HcrProcGetter = proc (libHandle: pointer; procName: cstring): pointer {...}{.nimcall.}

HcrModuleInitializer = proc () {...}{.nimcall.}

proc hcrRegisterProc(module: cstring; name: cstring; fn: pointer): pointer {...}{.
    compilerProc, exportc, dynlib, raises: [KeyError, OSError], tags: [].}

proc hcrGetProc(module: cstring; name: cstring): pointer {...}{.compilerProc,
    exportc, dynlib, raises: [KeyError], tags: [].}

proc hcrRegisterGlobal(module: cstring; name: cstring; size: Natural;
                       gcMarker: HcrGcMarkerProc; outPtr: ptr pointer): bool {...}{.
    compilerProc, exportc, dynlib, raises: [KeyError], tags: [].}

proc hcrGetGlobal(module: cstring; name: cstring): pointer {...}{.compilerProc,
    exportc, dynlib, raises: [KeyError], tags: [].}

proc hcrInit(moduleList: ptr pointer; main, sys: cstring;
             datInit: HcrModuleInitializer; handle: pointer; gpa: HcrProcGetter) {...}{.
    compilerProc, exportc, dynlib, raises: [KeyError, Exception, LibraryError],
    tags: [RootEffect].}

proc hcrHasModuleChanged(moduleHash: string): bool {...}{.compilerProc, exportc,
    dynlib, raises: [KeyError], tags: [].}

proc hcrReloadNeeded(): bool {...}{.compilerProc, exportc, dynlib,
                               raises: [KeyError], tags: [].}

proc hcrPerformCodeReload() {...}{.compilerProc, exportc, dynlib,
                              raises: [KeyError, Exception, LibraryError],
                              tags: [RootEffect].}

proc hcrAddEventHandler(isBefore: bool; cb: proc ()) {...}{.compilerProc, exportc,
    dynlib, raises: [KeyError], tags: [].}

proc hcrAddModule(module: cstring) {...}{.compilerProc, exportc, dynlib, raises: [],
                                     tags: [].}

proc hcrGeneration(): int {...}{.compilerProc, exportc, dynlib, raises: [], tags: [].}

proc hcrMarkGlobals() {...}{.compilerProc, exportc, dynlib, nimcall, gcsafe,
                        raises: [Exception], tags: [RootEffect].}