/*
 * An instance of the following structure contains all information that is
 * passed into a new thread when the thread is created using either the
 * "thread create" Tcl command or the ThreadCreate() C function.
 */

typedef struct ThreadCtrl {
    const char *script;		/* The Tcl command this thread should
    const char *script;	/* The Tcl command this thread should
				 * execute */
    int flags;			/* Initial value of the "flags" field in the
				 * ThreadSpecificData structure for the new
				 * thread. Might contain TP_Detached or
				 * TP_TclThread. */
    Tcl_Condition condWait;	/* This condition variable is used to
				 * synchronize the parent and child threads.

	THREAD_WAIT, THREAD_ERRORPROC
    };

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], threadOptions, "option", 0,
	    &option) != TCL_OK) {
    if (Tcl_GetIndexFromObjStruct(interp, objv[1], threadOptions,
	    sizeof(char *), "option", 0, &option) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Make sure the initial thread is on the list before doing anything.
     */

	    Tcl_Obj *idObj;

	    /*
	     * Check if they want the main thread id or the current thread id.
	     */

	    if (objc == 2) {
		idObj = Tcl_NewLongObj((long)(size_t)Tcl_GetCurrentThread());
		idObj = Tcl_NewWideIntObj((Tcl_WideInt)(size_t)Tcl_GetCurrentThread());
	    } else if (objc == 3
		    && strcmp("-main", Tcl_GetString(objv[2])) == 0) {
		Tcl_MutexLock(&threadMutex);
		idObj = Tcl_NewLongObj((long)(size_t)mainThreadId);
		Tcl_MutexUnlock(&threadMutex);
	    } else {
		Tcl_WrongNumArgs(interp, 2, objv, NULL);
		return TCL_ERROR;
	    }

	    Tcl_SetObjResult(interp, idObj);
	    return TCL_OK;
	} else {
	    Tcl_WrongNumArgs(interp, 2, objv, NULL);
	    return TCL_ERROR;
	}
    case THREAD_JOIN: {
	long id;
	Tcl_WideInt id;
	int result, status;

	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "id");
	    return TCL_ERROR;
	}
	if (Tcl_GetLongFromObj(interp, objv[2], &id) != TCL_OK) {
	if (Tcl_GetWideIntFromObj(interp, objv[2], &id) != TCL_OK) {
	    return TCL_ERROR;
	}

	result = Tcl_JoinThread((Tcl_ThreadId)(size_t)id, &status);
	if (result == TCL_OK) {
	    Tcl_SetIntObj(Tcl_GetObjResult(interp), status);
	    Tcl_SetLongObj(Tcl_GetObjResult(interp), status);
	} else {
	    char buf[20];

	    TclFormatInt(buf, id);
	    sprintf(buf, "%" TCL_LL_MODIFIER "d", id);
	    Tcl_AppendResult(interp, "cannot join thread ", buf, NULL);
	}
	return result;
    }
    case THREAD_NAMES:
	if (objc > 2) {
	    Tcl_WrongNumArgs(interp, 2, objv, NULL);
	    return TCL_ERROR;
	}
	return ThreadList(interp);
    case THREAD_SEND: {
	long id;
	Tcl_WideInt id;
	const char *script;
	int wait, arg;

	if ((objc != 4) && (objc != 5)) {
	    Tcl_WrongNumArgs(interp, 2, objv, "?-async? id script");
	    return TCL_ERROR;
	}
	if (objc == 5) {
	    if (strcmp("-async", Tcl_GetString(objv[2])) != 0) {
		Tcl_WrongNumArgs(interp, 2, objv, "?-async? id script");
		return TCL_ERROR;
	    }
	    wait = 0;
	    arg = 3;
	} else {
	    wait = 1;
	    arg = 2;
	}
	if (Tcl_GetLongFromObj(interp, objv[arg], &id) != TCL_OK) {
	if (Tcl_GetWideIntFromObj(interp, objv[arg], &id) != TCL_OK) {
	    return TCL_ERROR;
	}
	arg++;
	script = Tcl_GetString(objv[arg]);
	return ThreadSend(interp, (Tcl_ThreadId)(size_t)id, script, wait);
    }
    case THREAD_EVENT: {
	if (objc > 2) {
	    Tcl_WrongNumArgs(interp, 2, objv, NULL);
	    return TCL_ERROR;
	}
	Tcl_SetObjResult(interp, Tcl_NewIntObj(
	Tcl_SetObjResult(interp, Tcl_NewLongObj(
		Tcl_DoOneEvent(TCL_ALL_EVENTS | TCL_DONT_WAIT)));
	return TCL_OK;
    }
    case THREAD_ERRORPROC: {
	/*
	 * Arrange for this proc to handle thread death errors.
	 */

    joinable = joinable ? TCL_THREAD_JOINABLE : TCL_THREAD_NOFLAGS;

