add layer_set_video_pos to backend interface

[platform/core/uifw/libtdm.git] / src / tdm_buffer.c

diff --git a/src/tdm_buffer.c b/src/tdm_buffer.c
index 3b8df91..508b9bd 100644 (file)
--- a/src/tdm_buffer.c
+++ b/src/tdm_buffer.c
@@ -43,7 +43,8 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 typedef struct _tdm_buffer_func_info
 {
-    tdm_buffer_release_handler func;
+    tdm_buffer_release_handler release_func;
+    tdm_buffer_destroy_handler destroy_func;
     void *user_data;
 
     struct list_head link;
@@ -53,19 +54,49 @@ typedef struct _tdm_buffer_info
 {
     tbm_surface_h buffer;
 
-    /* frontend ref_count */
+    /* ref_count for frontend */
     int ref_count;
 
-    /* backend ref_count */
+    /* ref_count for backend */
     int backend_ref_count;
 
     struct list_head release_funcs;
+    struct list_head destroy_funcs;
     struct list_head link;
 } tdm_buffer_info;
 
 static int buffer_list_init;
 static struct list_head buffer_list;
 
+static void
+_tdm_buffer_destroy(tdm_buffer_info *buf_info)
+{
+    tdm_buffer_func_info *func_info = NULL, *next = NULL;
+
+    TDM_WARNING_IF_FAIL(buf_info->ref_count == 0);
+    TDM_WARNING_IF_FAIL(buf_info->backend_ref_count == 0);
+
+    LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->release_funcs, link)
+    {
+        LIST_DEL(&func_info->link);
+        free(func_info);
+    }
+
+    LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->destroy_funcs, link)
+        func_info->destroy_func(buf_info, func_info->user_data);
+
+    LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->destroy_funcs, link)
+    {
+        LIST_DEL(&func_info->link);
+        free(func_info);
+    }
+
+    LIST_DEL(&buf_info->link);
+
+    tbm_surface_internal_unref(buf_info->buffer);
+    free(buf_info);
+}
+
 EXTERN tdm_buffer*
 tdm_buffer_create(tbm_surface_h buffer, tdm_error *error)
 {
@@ -104,6 +135,7 @@ tdm_buffer_create(tbm_surface_h buffer, tdm_error *error)
     buf_info->buffer = buffer;
 
     LIST_INITHEAD(&buf_info->release_funcs);
+    LIST_INITHEAD(&buf_info->destroy_funcs);
     LIST_ADDTAIL(&buf_info->link, &buffer_list);
 
     if (error)
@@ -140,31 +172,20 @@ EXTERN void
 tdm_buffer_unref(tdm_buffer *buffer)
 {
     tdm_buffer_info *buf_info;
-    tdm_buffer_func_info *func_info = NULL, *next = NULL;
 
     if (!buffer)
         return;
 
     buf_info = buffer;
+    TDM_RETURN_IF_FAIL (buf_info->ref_count > 0);
+
     buf_info->ref_count--;
 
-    if (buf_info->ref_count > 0)
+    /* destroy tdm_buffer when both ref_count and backend_ref_count are 0. */
+    if (buf_info->ref_count > 0 || buf_info->backend_ref_count > 0)
         return;
 
-    /* Before ref_count become 0, all backend reference should be removed */
-    TDM_WARNING_IF_FAIL(buf_info->backend_ref_count == 0);
-
-    LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->release_funcs, link)
-    {
-        LIST_DEL(&func_info->link);
-        free(func_info);
-    }
-
-    LIST_DEL(&buf_info->link);
-
-    tbm_surface_internal_unref(buf_info->buffer);
-
-    free(buf_info);
+    _tdm_buffer_destroy(buf_info);
 }
 
 EXTERN tdm_error
@@ -180,7 +201,7 @@ tdm_buffer_add_release_handler(tdm_buffer *buffer,
     func_info = calloc(1, sizeof(tdm_buffer_func_info));
     TDM_RETURN_VAL_IF_FAIL(func_info != NULL, TDM_ERROR_OUT_OF_MEMORY);
 
