lua.cpp File Reference

Functions
static Heap	userHeap (luaUserHeap)
static void	printLuaMemoryInfo ()
static void *	myAlloc (void *, void *ptr, size_t osize, size_t nsize)
static int	lua_setTickRate (lua_State *l)
static void	loadLibraries (LuaHandle &ls)
static LuaHandle	setupLuaState (lua_Alloc alloc)
static bool	loadScript (LuaHandle &ls, const char *scriptStr)
static void	doInteractive (LuaHandle &ls)
static void	invokeTick (LuaHandle &ls)
static void	resetLua ()
static bool	runOneLua (lua_Alloc alloc, const char *script)
void	startLua ()
static LuaHandle	runScript (const char *script)
expected< float >	testLuaReturnsNumberOrNil (const char *script)
float	testLuaReturnsNumber (const char *script)
int	testLuaReturnsInteger (const char *script)
void	testLuaExecString (const char *script)
float	strtof_rusefi (const char *str, char **endPtr)

Variables
static bool	withErrorLoading = false
static char luaUserHeap[LUA_USER_HEAP] SDRAM_OPTIONAL	LUA_HEAD_RAM_SECTION
static int	recentRxCount = 0
static int	totalRxCount = 0
static int	rxTime
static int	luaTickPeriodUs
static bool	interactivePending = false
static char	interactiveCmd [100]
static bool	needsReset = false
static LuaThread	luaThread

Function Documentation

doInteractive()

static void doInteractive ( LuaHandle &  ls )

static

Definition at line 236 of file lua.cpp.

                                         {
    if (!interactivePending) {
        // no cmd pending, return
        return;
    }
 
    auto status = luaL_dostring(ls, interactiveCmd);
 
    if (0 == status) {
        // Function call was OK, resolve return value and print it
        if (lua_isinteger(ls, -1)) {
            efiPrintf(TAG "interactive returned integer: %d", lua_tointeger(ls, -1));
        } else if (lua_isnumber(ls, -1)) {
            efiPrintf(TAG "interactive returned number: %f", lua_tonumber(ls, -1));
        } else if (lua_isstring(ls, -1)) {
            efiPrintf(TAG "interactive returned string: '%s'", lua_tostring(ls, -1));
        } else if (lua_isboolean(ls, -1)) {
            efiPrintf(TAG "interactive returned bool: %s", lua_toboolean(ls, -1) ? "true" : "false");
        } else if (lua_isnil(ls, -1)) {
            efiPrintf(TAG "interactive returned nil.");
        } else {
            efiPrintf(TAG "interactive returned nothing.");
        }
    } else {
        // error with interactive command, print it
        efiPrintf(TAG "interactive error: %s", lua_tostring(ls, -1));
    }
 
    interactivePending = false;
 
    lua_settop(ls, 0);
}

Referenced by runOneLua().

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invokeTick()

static void invokeTick ( LuaHandle &  ls )

static

Definition at line 269 of file lua.cpp.

                                      {
    ScopePerf perf(PE::LuaTickFunction);
 
    // run the tick function
    lua_getglobal(ls, "onTick");
    if (lua_isnil(ls, -1)) {
        // TODO: handle missing tick function
        lua_settop(ls, 0);
        return;
    }
 
    int status = lua_pcall(ls, 0, 0, 0);
 
    if (0 != status) {
        // error calling hook function
        auto errMsg = lua_tostring(ls, -1);
        efiPrintf(TAG "error %s", errMsg);
        lua_pop(ls, 1);
    }
 
    lua_settop(ls, 0);
}

Referenced by runOneLua().

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loadLibraries()

static void loadLibraries ( LuaHandle &  ls )

static

Definition at line 165 of file lua.cpp.

                                         {
    constexpr luaL_Reg libs[] = {
        // TODO: do we even need the base lib?
        //{ LUA_GNAME, luaopen_base },
        { LUA_MATHLIBNAME, luaopen_math },
    };
 
    for (size_t i = 0; i < efi::size(libs); i++) {
        luaL_requiref(ls, libs[i].name, libs[i].func, 1);
        lua_pop(ls, 1);
    }
}

Referenced by setupLuaState().

