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inpututil: Add comments about concurrent safety

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This commit is contained in:
Hajime Hoshi 2018-02-17 03:12:58 +09:00
parent 87f207d862
commit 381aab0a91
1 changed files with 20 additions and 0 deletions
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20
inpututil/inpututil.go
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@ -127,12 +127,16 @@ func (i *inputState) update() {
// IsKeyJustPressed returns a boolean value indicating
// whether the given key is pressed just in the current frame.
//
// IsKeyJustPressed is concurrent safe.
func IsKeyJustPressed(key ebiten.Key) bool {
return KeyPressDuration(key) == 1
}
// IsKeyJustReleased returns a boolean value indicating
// whether the given key is released just in the current frame.
//
// IsKeyJustReleased is concurrent safe.
func IsKeyJustReleased(key ebiten.Key) bool {
theInputState.m.RLock()
r := theInputState.keyStates[key] == 0 && theInputState.prevKeyStates[key] > 0
@ -141,6 +145,8 @@ func IsKeyJustReleased(key ebiten.Key) bool {
}
// KeyPressDuration returns how long the key is pressed in frames.
//
// KeyPressDuration is concurrent safe.
func KeyPressDuration(key ebiten.Key) int {
theInputState.m.RLock()
s := theInputState.keyStates[key]
@ -150,12 +156,16 @@ func KeyPressDuration(key ebiten.Key) int {
// IsMouseButtonJustPressed returns a boolean value indicating
// whether the given mouse button is pressed just in the current frame.
//
// IsMouseButtonJustPressed is concurrent safe.
func IsMouseButtonJustPressed(button ebiten.MouseButton) bool {
return MouseButtonPressDuration(button) == 1
}
// IsMouseButtonJustReleased returns a boolean value indicating
// whether the given mouse button is released just in the current frame.
//
// IsMouseButtonJustReleased is concurrent safe.
func IsMouseButtonJustReleased(button ebiten.MouseButton) bool {
theInputState.m.RLock()
r := theInputState.mouseButtonStates[button] == 0 &&
@ -165,6 +175,8 @@ func IsMouseButtonJustReleased(button ebiten.MouseButton) bool {
}
// MouseButtonPressDuration returns how long the mouse button is pressed in frames.
//
// MouseButtonPressDuration is concurrent safe.
func MouseButtonPressDuration(button ebiten.MouseButton) int {
theInputState.m.RLock()
s := theInputState.mouseButtonStates[button]
@ -174,11 +186,15 @@ func MouseButtonPressDuration(button ebiten.MouseButton) int {
// IsGamepadButtonJustPressed returns a boolean value indicating
// whether the given gamepad button of the gamepad id is pressed just in the current frame.
//
// IsGamepadButtonJustPressed is concurrent safe.
func IsGamepadButtonJustPressed(id int, button ebiten.GamepadButton) bool {
return GamepadButtonPressDuration(id, button) == 1
}
// GamepadButtonPressDuration returns how long the gamepad button of the gamepad id is pressed in frames.
//
// GamepadButtonPressDuration is concurrent safe.
func GamepadButtonPressDuration(id int, button ebiten.GamepadButton) int {
theInputState.m.RLock()
s := 0
@ -191,11 +207,15 @@ func GamepadButtonPressDuration(id int, button ebiten.GamepadButton) int {
// IsJustTouched returns a boolean value indicating
// whether the given touch is pressed just in the current frame.
//
// IsJustTouched is concurrent safe.
func IsJustTouched(id int) bool {
return TouchDuration(id) == 1
}
// TouchDuration returns how long the touch remains in frames.
//
// TouchDuration is concurrent safe.
func TouchDuration(id int) int {
theInputState.m.RLock()
s := theInputState.touchStates[id]