From b46e615551b830eb2acb6a9d7eb3b97f2eb65216 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Mon, 3 Jun 2019 16:10:08 -0400
Subject: input_common/sdl/sdl_impl: Simplify SDL_Joystick deleter handling
The deleter can just be set in the constructor and maintained throughout
the lifetime of the object.
If a contained pointer is null, then the deleter won't execute, so this
is safe to do. We don't need to swap it out with a version of a deleter
that does nothing.
---
src/input_common/sdl/sdl_impl.cpp | 29 ++++++++++++++---------------
1 file changed, 14 insertions(+), 15 deletions(-)
(limited to 'src/input_common/sdl/sdl_impl.cpp')
diff --git a/src/input_common/sdl/sdl_impl.cpp b/src/input_common/sdl/sdl_impl.cpp
index be1a77b308..f19a353c3b 100644
--- a/src/input_common/sdl/sdl_impl.cpp
+++ b/src/input_common/sdl/sdl_impl.cpp
@@ -46,9 +46,8 @@ static int SDLEventWatcher(void* userdata, SDL_Event* event) {
class SDLJoystick {
public:
- SDLJoystick(std::string guid_, int port_, SDL_Joystick* joystick,
- decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose)
- : guid{std::move(guid_)}, port{port_}, sdl_joystick{joystick, deleter} {}
+ SDLJoystick(std::string guid_, int port_, SDL_Joystick* joystick)
+ : guid{std::move(guid_)}, port{port_}, sdl_joystick{joystick, &SDL_JoystickClose} {}
void SetButton(int button, bool value) {
std::lock_guard lock{mutex};
@@ -114,10 +113,8 @@ public:
return sdl_joystick.get();
}
- void SetSDLJoystick(SDL_Joystick* joystick,
- decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose) {
- sdl_joystick =
- std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)>(joystick, deleter);
+ void SetSDLJoystick(SDL_Joystick* joystick) {
+ sdl_joystick.reset(joystick);
}
private:
@@ -140,13 +137,13 @@ std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickByGUID(const std::string& g
const auto it = joystick_map.find(guid);
if (it != joystick_map.end()) {
while (it->second.size() <= static_cast<std::size_t>(port)) {
- auto joystick = std::make_shared<SDLJoystick>(guid, static_cast<int>(it->second.size()),
- nullptr, [](SDL_Joystick*) {});
+ auto joystick =
+ std::make_shared<SDLJoystick>(guid, static_cast<int>(it->second.size()), nullptr);
it->second.emplace_back(std::move(joystick));
}
return it->second[port];
}
- auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr, [](SDL_Joystick*) {});
+ auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr);
return joystick_map[guid].emplace_back(std::move(joystick));
}
@@ -222,12 +219,13 @@ void SDLState::InitJoystick(int joystick_index) {
}
void SDLState::CloseJoystick(SDL_Joystick* sdl_joystick) {
- std::string guid = GetGUID(sdl_joystick);
+ const std::string guid = GetGUID(sdl_joystick);
+
std::shared_ptr<SDLJoystick> joystick;
{
std::lock_guard lock{joystick_map_mutex};
// This call to guid is safe since the joystick is guaranteed to be in the map
- auto& joystick_guid_list = joystick_map[guid];
+ const auto& joystick_guid_list = joystick_map[guid];
const auto joystick_it =
std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
[&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
@@ -235,9 +233,10 @@ void SDLState::CloseJoystick(SDL_Joystick* sdl_joystick) {
});
joystick = *joystick_it;
}
- // Destruct SDL_Joystick outside the lock guard because SDL can internally call event calback
- // which locks the mutex again
- joystick->SetSDLJoystick(nullptr, [](SDL_Joystick*) {});
+
+ // Destruct SDL_Joystick outside the lock guard because SDL can internally call the
+ // event callback which locks the mutex again.
+ joystick->SetSDLJoystick(nullptr);
}
void SDLState::HandleGameControllerEvent(const SDL_Event& event) {
--
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