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uidriver/mobile: Reduce mutex to avoid potential deadlock

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This commit is contained in:
Hajime Hoshi 2019-08-19 00:30:23 +09:00
parent 6cd74a9f4d
commit 25ac788ee6
2 changed files with 8 additions and 13 deletions
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19
internal/uidriver/mobile/input.go
View File

@ -17,8 +17,6 @@
package mobile
import (
"sync"
"github.com/hajimehoshi/ebiten/internal/driver"
)
@ -32,12 +30,11 @@ type Input struct {
cursorY int
touches map[int]pos
ui *UserInterface
m sync.RWMutex
}
func (i *Input) CursorPosition() (x, y int) {
i.m.RLock()
defer i.m.RUnlock()
i.ui.m.RLock()
defer i.ui.m.RUnlock()
return i.ui.adjustPosition(i.cursorX, i.cursorY)
}
@ -62,8 +59,8 @@ func (i *Input) IsGamepadButtonPressed(id int, button driver.GamepadButton) bool
}
func (i *Input) TouchIDs() []int {
i.m.RLock()
defer i.m.RUnlock()
i.ui.m.RLock()
defer i.ui.m.RUnlock()
if len(i.touches) == 0 {
return nil
@ -77,8 +74,8 @@ func (i *Input) TouchIDs() []int {
}
func (i *Input) TouchPosition(id int) (x, y int) {
i.m.RLock()
defer i.m.RUnlock()
i.ui.m.RLock()
defer i.ui.m.RUnlock()
for tid, pos := range i.touches {
if id == tid {
@ -105,7 +102,7 @@ func (i *Input) IsMouseButtonPressed(key driver.MouseButton) bool {
}
func (i *Input) update(touches []*Touch) {
i.m.Lock()
i.ui.m.Lock()
i.touches = map[int]pos{}
for _, t := range touches {
i.touches[t.ID] = pos{
@ -113,7 +110,7 @@ func (i *Input) update(touches []*Touch) {
Y: t.Y,
}
}
i.m.Unlock()
i.ui.m.Unlock()
}
func (i *Input) ResetForFrame() {

2
internal/uidriver/mobile/ui.go
View File

@ -376,11 +376,9 @@ func (u *UserInterface) screenPaddingImpl() (x0, y0, x1, y1 float64) {
}
func (u *UserInterface) adjustPosition(x, y int) (int, int) {
u.m.Lock()
ox, oy, _, _ := u.screenPaddingImpl()
s := u.scaleImpl()
as := s * getDeviceScale()
u.m.Unlock()
return int(float64(x)/s - ox/as), int(float64(y)/s - oy/as)
}