Class Thread

src/thread.ts:27–416

const INSTRUCTION_HOOK_COUNT = 1000

export default class Thread {
    public readonly address: LuaState
    public readonly lua: LuaWasm
    protected readonly typeExtensions: OrderedExtension[]
    private closed = false
    private hookFunctionPointer: number | undefined
    private timeout?: number
    private readonly parent?: Thread

    public constructor(lua: LuaWasm, typeExtensions: OrderedExtension[], address: number, parent?: Thread) {
        this.lua = lua
        this.typeExtensions = typeExtensions
        this.address = address
        this.parent = parent
    }

    public newThread(): Thread {
        const address = this.lua.lua_newthread(this.address)
        if (!address) {
            throw new Error('lua_newthread returned a null pointer')
        }
        return new Thread(this.lua, this.typeExtensions, address, this.parent || this)
    }

    public resetThread(): void {
        this.assertOk(this.lua.lua_resetthread(this.address))
    }

    public loadString(luaCode: string, name?: string): void {
        const size = this.lua.module.lengthBytesUTF8(luaCode)
        const pointerSize = size + 1
        const bufferPointer = this.lua.module._malloc(pointerSize)
        try {
            this.lua.module.stringToUTF8(luaCode, bufferPointer, pointerSize)
            this.assertOk(this.lua.luaL_loadbufferx(this.address, bufferPointer, size, name ?? bufferPointer, null))
        } finally {
            this.lua.module._free(bufferPointer)
        }
    }

    public loadFile(filename: string): void {
        this.assertOk(this.lua.luaL_loadfilex(this.address, filename, null))
    }

    public resume(argCount = 0): LuaResumeResult {
        const dataPointer = this.lua.module._malloc(PointerSize)
        try {
            this.lua.module.setValue(dataPointer, 0, 'i32')
            const luaResult = this.lua.lua_resume(this.address, null, argCount, dataPointer)
            return {
                result: luaResult,
                resultCount: this.lua.module.getValue(dataPointer, 'i32'),
            }
        } finally {
            this.lua.module._free(dataPointer)
        }
    }