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ui/inputmap: prevent race condition between ui_input().pressed() and poll()

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This commit is contained in:
hap 2021-01-27 20:13:11 +01:00
parent 7812e9ebb6
commit 0cd6c079c9
2 changed files with 8 additions and 1 deletions
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8
src/frontend/mame/ui/inputmap.cpp
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@ -245,6 +245,7 @@ menu_input::menu_input(mame_ui_manager &mui, render_container &container)
, erroritem(nullptr)
, lastitem(nullptr)
, record_next(false)
, modified_ticks(0)
{
}
@ -322,11 +323,15 @@ void menu_input::handle()
// if we are polling, handle as a special case
input_item_data *const item = pollingitem;
// prevent race condition between ui_input().pressed() and poll()
if (modified_ticks == 0 && seq_poll->modified())
modified_ticks = osd_ticks();
if (machine().ui_input().pressed(IPT_UI_CANCEL))
{
// if UI_CANCEL is pressed, abort
pollingitem = nullptr;
if (!seq_poll->modified())
if (!seq_poll->modified() || modified_ticks == osd_ticks())
{
// cancelled immediately - toggle between default and none
record_next = false;
@ -368,6 +373,7 @@ void menu_input::handle()
case IPT_UI_SELECT: // an item was selected: begin polling
errormsg.clear();
erroritem = nullptr;
modified_ticks = 0;
pollingitem = &item;
lastitem = &item;
starting_seq = item.seq;

1
src/frontend/mame/ui/inputmap.h
View File

@ -75,6 +75,7 @@ private:
input_item_data *erroritem;
input_item_data *lastitem;
bool record_next;
osd_ticks_t modified_ticks;
input_seq starting_seq;
virtual void custom_render(void *selectedref, float top, float bottom, float x1, float y1, float x2, float y2) override;