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loadScript()

static bool loadScript ( LuaHandle &  ls, const char *  scriptStr  )

static

Definition at line 213 of file lua.cpp.

                                                             {
    efiPrintf(TAG "loading script length: %lu...", efiStrlen(scriptStr));
 
    if (0 != luaL_dostring(ls, scriptStr)) {
      withErrorLoading = true;
        efiPrintf(TAG "ERROR loading script: %s", lua_tostring(ls, -1));
        lua_pop(ls, 1);
        return false;
    }
 
    efiPrintf(TAG "script loaded successfully!");
 
#if EFI_PROD_CODE
    printLuaMemoryInfo();
#endif // EFI_PROD_CODE
 
    return true;
}

Referenced by runOneLua(), runScript(), and testLuaExecString().

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lua_setTickRate()

static int lua_setTickRate ( lua_State *  l )

static

Definition at line 154 of file lua.cpp.

                                         {
    float freq = luaL_checknumber(l, 1);
 
    // For instance BMW does 100 CAN messages per second on some IDs, let's allow at least twice that speed
    // Limit to 1..200 hz
    freq = clampF(1, freq, 200);
 
    luaTickPeriodUs = 1000000.0f / freq;
    return 0;
}

Referenced by setupLuaState().

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myAlloc()

static void * myAlloc ( void *  , void *  ptr, size_t  osize, size_t  nsize  )

static

Definition at line 129 of file lua.cpp.

                                                                     {
    if (engineConfiguration->debugMode == DBG_LUA) {
        engine->outputChannels.debugIntField1 = userHeap.used();
    }
 
    return userHeap.realloc(ptr, osize, nsize);
}

Referenced by runScript(), and testLuaExecString().

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printLuaMemoryInfo()

static void printLuaMemoryInfo ( )

static

Definition at line 122 of file lua.cpp.

                                 {
    auto heapSize = userHeap.size();
    auto memoryUsed = userHeap.used();
    float pct = 100.0f * memoryUsed / heapSize;
    efiPrintf("Lua memory heap usage: %d / %d bytes = %.1f%%", memoryUsed, heapSize, pct);
}

Referenced by loadScript(), and startLua().

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resetLua()

static void resetLua ( )

static

Definition at line 298 of file lua.cpp.

                       {
    engine->module<AcController>().unmock().isDisabledByLua = false;
#if EFI_CAN_SUPPORT
    resetLuaCanRx();
#endif // EFI_CAN_SUPPORT
 
    // De-init pins, they will reinit next start of the script.
    luaDeInitPins();
}

Referenced by runOneLua().

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runOneLua()

static bool runOneLua ( lua_Alloc  alloc, const char *  script  )

static

Definition at line 318 of file lua.cpp.

                                                           {
    needsReset = false;
 
    auto ls = setupLuaState(alloc);
 
    // couldn't start Lua interpreter, bail out
    if (!ls) {
        return false;
    }
 
    // Reset default tick rate
    luaTickPeriodUs = MS2US(100);
 
    if (!loadScript(ls, script)) {
        return false;
    }
 
    while (!needsReset && !chThdShouldTerminateX()) {
        efitick_t beforeNt = getTimeNowNt();
#if EFI_CAN_SUPPORT
        // First, process any pending can RX messages
        totalRxCount += recentRxCount;
        recentRxCount = doLuaCanRx(ls);
        rxTime = getTimeNowNt() - beforeNt;
#endif // EFI_CAN_SUPPORT
 
        // Next, check if there is a pending interactive command entered by the user
        doInteractive(ls);
 
        invokeTick(ls);
 
        engine->outputChannels.luaLastCycleDuration = (getTimeNowNt() - beforeNt);
        engine->outputChannels.luaInvocationCounter++;
        chThdSleep(TIME_US2I(luaTickPeriodUs));
 
        engine->engineState.luaDigitalState0 = getAuxDigital(0);
        engine->engineState.luaDigitalState1 = getAuxDigital(1);
        engine->engineState.luaDigitalState2 = getAuxDigital(2);
        engine->engineState.luaDigitalState3 = getAuxDigital(3);
    }
 
    resetLua();
 
    return true;
}

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runScript()

static LuaHandle runScript ( const char *  script )

static

Definition at line 452 of file lua.cpp.

