From 217d3a6dabe74be6b9b17deaf29c61c107ac8224 Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata <fjtrujy@gmail.com>
Date: Mon, 13 Jun 2022 20:35:27 +0200
Subject: [PATCH] Add systimer support

---
 CMakeLists.txt               |  6 +++
 include/SDL_config.h.cmake   |  1 +
 src/timer/ps2/SDL_systimer.c | 90 ++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 src/timer/ps2/SDL_systimer.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dfc3ea136..d27fa084b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2524,6 +2524,12 @@ elseif(PSP)
 elseif(PS2)
   list(APPEND EXTRA_CFLAGS "-DPS2")
 
+  if(SDL_TIMERS)
+    set(SDL_TIMER_PS2 1)
+    file(GLOB PS2_TIMER_SOURCES ${SDL2_SOURCE_DIR}/src/timer/ps2/*.c)
+    set(SOURCE_FILES ${SOURCE_FILES} ${PS2_TIMER_SOURCES})
+    set(HAVE_SDL_TIMERS TRUE)
+  endif()
 elseif(OS2)
   list(APPEND EXTRA_CFLAGS "-DOS2EMX_PLAIN_CHAR")
 
diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index c213a2f8e..5d476194c 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -387,6 +387,7 @@
 #cmakedefine SDL_TIMER_OS2 @SDL_TIMER_OS2@
 #cmakedefine SDL_TIMER_VITA @SDL_TIMER_VITA@
 #cmakedefine SDL_TIMER_PSP @SDL_TIMER_PSP@
+#cmakedefine SDL_TIMER_PS2 @SDL_TIMER_PS2@
 
 /* Enable various video drivers */
 #cmakedefine SDL_VIDEO_DRIVER_ANDROID @SDL_VIDEO_DRIVER_ANDROID@
diff --git a/src/timer/ps2/SDL_systimer.c b/src/timer/ps2/SDL_systimer.c
new file mode 100644
index 000000000..42d296803
--- /dev/null
+++ b/src/timer/ps2/SDL_systimer.c
@@ -0,0 +1,90 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#ifdef SDL_TIMER_PS2
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+#include "SDL_error.h"
+#include "../SDL_timer_c.h"
+#include <stdlib.h>
+#include <time.h>
+#include <timer.h>
+#include <sys/time.h>
+
+static uint64_t start;
+static SDL_bool ticks_started = SDL_FALSE;
+
+void
+SDL_TicksInit(void)
+{
+    if (ticks_started) {
+        return;
+    }
+    ticks_started = SDL_TRUE;
+
+    start = GetTimerSystemTime();
+}
+
+void
+SDL_TicksQuit(void)
+{
+    ticks_started = SDL_FALSE;
+}
+
+Uint64
+SDL_GetTicks64(void)
+{
+    uint64_t now;
+
+    if (!ticks_started) {
+        SDL_TicksInit();
+    }
+
+    now = GetTimerSystemTime();
+    return (Uint64)((now - start) / (kBUSCLK / CLOCKS_PER_SEC));
+}
+
+Uint64
+SDL_GetPerformanceCounter(void)
+{
+    return SDL_GetTicks64();
+}
+
+Uint64
+SDL_GetPerformanceFrequency(void)
+{
+    return 1000;
+}
+
+void SDL_Delay(Uint32 ms)
+{
+    struct timespec tv = {0};
+    tv.tv_sec          = ms / 1000;
+    tv.tv_nsec         = (ms % 1000) * 1000000;
+    nanosleep(&tv, NULL);
+}
+
+#endif /* SDL_TIMER_PS2 */
+
+/* vim: ts=4 sw=4
+ */