--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDL3/SDL_properties.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,570 @@
+/*
+  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.
+*/
+
+/**
+ * # CategoryProperties
+ *
+ * A property is a variable that can be created and retrieved by name at
+ * runtime.
+ *
+ * All properties are part of a property group (SDL_PropertiesID). A property
+ * group can be created with the SDL_CreateProperties function and destroyed
+ * with the SDL_DestroyProperties function.
+ *
+ * Properties can be added to and retrieved from a property group through the
+ * following functions:
+ *
+ * - SDL_SetPointerProperty and SDL_GetPointerProperty operate on `void*`
+ *   pointer types.
+ * - SDL_SetStringProperty and SDL_GetStringProperty operate on string types.
+ * - SDL_SetNumberProperty and SDL_GetNumberProperty operate on signed 64-bit
+ *   integer types.
+ * - SDL_SetFloatProperty and SDL_GetFloatProperty operate on floating point
+ *   types.
+ * - SDL_SetBooleanProperty and SDL_GetBooleanProperty operate on boolean
+ *   types.
+ *
+ * Properties can be removed from a group by using SDL_ClearProperty.
+ */
+
+
+#ifndef SDL_properties_h_
+#define SDL_properties_h_
+
+#include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_error.h>
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * An ID that represents a properties set.
+ *
+ * \since This datatype is available since SDL 3.2.0.
+ */
+typedef Uint32 SDL_PropertiesID;
+
+/**
+ * SDL property type
+ *
+ * \since This enum is available since SDL 3.2.0.
+ */
+typedef enum SDL_PropertyType
+{
+    SDL_PROPERTY_TYPE_INVALID,
+    SDL_PROPERTY_TYPE_POINTER,
+    SDL_PROPERTY_TYPE_STRING,
+    SDL_PROPERTY_TYPE_NUMBER,
+    SDL_PROPERTY_TYPE_FLOAT,
+    SDL_PROPERTY_TYPE_BOOLEAN
+} SDL_PropertyType;
+
+/**
+ * A generic property for naming things.
+ *
+ * This property is intended to be added to any SDL_PropertiesID that needs a
+ * generic name associated with the property set. It is not guaranteed that
+ * any property set will include this key, but it is convenient to have a
+ * standard key that any piece of code could reasonably agree to use.
+ *
+ * For example, the properties associated with an SDL_Texture might have a
+ * name string of "player sprites", or an SDL_AudioStream might have
+ * "background music", etc. This might also be useful for an SDL_IOStream to
+ * list the path to its asset.
+ *
+ * There is no format for the value set with this key; it is expected to be
+ * human-readable and informational in nature, possibly for logging or
+ * debugging purposes.
+ *
+ * SDL does not currently set this property on any objects it creates, but
+ * this may change in later versions; it is currently expected that apps and
+ * external libraries will take advantage of it, when appropriate.
+ *
+ * \since This macro is available since SDL 3.4.0.
+ */
+#define SDL_PROP_NAME_STRING "SDL.name"
+
+/**
+ * Get the global SDL properties.
+ *
+ * \returns a valid property ID on success or 0 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetGlobalProperties(void);
+
+/**
+ * Create a group of properties.
+ *
+ * All properties are automatically destroyed when SDL_Quit() is called.
+ *
+ * \returns an ID for a new group of properties, or 0 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_DestroyProperties
+ */
+extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_CreateProperties(void);
+
+/**
+ * Copy a group of properties.
+ *
+ * Copy all the properties from one group of properties to another, with the
+ * exception of properties requiring cleanup (set using
+ * SDL_SetPointerPropertyWithCleanup()), which will not be copied. Any
+ * property that already exists on `dst` will be overwritten.
+ *
+ * \param src the properties to copy.
+ * \param dst the destination properties.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread. This
+ *               function acquires simultaneous mutex locks on both the source
+ *               and destination property sets.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_CopyProperties(SDL_PropertiesID src, SDL_PropertiesID dst);
+
+/**
+ * Lock a group of properties.
+ *
+ * Obtain a multi-threaded lock for these properties. Other threads will wait
+ * while trying to lock these properties until they are unlocked. Properties
+ * must be unlocked before they are destroyed.
+ *
+ * The lock is automatically taken when setting individual properties, this
+ * function is only needed when you want to set several properties atomically
+ * or want to guarantee that properties being queried aren't freed in another
+ * thread.
+ *
+ * \param props the properties to lock.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_UnlockProperties
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_LockProperties(SDL_PropertiesID props);
+
+/**
+ * Unlock a group of properties.