    Tcl_MutexLock(&threadMutex);
    if (Tcl_CreateThread(&id, NewTestThread, (ClientData) &ctrl,
	    TCL_THREAD_STACK_DEFAULT, joinable) != TCL_OK) {
	Tcl_MutexUnlock(&threadMutex);
	Tcl_AppendResult(interp, "can't create a new thread", NULL);
	ckfree(ctrl.script);
	return TCL_ERROR;
    }

    /*
     * Wait for the thread to start because it is using something on our stack!
     */

    Tcl_ConditionWait(&ctrl.condWait, &threadMutex, NULL);
    Tcl_MutexUnlock(&threadMutex);
    Tcl_ConditionFinalize(&ctrl.condWait);
    Tcl_SetObjResult(interp, Tcl_NewLongObj((long)(size_t)id));
    Tcl_SetObjResult(interp, Tcl_NewWideIntObj((Tcl_WideInt)(size_t)id));
    return TCL_OK;
}

/*
 *------------------------------------------------------------------------
 *
 * NewTestThread --

    Tcl_MutexUnlock(&threadMutex);

    /*
     * Run the script.
     */

    Tcl_Preserve(tsdPtr->interp);
    result = Tcl_Eval(tsdPtr->interp, threadEvalScript);
    result = Tcl_EvalEx(tsdPtr->interp, threadEvalScript, -1, 0);
    if (result != TCL_OK) {
	ThreadErrorProc(tsdPtr->interp);
    }

    /*
     * Clean up.
     */

    Tcl_Interp *interp)		/* Interp that failed */
{
    Tcl_Channel errChannel;
    const char *errorInfo, *argv[3];
    char *script;
    char buf[TCL_DOUBLE_SPACE+1];

    TclFormatInt(buf, (size_t) Tcl_GetCurrentThread());
    sprintf(buf, "%" TCL_LL_MODIFIER "d", (Tcl_WideInt)(size_t)Tcl_GetCurrentThread());

    errorInfo = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);
    if (errorProcString == NULL) {
	errChannel = Tcl_GetStdChannel(TCL_STDERR);
	Tcl_WriteChars(errChannel, "Error from thread ", TCL_STRLEN);
	Tcl_WriteChars(errChannel, buf, TCL_STRLEN);
	Tcl_WriteChars(errChannel, "\n", 1);

    ThreadSpecificData *tsdPtr;
    Tcl_Obj *listPtr;

    listPtr = Tcl_NewListObj(0, NULL);
    Tcl_MutexLock(&threadMutex);
    for (tsdPtr = threadList ; tsdPtr ; tsdPtr = tsdPtr->nextPtr) {
	Tcl_ListObjAppendElement(interp, listPtr,
		Tcl_NewLongObj((long)(size_t)tsdPtr->threadId));
		Tcl_NewWideIntObj((Tcl_WideInt)(size_t)tsdPtr->threadId));
    }
    Tcl_MutexUnlock(&threadMutex);
    Tcl_SetObjResult(interp, listPtr);
    return TCL_OK;
}

/*

	    ckfree(resultPtr->errorCode);
	}
	if (resultPtr->errorInfo) {
	    Tcl_AddErrorInfo(interp, resultPtr->errorInfo);
	    ckfree(resultPtr->errorInfo);
	}
    }
    Tcl_SetResult(interp, resultPtr->result, TCL_DYNAMIC);
    Tcl_AppendResult(interp, resultPtr->result, NULL);
    Tcl_ConditionFinalize(&resultPtr->done);
    code = resultPtr->code;

    ckfree(resultPtr->result);
    ckfree(resultPtr);

    return code;
}

/*
 *------------------------------------------------------------------------