Initial rebase of xerpi's port

src/timer/vita/SDL_systimer.c

@@ -0,0 +1,91 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 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_TIMERS_VITA
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+#include "SDL_error.h"
+#include "../SDL_timer_c.h"
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <psp2/kernel/processmgr.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 = sceKernelGetProcessTimeWide();
+}
+
+void
+SDL_TicksQuit(void)
+{
+    ticks_started = SDL_FALSE;
+}
+
+Uint32 SDL_GetTicks(void)
+{
+    if (!ticks_started) {
+        SDL_TicksInit();
+    }
+
+    uint64_t now;
+    Uint32 ticks;
+
+    now = sceKernelGetProcessTimeWide();
+    ticks = (now - start)/1000;
+    return (ticks);
+}
+
+Uint64
+SDL_GetPerformanceCounter(void)
+{
+    return SDL_GetTicks();
+}
+
+Uint64
+SDL_GetPerformanceFrequency(void)
+{
+    return 1000;
+}
+
+void SDL_Delay(Uint32 ms)
+{
+    const Uint32 max_delay = 0xffffffffUL / 1000;
+    if(ms > max_delay)
+        ms = max_delay;
+    sceKernelDelayThreadCB(ms * 1000);
+}
+
+#endif /* SDL_TIMERS_VITA */
+
+/* vim: ts=4 sw=4
+ */