+ *
+ * \param props the properties to unlock.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_LockProperties
+ */
+extern SDL_DECLSPEC void SDLCALL SDL_UnlockProperties(SDL_PropertiesID props);
+
+/**
+ * A callback used to free resources when a property is deleted.
+ *
+ * This should release any resources associated with `value` that are no
+ * longer needed.
+ *
+ * This callback is set per-property. Different properties in the same group
+ * can have different cleanup callbacks.
+ *
+ * This callback will be called _during_ SDL_SetPointerPropertyWithCleanup if
+ * the function fails for any reason.
+ *
+ * \param userdata an app-defined pointer passed to the callback.
+ * \param value the pointer assigned to the property to clean up.
+ *
+ * \threadsafety This callback may fire without any locks held; if this is a
+ *               concern, the app should provide its own locking.
+ *
+ * \since This datatype is available since SDL 3.2.0.
+ *
+ * \sa SDL_SetPointerPropertyWithCleanup
+ */
+typedef void (SDLCALL *SDL_CleanupPropertyCallback)(void *userdata, void *value);
+
+/**
+ * Set a pointer property in a group of properties with a cleanup function
+ * that is called when the property is deleted.
+ *
+ * The cleanup function is also called if setting the property fails for any
+ * reason.
+ *
+ * For simply setting basic data types, like numbers, bools, or strings, use
+ * SDL_SetNumberProperty, SDL_SetBooleanProperty, or SDL_SetStringProperty
+ * instead, as those functions will handle cleanup on your behalf. This
+ * function is only for more complex, custom data.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property, or NULL to delete the property.
+ * \param cleanup the function to call when this property is deleted, or NULL
+ *                if no cleanup is necessary.
+ * \param userdata a pointer that is passed to the cleanup function.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPointerProperty
+ * \sa SDL_SetPointerProperty
+ * \sa SDL_CleanupPropertyCallback
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetPointerPropertyWithCleanup(SDL_PropertiesID props, const char *name, void *value, SDL_CleanupPropertyCallback cleanup, void *userdata);
+
+/**
+ * Set a pointer property in a group of properties.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property, or NULL to delete the property.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPointerProperty
+ * \sa SDL_HasProperty
+ * \sa SDL_SetBooleanProperty
+ * \sa SDL_SetFloatProperty
+ * \sa SDL_SetNumberProperty
+ * \sa SDL_SetPointerPropertyWithCleanup
+ * \sa SDL_SetStringProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetPointerProperty(SDL_PropertiesID props, const char *name, void *value);
+
+/**
+ * Set a string property in a group of properties.
+ *
+ * This function makes a copy of the string; the caller does not have to
+ * preserve the data after this call completes.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property, or NULL to delete the property.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetStringProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetStringProperty(SDL_PropertiesID props, const char *name, const char *value);
+
+/**
+ * Set an integer property in a group of properties.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetNumberProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetNumberProperty(SDL_PropertiesID props, const char *name, Sint64 value);
+
+/**
+ * Set a floating point property in a group of properties.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetFloatProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetFloatProperty(SDL_PropertiesID props, const char *name, float value);
+
+/**
+ * Set a boolean property in a group of properties.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to modify.
+ * \param value the new value of the property.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetBooleanProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetBooleanProperty(SDL_PropertiesID props, const char *name, bool value);
+
+/**
+ * Return whether a property exists in a group of properties.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \returns true if the property exists, or false if it doesn't.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPropertyType
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_HasProperty(SDL_PropertiesID props, const char *name);
+
+/**
+ * Get the type of a property in a group of properties.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \returns the type of the property, or SDL_PROPERTY_TYPE_INVALID if it is
+ *          not set.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_HasProperty
+ */
+extern SDL_DECLSPEC SDL_PropertyType SDLCALL SDL_GetPropertyType(SDL_PropertiesID props, const char *name);
+
+/**
+ * Get a pointer property from a group of properties.
+ *
+ * By convention, the names of properties that SDL exposes on objects will
+ * start with "SDL.", and properties that SDL uses internally will start with
+ * "SDL.internal.". These should be considered read-only and should not be
+ * modified by applications.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \param default_value the default value of the property.
+ * \returns the value of the property, or `default_value` if it is not set or
+ *          not a pointer property.
+ *
+ * \threadsafety It is safe to call this function from any thread, although
+ *               the data returned is not protected and could potentially be
+ *               freed if you call SDL_SetPointerProperty() or
+ *               SDL_ClearProperty() on these properties from another thread.
+ *               If you need to avoid this, use SDL_LockProperties() and
+ *               SDL_UnlockProperties().
