bug

[ka7713]

A bug occurs when adding from inside a loop.

signal.register(AAA, function()
....
signal.register(AAA, ...)
....
end)
signal.emit(AAA)

timer.after(1.0, function()
...
timer.after(1.0, ...)
...
end)

[vrld]

What is the error message?

[vrld]

Can you please give more information? What did you expect and what did you get instead? Your example ...

signal.register("slot", function()
  print("Foo")
  signal.register("slot", function() print("Bar") end)
  print("Baz")
end)

signal.emit("slot")

... Works as expected:

Foo
Baz
Bar

The timer example also works as expected:

timer.after(1, function()
  print("Foo")
  timer.after(1, function()
    print("Bar")
  end)
end)

timer.update(1) --> Foo
timer.update(1) --> Bar

[ka7713]

signal = require("signal")

function register()
	signal.register(1, function()
	  print("Foo")
	  signal.register(1, function() print("Bar") end)
	  print("Baz")
	end)
end

for i=1, 10 do
	register()
	signal.emit(1)
	signal.clear(1)
	print("---")
end

(LuaJIT 2.0.5)

luajit.exe test.lua
Foo
Baz -- <<--- I think this is right. Because Bar is register after emit.
---
Foo
Baz
---
Foo
Baz
---
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
---
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---

(lua 5.1.4)

lua5.1.exe test.lua
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---

(I'm sorry, My English is not good)

[ka7713]

more sample

signal = require("signal")

function test1(mode)
	print("Foo")
	signal.register(1, function() print("Bar") end)
	print("Baz")
end

function register()
	signal.register(1, test1)
	signal.register(1, function() end)
	signal.register(1, function() end)
	signal.register(1, function() end)
end

for i=1,10 do
	register()
	signal.emit(1)
	signal.clear(1)
	print("---")
end

luajit.exe test.lua
Foo
Baz
Bar
Foo --<< call twice
Baz
---
Foo
Baz
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Foo
Baz
---
Foo
Baz
Foo
Baz
---
Foo
Baz
Bar
Foo
Baz
---
Foo
Baz
Bar
Foo
Baz
---
Foo
Baz
Foo
Baz
---
Foo
Baz
Foo
Baz
---
Foo
Baz
Bar
Foo
Baz
---

lua5.1.exe test.lua
Foo
Baz
Bar
---
Foo --<<
Baz
---
Foo --<<
Baz
---
Foo
Baz
Bar
---
Foo --<<
Baz
---
Foo
Baz
Bar
---
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo --<<
Baz
---

---

Timer

timer = require("timer")

function register()
	timer.after(0.5, function() 
		print("Foo")
		-- Bar total 1 second
		timer.after(0.5, function() print("Bar") end)
		print("Baz")
	end)
	timer.after(0.5, function() end)
	timer.after(0.5, function() end)
	timer.after(0.5, function() end)
end

for i=1,10 do
	register()
	timer.update(0.5)
	timer.clear()
	print("---")
end

luajit.exe test3.lua
Foo
Baz
Bar -- Bar 1 sec but call 0.5 sec
---
Foo
Baz
Bar
---
Foo
Baz
---
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---

lua5.1.exe test3.lua
Foo
Baz
---
Foo
Baz
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---
Foo
Baz
Bar
---