-    func_info->func = func;
+    func_info->release_func = func;
     func_info->user_data = user_data;
 
     buf_info = buffer;
@@ -201,7 +222,7 @@ tdm_buffer_remove_release_handler(tdm_buffer *buffer, tdm_buffer_release_handler
     buf_info = buffer;
     LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->release_funcs, link)
     {
-        if (func_info->func != func || func_info->user_data != user_data)
+        if (func_info->release_func != func || func_info->user_data != user_data)
             continue;
 
         LIST_DEL(&func_info->link);
@@ -212,7 +233,7 @@ tdm_buffer_remove_release_handler(tdm_buffer *buffer, tdm_buffer_release_handler
 }
 
 
-INTERN tdm_buffer*
+EXTERN tdm_buffer*
 tdm_buffer_ref_backend(tdm_buffer *buffer)
 {
     tdm_buffer_info *buf_info;
@@ -225,11 +246,12 @@ tdm_buffer_ref_backend(tdm_buffer *buffer)
     return buffer;
 }
 
-INTERN void
+EXTERN void
 tdm_buffer_unref_backend(tdm_buffer *buffer)
 {
     tdm_buffer_info *buf_info;
     tdm_buffer_func_info *func_info = NULL, *next = NULL;
+    int old_ref_count;
 
     TDM_RETURN_IF_FAIL(buffer != NULL);
 
@@ -239,11 +261,21 @@ tdm_buffer_unref_backend(tdm_buffer *buffer)
     if (buf_info->backend_ref_count > 0)
         return;
 
+    /* ref_count can become 0 in user release function. In that case, buf_info
+     * will be destroyed in tbm_buffer_unref. So we destroy buf_info in this
+     * function only in case that old_ref_count is 0.
+     */
+    old_ref_count = buf_info->ref_count;
+
     LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->release_funcs, link)
-        func_info->func(buffer, func_info->user_data);
+        func_info->release_func(buffer, func_info->user_data);
+
+    /* finally, both ref_count and backend_ref_count are 0. destroy tdm_buffer */
+    if (old_ref_count == 0 && buf_info->ref_count == 0)
+        _tdm_buffer_destroy(buf_info);
 }
 
-INTERN tbm_surface_h
+EXTERN tbm_surface_h
 tdm_buffer_get_surface(tdm_buffer *buffer)
 {
     tdm_buffer_info *buf_info = buffer;
@@ -253,7 +285,7 @@ tdm_buffer_get_surface(tdm_buffer *buffer)
     return buf_info->buffer;
 }
 
-INTERN tdm_buffer*
+EXTERN tdm_buffer*
 tdm_buffer_get(tbm_surface_h buffer)
 {
     tdm_buffer_info *found;
@@ -274,3 +306,46 @@ tdm_buffer_get(tbm_surface_h buffer)
 
     return NULL;
 }
+
+EXTERN tdm_error
+tdm_buffer_add_destroy_handler(tdm_buffer *buffer, tdm_buffer_destroy_handler func, void *user_data)
+{
+    tdm_buffer_info *buf_info;
+    tdm_buffer_func_info *func_info;
+
+    TDM_RETURN_VAL_IF_FAIL(buffer != NULL, TDM_ERROR_INVALID_PARAMETER);
+    TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+    func_info = calloc(1, sizeof(tdm_buffer_func_info));
+    TDM_RETURN_VAL_IF_FAIL(func_info != NULL, TDM_ERROR_OUT_OF_MEMORY);
+
+    func_info->destroy_func = func;
+    func_info->user_data = user_data;
+
+    buf_info = buffer;
+    LIST_ADD(&func_info->link, &buf_info->destroy_funcs);
+
+    return TDM_ERROR_NONE;
+}
+
+EXTERN void
+tdm_buffer_remove_destroy_handler(tdm_buffer *buffer, tdm_buffer_destroy_handler func, void *user_data)
+{
+    tdm_buffer_info *buf_info;
+    tdm_buffer_func_info *func_info = NULL, *next = NULL;
+
+    TDM_RETURN_IF_FAIL(buffer != NULL);
+    TDM_RETURN_IF_FAIL(func != NULL);
+
+    buf_info = buffer;
+    LIST_FOR_EACH_ENTRY_SAFE(func_info, next, &buf_info->destroy_funcs, link)
+    {
+        if (func_info->destroy_func != func || func_info->user_data != user_data)
+            continue;
+
+        LIST_DEL(&func_info->link);
+        free(func_info);
+
+        return;
+    }
+}