X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Fprioq.h;h=d836b36cd9c6dc89e0b8fa58ceb09f3accbd0242;hp=17679b2aaf044052835fec34ad891a825b9dc426;hb=f1e3bee216b9eac1d5b00415617cb2ff5e894c10;hpb=e3017af97310da024ffb378ed155bc1676922ce7

diff --git a/src/shared/prioq.h b/src/shared/prioq.h
index 17679b2aa..d836b36cd 100644
--- a/src/shared/prioq.h
+++ b/src/shared/prioq.h
@@ -25,6 +25,8 @@
 
 typedef struct Prioq Prioq;
 
+#define PRIOQ_IDX_NULL ((unsigned) -1)
+
 Prioq *prioq_new(compare_func_t compare);
 void prioq_free(Prioq *q);
 int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
@@ -33,8 +35,8 @@ int prioq_put(Prioq *q, void *data, unsigned *idx);
 int prioq_remove(Prioq *q, void *data, unsigned *idx);
 int prioq_reshuffle(Prioq *q, void *data, unsigned *idx);
 
-void *prioq_peek(Prioq *q);
+void *prioq_peek(Prioq *q) _pure_;
 void *prioq_pop(Prioq *q);
 
-unsigned prioq_size(Prioq *q);
-bool prioq_isempty(Prioq *q);
+unsigned prioq_size(Prioq *q) _pure_;
+bool prioq_isempty(Prioq *q) _pure_;