X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_id.c;h=ef03330e45ef6efa00f3b68ab2d1dcb86809b981;hb=e4da68b7e2c4e44ba2c9592c365779e7cea08b56;hp=81ed8a0379b7f07a38408d73952f9ad96255653c;hpb=9e4b65d0a1f40138fb0c98ae3e597e6fa1330075;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_id.c b/isl_id.c
index 81ed8a0..ef03330 100644
--- a/isl_id.c
+++ b/isl_id.c
@@ -11,6 +11,17 @@
 #include <isl_ctx_private.h>
 #include <isl_id_private.h>
 
+/* A special, static isl_id to use as domains (and ranges)
+ * of sets and parameters domains.
+ * The user should never get a hold on this isl_id.
+ */
+isl_id isl_id_none = {
+	.ref = -1,
+	.ctx = NULL,
+	.name = "#none",
+	.user = NULL
+};
+
 isl_ctx *isl_id_get_ctx(__isl_keep isl_id *id)
 {
 	return id ? id->ctx : NULL;
@@ -85,11 +96,17 @@ __isl_give isl_id *isl_id_alloc(isl_ctx *ctx, const char *name, void *user)
 	return entry->data;
 }
 
+/* If the id has a negative refcount, then it is a static isl_id
+ * which should not be changed.
+ */
 __isl_give isl_id *isl_id_copy(isl_id *id)
 {
 	if (!id)
 		return NULL;
 
+	if (id->ref < 0)
+		return id;
+
 	id->ref++;
 	return id;
 }
@@ -107,6 +124,9 @@ uint32_t isl_hash_id(uint32_t hash, __isl_keep isl_id *id)
 	return hash;
 }
 
+/* If the id has a negative refcount, then it is a static isl_id
+ * and should not be freed.
+ */
 void *isl_id_free(__isl_take isl_id *id)
 {
 	struct isl_hash_table_entry *entry;
@@ -114,6 +134,9 @@ void *isl_id_free(__isl_take isl_id *id)
 	if (!id)
 		return NULL;
 
+	if (id->ref < 0)
+		return NULL;
+
 	if (--id->ref > 0)
 		return NULL;
 
@@ -150,17 +173,3 @@ error:
 	isl_printer_free(p);
 	return NULL;
 }
-
-void isl_id_dump(__isl_keep isl_id *id)
-{
-	isl_printer *printer;
-
-	if (!id)
-		return;
-
-	printer = isl_printer_to_file(isl_id_get_ctx(id), stderr);
-	printer = isl_printer_print_id(printer, id);
-	printer = isl_printer_end_line(printer);
-
-	isl_printer_free(printer);
-}