acpi/acpica/utcache.c

22  *              object_size     - Size of each cached object
24  *              return_cache    - Where the new cache object is returned
28  * DESCRIPTION: Create a cache object
44 	/* Create the cache object */
51 	/* Populate the cache object and return it */
66  * PARAMETERS:  cache           - Handle to cache object
94 		/* Delete and unlink one cached state object */
111  * PARAMETERS:  cache           - Handle to cache object
116  *              cache object.
133 	/* Now we can delete the cache object */
143  * PARAMETERS:  cache       - Handle to cache object
144  *              object      - The object to be released
148  * DESCRIPTION: Release an object to the specified cache. If cache is full,
149  *              the object is deleted.
153 acpi_status acpi_os_release_object(struct acpi_memory_list *cache, void *object)
159 	if (!cache || !object) {
163 	/* If cache is full, just free this object */
166 		ACPI_FREE(object);
170 	/* Otherwise put this object back into the cache */
178 		/* Mark the object as cached */
180 		memset(object, 0xCA, cache->object_size);
181 		ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_CACHED);
183 		/* Put the object at the head of the cache list */
185 		ACPI_SET_DESCRIPTOR_PTR(object, cache->list_head);
186 		cache->list_head = object;
199  * PARAMETERS:  cache           - Handle to cache object
201  * RETURN:      the acquired object. NULL on error
203  * DESCRIPTION: Get an object from the specified cache. If cache is empty,
204  *              the object is allocated.
211 	void *object;
230 		/* There is an object available, use it */
232 		object = cache->list_head;
233 		cache->list_head = ACPI_GET_DESCRIPTOR_PTR(object);
240 				      ACPI_GET_FUNCTION_NAME, object,
250 		memset(object, 0, cache->object_size);
252 		/* The cache is empty, create a new object */
271 		object = ACPI_ALLOCATE_ZEROED(cache->object_size);
272 		if (!object) {
277 	return_PTR(object);