Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

2023-07-25 22:27:55 +02:00
parent b38ea75e56 dec0d4ec41
commit b8e444eaa8
1663 changed files with 627495 additions and 0 deletions
--- a/external/sdl/SDL/src/timer/windows/SDL_systimer.c
+++ b/external/sdl/SDL/src/timer/windows/SDL_systimer.c
@@ -0,0 +1,115 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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_WINDOWS
+
+#include "../../core/windows/SDL_windows.h"
+
+
+#ifdef CREATE_WAITABLE_TIMER_HIGH_RESOLUTION
+static void SDL_CleanupWaitableTimer(void *timer)
+{
+    CloseHandle(timer);
+}
+
+HANDLE SDL_GetWaitableTimer()
+{
+    static SDL_TLSID TLS_timer_handle;
+    HANDLE timer;
+
+    if (!TLS_timer_handle) {
+        TLS_timer_handle = SDL_CreateTLS();
+    }
+    timer = SDL_GetTLS(TLS_timer_handle);
+    if (!timer) {
+        timer = CreateWaitableTimerExW(NULL, NULL, CREATE_WAITABLE_TIMER_HIGH_RESOLUTION, TIMER_ALL_ACCESS);
+        if (timer) {
+            SDL_SetTLS(TLS_timer_handle, timer, SDL_CleanupWaitableTimer);
+        }
+    }
+    return timer;
+}
+#endif /* CREATE_WAITABLE_TIMER_HIGH_RESOLUTION */
+
+Uint64 SDL_GetPerformanceCounter(void)
+{
+    LARGE_INTEGER counter;
+    const BOOL rc = QueryPerformanceCounter(&counter);
+    SDL_assert(rc != 0); /* this should _never_ fail if you're on XP or later. */
+    return (Uint64)counter.QuadPart;
+}
+
+Uint64 SDL_GetPerformanceFrequency(void)
+{
+    LARGE_INTEGER frequency;
+    const BOOL rc = QueryPerformanceFrequency(&frequency);
+    SDL_assert(rc != 0); /* this should _never_ fail if you're on XP or later. */
+    return (Uint64)frequency.QuadPart;
+}
+
+void SDL_DelayNS(Uint64 ns)
+{
+    /* CREATE_WAITABLE_TIMER_HIGH_RESOLUTION flag was added in Windows 10 version 1803.
+     *
+     * Sleep() is not publicly available to apps in early versions of WinRT.
+     *
+     * Visual C++ 2013 Update 4 re-introduced Sleep() for Windows 8.1 and
+     * Windows Phone 8.1.
+     *
+     * Use the compiler version to determine availability.
+     *
+     * NOTE #1: _MSC_FULL_VER == 180030723 for Visual C++ 2013 Update 3.
+     * NOTE #2: Visual C++ 2013, when compiling for Windows 8.0 and
+     *    Windows Phone 8.0, uses the Visual C++ 2012 compiler to build
+     *    apps and libraries.
+     */
+#ifdef CREATE_WAITABLE_TIMER_HIGH_RESOLUTION
+    HANDLE timer = SDL_GetWaitableTimer();
+    if (timer) {
+        LARGE_INTEGER due_time;
+        due_time.QuadPart = -((LONGLONG)ns / 100);
+        if (SetWaitableTimerEx(timer, &due_time, 0, NULL, NULL, NULL, 0)) {
+            WaitForSingleObject(timer, INFINITE);
+        }
+        return;
+    }
+#endif
+
+    {
+        const Uint64 max_delay = 0xffffffffLL * SDL_NS_PER_MS;
+        if (ns > max_delay) {
+            ns = max_delay;
+        }
+
+#if defined(__WINRT__) && defined(_MSC_FULL_VER) && (_MSC_FULL_VER <= 180030723)
+        static HANDLE mutex = 0;
+        if (!mutex) {
+            mutex = CreateEventEx(0, 0, 0, EVENT_ALL_ACCESS);
+        }
+        WaitForSingleObjectEx(mutex, (DWORD)SDL_NS_TO_MS(ns), FALSE);
+#else
+        Sleep((DWORD)SDL_NS_TO_MS(ns));
+#endif
+    }
+}
+
+#endif /* SDL_TIMER_WINDOWS */