[PATCH v2 02/22] vkd3d: Implement shader_cache_open/close.

[Stefan Dösinger]

From: Stefan Dösinger

---
 libs/vkd3d/cache.c | 79 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 76 insertions(+), 3 deletions(-)

diff --git a/libs/vkd3d/cache.c b/libs/vkd3d/cache.c
index 6fe12b10e..1dce309f9 100644
--- a/libs/vkd3d/cache.c
+++ b/libs/vkd3d/cache.c
@@ -22,16 +22,89 @@
 #include <stdarg.h>
 #include <stdio.h>

+/* List of open caches. I expect the number to be small. */
+static struct list cache_list = LIST_INIT(cache_list);
+static struct vkd3d_mutex cache_list_mutex;
+static LONG cache_mutex_initialized;
+
+struct vkd3d_shader_cache
+{
+    LONG refcount;
+    struct vkd3d_shader_cache_desc desc;
+    struct list cache_list_entry;
+    char name[1];
+};
+
 int vkd3d_shader_cache_open(const char *name,
         const struct vkd3d_shader_cache_desc *desc, struct vkd3d_shader_cache **cache)
 {
-    FIXME("%s, %p, %p: stub!\n", debugstr_a(name), desc, cache);
-    return VKD3D_ERROR_NOT_IMPLEMENTED;
+    struct vkd3d_shader_cache *object;
+    size_t size;
+
+    TRACE("%s, %p, %p.\n", debugstr_a(name), desc, cache);
+
+    if (!name || !desc)
+    {
+        WARN("No name or description, returning VKD3D_ERROR_INVALID_ARGUMENT.\n");
+        return VKD3D_ERROR_INVALID_ARGUMENT;
+    }
+
+    /* FIXME: This isn't thread safe and cache_mutex_initialized might overflow. Do we have a
+     * something like DllMain or a platform-independent InitializeOnce? */
+    if (InterlockedIncrement(&cache_mutex_initialized) == 1)
+        vkd3d_mutex_init(&cache_list_mutex);
+
+    vkd3d_mutex_lock(&cache_list_mutex);
+    LIST_FOR_EACH_ENTRY(object, &cache_list, struct vkd3d_shader_cache, cache_list_entry)
+    {
+        if (!strcmp(object->name, name))
+        {
+            TRACE("found an open cache of name %s.\n", debugstr_a(name));
+            if (object->desc.version != desc->version)
+            {
+                WARN("Version mismatch: %"PRIu64", %"PRIu64".\n", object->desc.version, desc->version);
+                vkd3d_mutex_unlock(&cache_list_mutex);
+                return VKD3D_ERROR_VERSION_MISMATCH;
+            }
+            InterlockedIncrement(&object->refcount);
+            *cache = object;
+            vkd3d_mutex_unlock(&cache_list_mutex);
+            return VKD3D_OK;
+        }
+    }
+
+    size = strlen(name) + 1;
+    object = vkd3d_calloc(1, offsetof(struct vkd3d_shader_cache, name[size]));
+    if (!object)
+    {
+        vkd3d_mutex_unlock(&cache_list_mutex);
+        return VKD3D_ERROR_OUT_OF_MEMORY;
+    }
+
+    object->refcount = 1;
+    object->desc = *desc;
+    memcpy(object->name, name, size);
+
+    list_add_head(&cache_list, &object->cache_list_entry);
+    vkd3d_mutex_unlock(&cache_list_mutex);
+
+    *cache = object;
+    return VKD3D_OK;
 }

void vkd3d_shader_cache_close(struct vkd3d_shader_cache *cache)
 {
-    FIXME("%p Stub!\n", cache);
+    ULONG refcount = InterlockedDecrement(&cache->refcount);
+    TRACE("cache %s refcount %u.\n", cache->name, refcount);
+
+    if (refcount)
+        return;
+
+    vkd3d_mutex_lock(&cache_list_mutex);
+    list_remove(&cache->cache_list_entry);
+    vkd3d_mutex_unlock(&cache_list_mutex);
+
+    vkd3d_free(cache);
 }

int vkd3d_shader_cache_put(struct vkd3d_shader_cache *cache,