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetBooleanProperty
+ * \sa SDL_GetFloatProperty
+ * \sa SDL_GetNumberProperty
+ * \sa SDL_GetPropertyType
+ * \sa SDL_GetStringProperty
+ * \sa SDL_HasProperty
+ * \sa SDL_SetPointerProperty
+ */
+extern SDL_DECLSPEC void * SDLCALL SDL_GetPointerProperty(SDL_PropertiesID props, const char *name, void *default_value);
+
+/**
+ * Get a string property from a group of properties.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \param default_value the default value of the property.
+ * \returns the value of the property, or `default_value` if it is not set or
+ *          not a string property.
+ *
+ * \threadsafety It is safe to call this function from any thread, although
+ *               the data returned is not protected and could potentially be
+ *               freed if you call SDL_SetStringProperty() or
+ *               SDL_ClearProperty() on these properties from another thread.
+ *               If you need to avoid this, use SDL_LockProperties() and
+ *               SDL_UnlockProperties().
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPropertyType
+ * \sa SDL_HasProperty
+ * \sa SDL_SetStringProperty
+ */
+extern SDL_DECLSPEC const char * SDLCALL SDL_GetStringProperty(SDL_PropertiesID props, const char *name, const char *default_value);
+
+/**
+ * Get a number property from a group of properties.
+ *
+ * You can use SDL_GetPropertyType() to query whether the property exists and
+ * is a number property.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \param default_value the default value of the property.
+ * \returns the value of the property, or `default_value` if it is not set or
+ *          not a number property.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPropertyType
+ * \sa SDL_HasProperty
+ * \sa SDL_SetNumberProperty
+ */
+extern SDL_DECLSPEC Sint64 SDLCALL SDL_GetNumberProperty(SDL_PropertiesID props, const char *name, Sint64 default_value);
+
+/**
+ * Get a floating point property from a group of properties.
+ *
+ * You can use SDL_GetPropertyType() to query whether the property exists and
+ * is a floating point property.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \param default_value the default value of the property.
+ * \returns the value of the property, or `default_value` if it is not set or
+ *          not a float property.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPropertyType
+ * \sa SDL_HasProperty
+ * \sa SDL_SetFloatProperty
+ */
+extern SDL_DECLSPEC float SDLCALL SDL_GetFloatProperty(SDL_PropertiesID props, const char *name, float default_value);
+
+/**
+ * Get a boolean property from a group of properties.
+ *
+ * You can use SDL_GetPropertyType() to query whether the property exists and
+ * is a boolean property.
+ *
+ * \param props the properties to query.
+ * \param name the name of the property to query.
+ * \param default_value the default value of the property.
+ * \returns the value of the property, or `default_value` if it is not set or
+ *          not a boolean property.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetPropertyType
+ * \sa SDL_HasProperty
+ * \sa SDL_SetBooleanProperty
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_GetBooleanProperty(SDL_PropertiesID props, const char *name, bool default_value);
+
+/**
+ * Clear a property from a group of properties.
+ *
+ * \param props the properties to modify.
+ * \param name the name of the property to clear.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ClearProperty(SDL_PropertiesID props, const char *name);
+
+/**
+ * A callback used to enumerate all the properties in a group of properties.
+ *
+ * This callback is called from SDL_EnumerateProperties(), and is called once
+ * per property in the set.
+ *
+ * \param userdata an app-defined pointer passed to the callback.
+ * \param props the SDL_PropertiesID that is being enumerated.
+ * \param name the next property name in the enumeration.
+ *
+ * \threadsafety SDL_EnumerateProperties holds a lock on `props` during this
+ *               callback.
+ *
+ * \since This datatype is available since SDL 3.2.0.
+ *
+ * \sa SDL_EnumerateProperties
+ */
+typedef void (SDLCALL *SDL_EnumeratePropertiesCallback)(void *userdata, SDL_PropertiesID props, const char *name);
+
+/**
+ * Enumerate the properties contained in a group of properties.
+ *
+ * The callback function is called for each property in the group of
+ * properties. The properties are locked during enumeration.
+ *
+ * \param props the properties to query.
+ * \param callback the function to call for each property.
+ * \param userdata a pointer that is passed to `callback`.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_EnumerateProperties(SDL_PropertiesID props, SDL_EnumeratePropertiesCallback callback, void *userdata);
+
+/**
+ * Destroy a group of properties.
+ *
+ * All properties are deleted and their cleanup functions will be called, if
+ * any.
+ *
+ * \param props the properties to destroy.
+ *
+ * \threadsafety This function should not be called while these properties are
+ *               locked or other threads might be setting or getting values
+ *               from these properties.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_CreateProperties
+ */
+extern SDL_DECLSPEC void SDLCALL SDL_DestroyProperties(SDL_PropertiesID props);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_properties_h_ */