                                               {
    auto ls = setupLuaState(myAlloc);
 
    if (!ls) {
        throw std::logic_error("Call to setupLuaState failed, returned null");
    }
 
    if (!loadScript(ls, script)) {
        throw std::logic_error("Call to loadScript failed");
    }
 
    lua_getglobal(ls, "testFunc");
    if (lua_isnil(ls, -1)) {
        throw std::logic_error("Failed to find function testFunc");
    }
 
    int status = lua_pcall(ls, 0, 1, 0);
 
    if (0 != status) {
        std::string msg = std::string("lua error while running script: ") + lua_tostring(ls, -1);
        throw std::logic_error(msg);
    }
 
    return ls;
}

Referenced by testLuaReturnsInteger(), testLuaReturnsNumber(), and testLuaReturnsNumberOrNil().

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setupLuaState()

static LuaHandle setupLuaState ( lua_Alloc  alloc )

static

Definition at line 178 of file lua.cpp.

                                                {
    LuaHandle ls = lua_newstate(alloc, NULL);
 
    if (!ls) {
        criticalError("Failed to start Lua interpreter");
 
        return nullptr;
    }
 
    lua_atpanic(ls, [](lua_State* l) {
        criticalError("Lua panic: %s", lua_tostring(l, -1));
 
        // hang the lua thread
        while (true) ;
 
        return 0;
    });
 
    // Load Lua's own libraries
    loadLibraries(ls);
 
    // Load rusEFI hooks
    lua_register(ls, "setTickRate", lua_setTickRate);
    configureRusefiLuaHooks(ls);
 
    // run a GC cycle
    lua_gc(ls, LUA_GCCOLLECT, 0);
 
    // set GC settings
    // see https://www.lua.org/manual/5.4/manual.html#2.5.1
    lua_gc(ls, LUA_GCINC, 50, 1000, 9);
 
    return ls;
}

Referenced by runOneLua(), runScript(), and testLuaExecString().

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startLua()

void startLua

(

)

Definition at line 396 of file lua.cpp.

                {
#if defined(STM32F4) && !defined(EFI_IS_F42x)
    // we need this on microRusEFI for sure
    // definitely should NOT have this on Proteus
    // on Hellen a bit of open question what's the best track
    // cute hack: let's check at runtime if you are a lucky owner of microRusEFI with extra RAM and use that extra RAM for extra Lua
    if (isStm32F42x()) {
        char *buffer = (char *)0x20020000;
        userHeap.reinit(buffer, 60000);
    }
#endif // STM32F4
 
#if LUA_USER_HEAP > 1
#if EFI_CAN_SUPPORT
    initLuaCanRx();
#endif // EFI_CAN_SUPPORT
 
    addConsoleActionII("set_lua_setting", [](int index, int value) {
        engineConfiguration->scriptSetting[index] = value;
    });
 
    luaThread.start();
 
    addConsoleActionS("lua", [](const char* str){
        if (interactivePending) {
            return;
        }
 
        strncpy(interactiveCmd, str, sizeof(interactiveCmd) - 1);
        interactiveCmd[sizeof(interactiveCmd) - 1] = '\0';
 
        interactivePending = true;
    });
 
    addConsoleAction("luareset", [](){
        needsReset = true;
    });
 
    addConsoleAction("luamemory", [](){
      efiPrintf("rx total/recent %d %d", totalRxCount,
        recentRxCount);
      efiPrintf("luaCycle %luus including luaRxTime %dus", NT2US(engine->outputChannels.luaLastCycleDuration),
        NT2US(rxTime));
 
     printLuaMemoryInfo();
  });
#endif
}

Referenced by commonEarlyInit().

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strtof_rusefi()

float strtof_rusefi	(	const char *	str,
		char **	endPtr
	)

Definition at line 536 of file lua.cpp.

