initial commit, 4.5 stable

thirdparty/sdl/thread/windows/SDL_sysmutex_c.h

@@ -0,0 +1,73 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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"
+
+#include "../../core/windows/SDL_windows.h"
+
+typedef SDL_Mutex *(*pfnSDL_CreateMutex)(void);
+typedef void (*pfnSDL_LockMutex)(SDL_Mutex *);
+typedef bool (*pfnSDL_TryLockMutex)(SDL_Mutex *);
+typedef void (*pfnSDL_UnlockMutex)(SDL_Mutex *);
+typedef void (*pfnSDL_DestroyMutex)(SDL_Mutex *);
+
+typedef enum
+{
+    SDL_MUTEX_INVALID = 0,
+    SDL_MUTEX_SRW,
+    SDL_MUTEX_CS,
+} SDL_MutexType;
+
+typedef struct SDL_mutex_impl_t
+{
+    pfnSDL_CreateMutex Create;
+    pfnSDL_DestroyMutex Destroy;
+    pfnSDL_LockMutex Lock;
+    pfnSDL_TryLockMutex TryLock;
+    pfnSDL_UnlockMutex Unlock;
+    // Needed by SDL_Condition:
+    SDL_MutexType Type;
+} SDL_mutex_impl_t;
+
+extern SDL_mutex_impl_t SDL_mutex_impl_active;
+
+#ifndef SRWLOCK_INIT
+#define SRWLOCK_INIT \
+    {                \
+        0            \
+    }
+typedef struct _SRWLOCK
+{
+    PVOID Ptr;
+} SRWLOCK, *PSRWLOCK;
+#endif
+
+typedef struct SDL_mutex_srw
+{
+    SRWLOCK srw;
+    // SRW Locks are not recursive, that has to be handled by SDL:
+    DWORD count;
+    DWORD owner;
+} SDL_mutex_srw;
+
+typedef struct SDL_mutex_cs
+{
+    CRITICAL_SECTION cs;
+} SDL_mutex_cs;