script(struct lua_State *L);
void
tarantool_lua(struct lua_State *L,
struct tbuf *out, const char *str);
/**
* push uint64_t to Lua stack
*
* @param L is a Lua State
* @param val is a value to push
*
*/
int luaL_pushnumber64(struct lua_State *L, uint64_t val);
/**
* show plugin statistics (for admin port)
*/
struct tbuf;
void show_plugins_stat(struct tbuf *out);
/**
* @brief A palloc-like wrapper to allocate memory using lua_newuserdata
* @param ctx lua_State
* @param size a number of bytes to allocate
* @return a pointer to the allocated memory
*/
void *
lua_region_alloc(void *ctx, size_t size);
#endif /* INCLUDES_TARANTOOL_LUA_H */
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