                                                               {
    bool afterDecimalPoint = false;
    float div = 1; // Divider to place digits after the decimal point
 
    if (endPtr) {
        *endPtr = const_cast<char*>(str);
    }
 
    float integerPart = 0;
    float fractionalPart = 0;
 
    while (*str != '\0') {
        char c = *str;
        int digitVal = c - '0';
 
        if (c >= '0' && c <= '9') {
            if (!afterDecimalPoint) {
                // Integer part
                integerPart = 10 * integerPart + digitVal;
            } else {
                // Fractional part
                fractionalPart = 10 * fractionalPart + digitVal;
                div *= 10;
            }
        } else if (c == '.') {
            afterDecimalPoint = true;
        } else {
            break;
        }
 
        str++;
 
        if (endPtr) {
            *endPtr = const_cast<char*>(str);
        }
    }
 
    return integerPart + fractionalPart / div;
}

testLuaExecString()

void testLuaExecString

(

const char *

script

)

Definition at line 518 of file lua.cpp.

                                           {
    auto ls = setupLuaState(myAlloc);
 
    if (!ls) {
        throw std::logic_error("Call to setupLuaState failed, returned null");
    }
 
    if (!loadScript(ls, script)) {
        throw std::logic_error("Call to loadScript failed");
    }
}

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testLuaReturnsInteger()

int testLuaReturnsInteger

(

const char *

script

)

Definition at line 507 of file lua.cpp.

                                              {
    auto ls = runScript(script);
 
    // pop the return value;
    if (!lua_isinteger(ls, -1)) {
        throw std::logic_error("Returned value is not an integer");
    }
 
    return lua_tointeger(ls, -1);
}

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testLuaReturnsNumber()

float testLuaReturnsNumber

(

const char *

script

)

Definition at line 495 of file lua.cpp.

                                               {
    auto ls = runScript(script);
 
    // check the return value
    if (!lua_isnumber(ls, -1)) {
        throw new std::logic_error("Returned value is not a number");
    }
 
    // pop the return value
    return lua_tonumber(ls, -1);
}

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testLuaReturnsNumberOrNil()

expected< float > testLuaReturnsNumberOrNil

(

const char *

script

)

Definition at line 478 of file lua.cpp.

                                                              {
    auto ls = runScript(script);
 
    // check nil return first
    if (lua_isnil(ls, -1)) {
        return unexpected;
    }
 
    // If not nil, it should be a number
    if (!lua_isnumber(ls, -1)) {
        throw std::logic_error("Returned value is not a number");
    }
 
    // pop the return value
    return lua_tonumber(ls, -1);
}

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userHeap()

static Heap userHeap ( luaUserHeap  )

static

Referenced by myAlloc(), printLuaMemoryInfo(), and startLua().

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Variable Documentation

interactiveCmd

char interactiveCmd[100]

static

Definition at line 234 of file lua.cpp.

Referenced by doInteractive(), and startLua().

interactivePending

bool interactivePending = false

static

Definition at line 233 of file lua.cpp.

Referenced by doInteractive(), and startLua().

LUA_HEAD_RAM_SECTION

char luaUserHeap [LUA_USER_HEAP] SDRAM_OPTIONAL LUA_HEAD_RAM_SECTION

static

Definition at line 31 of file lua.cpp.

luaThread

LuaThread luaThread

static

Definition at line 393 of file lua.cpp.

Referenced by startLua().

luaTickPeriodUs

int luaTickPeriodUs

static

Definition at line 152 of file lua.cpp.

Referenced by lua_setTickRate(), and runOneLua().

needsReset

bool needsReset = false

static

Definition at line 309 of file lua.cpp.

Referenced by runOneLua(), and startLua().

recentRxCount

int recentRxCount = 0

static

Definition at line 35 of file lua.cpp.

Referenced by runOneLua(), and startLua().

rxTime

int rxTime

static

Definition at line 37 of file lua.cpp.

Referenced by runOneLua(), and startLua().

totalRxCount

int totalRxCount = 0

static

Definition at line 36 of file lua.cpp.

Referenced by runOneLua(), and startLua().

withErrorLoading

bool withErrorLoading = false

static

Definition at line 14 of file lua.cpp.

Referenced by loadScript().

Go to the source code of this file.