mirror of
https://github.com/PCSX2/pcsx2.git
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Gregory Hainaut
3096e94616
Add a reverse fifo to transfer event from core to plugin Long story short, on linux there is only one event queue in core
112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/* LilyPad - Pad plugin for PS2 Emulator
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* Copyright (C) 2002-2014 PCSX2 Dev Team/ChickenLiver
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Found- ation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along
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* with PCSX2. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Global.h"
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// This is undoubtedly completely unnecessary.
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#include "KeyboardQueue.h"
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// What MS calls a single process Mutex. Faster, supposedly.
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// More importantly, can be abbreviated, amusingly, as cSection.
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static std::mutex cSection;
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#define EVENT_QUEUE_LEN 16
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// Actually points one beyond the last queued event.
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static u8 lastQueuedEvent = 0;
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static u8 nextQueuedEvent = 0;
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static keyEvent queuedEvents[EVENT_QUEUE_LEN];
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void QueueKeyEvent(int key, int event) {
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std::lock_guard<std::mutex> lock(cSection);
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// Don't queue events if escape is on top of queue. This is just for safety
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// purposes when a game is killing the emulator for whatever reason.
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if (nextQueuedEvent == lastQueuedEvent ||
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queuedEvents[nextQueuedEvent].key != VK_ESCAPE ||
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queuedEvents[nextQueuedEvent].evt != KEYPRESS) {
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// Clear queue on escape down, bringing escape to front. May do something
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// with shift/ctrl/alt and F-keys, later.
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if (event == KEYPRESS && key == VK_ESCAPE) {
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nextQueuedEvent = lastQueuedEvent;
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}
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queuedEvents[lastQueuedEvent].key = key;
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queuedEvents[lastQueuedEvent].evt = event;
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lastQueuedEvent = (lastQueuedEvent + 1) % EVENT_QUEUE_LEN;
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// If queue wrapped around, remove last element.
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if (nextQueuedEvent == lastQueuedEvent) {
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nextQueuedEvent = (nextQueuedEvent + 1) % EVENT_QUEUE_LEN;
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}
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}
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}
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int GetQueuedKeyEvent(keyEvent *event) {
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if (lastQueuedEvent == nextQueuedEvent) return 0;
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std::lock_guard<std::mutex> lock(cSection);
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*event = queuedEvents[nextQueuedEvent];
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nextQueuedEvent = (nextQueuedEvent + 1) % EVENT_QUEUE_LEN;
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return 1;
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}
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void ClearKeyQueue() {
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lastQueuedEvent = nextQueuedEvent;
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}
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#ifdef __linux__
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// Above code is for events that go from the plugin to core
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// Here we need the contrary, event that come from core to the plugin
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// Yes it is a crazy ping-pong hell ! I mostly copy past with
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// a R_ (which stand for reverse)
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#define R_EVENT_QUEUE_LEN 256
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static std::mutex core_event;
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static u8 R_lastQueuedEvent = 0;
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static u8 R_nextQueuedEvent = 0;
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static keyEvent R_queuedEvents[R_EVENT_QUEUE_LEN];
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void R_QueueKeyEvent(const keyEvent &evt) {
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std::lock_guard<std::mutex> lock(cSection);
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R_queuedEvents[R_lastQueuedEvent] = evt;
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R_lastQueuedEvent = (R_lastQueuedEvent + 1) % R_EVENT_QUEUE_LEN;
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// In case someone has a severe Parkingson's disease
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assert(R_nextQueuedEvent != R_lastQueuedEvent);
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}
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int R_GetQueuedKeyEvent(keyEvent *event) {
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if (R_lastQueuedEvent == R_nextQueuedEvent) return 0;
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std::lock_guard<std::mutex> lock(core_event);
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*event = R_queuedEvents[R_nextQueuedEvent];
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R_nextQueuedEvent = (R_nextQueuedEvent + 1) % R_EVENT_QUEUE_LEN;
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return 1;
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}
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void R_ClearKeyQueue() {
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R_lastQueuedEvent = R_nextQueuedEvent;
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}
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EXPORT_C_(void) PADWriteEvent(keyEvent &evt)
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{
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//fprintf(stderr, "Received evt:%x key:%x\n", evt.evt, evt.key);
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R_QueueKeyEvent(evt);
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}
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#endif
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