lib: STAILQ_FOREACH_SAFE never gives a null elem

[mirror_frr.git] / lib / stream.h

diff --git a/lib/stream.h b/lib/stream.h
index e5d325e43ed4940dd65f421d6152e60d892a9d81..5341bfa40bde4468dfd8eee46f062123078d9562 100644 (file)
--- a/lib/stream.h
+++ b/lib/stream.h
@@ -28,6 +28,10 @@
 #include "mpls.h"
 #include "prefix.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * A stream is an arbitrary buffer, whose contents generally are assumed to
  * be in network order.
@@ -98,14 +102,15 @@
 struct stream {
        struct stream *next;
 
-       /* Remainder is ***private*** to stream
+       /*
+        * Remainder is ***private*** to stream
         * direct access is frowned upon!
         * Use the appropriate functions/macros
         */
-       size_t getp;     /* next get position */
-       size_t endp;     /* last valid data position */
-       size_t size;     /* size of data segment */
-       unsigned char *data; /* data pointer */
+       size_t getp;           /* next get position */
+       size_t endp;           /* last valid data position */
+       size_t size;           /* size of data segment */
+       unsigned char data[0]; /* data pointer */
 };
 
 /* First in first out queue structure. */
@@ -114,7 +119,10 @@ struct stream_fifo {
        pthread_mutex_t mtx;
 
        /* number of streams in this fifo */
-       _Atomic size_t count;
+       atomic_size_t count;
+#if defined DEV_BUILD
+       atomic_size_t max_count;
+#endif
 
        struct stream *head;
        struct stream *tail;
@@ -129,13 +137,6 @@ struct stream_fifo {
 
 #define STREAM_CONCAT_REMAIN(S1, S2, size) ((size) - (S1)->endp - (S2)->endp)
 
-/* deprecated macros - do not use in new code */
-#if defined(VERSION_TYPE_DEV) && CONFDATE > 20181128
-CPP_NOTICE("lib: time to remove deprecated stream.h macros")
-#endif
-#define STREAM_PNT(S)   stream_pnt((S))
-#define STREAM_REMAIN(S) STREAM_WRITEABLE((S))
-
 /* this macro is deprecated, but not slated for removal anytime soon */
 #define STREAM_DATA(S)  ((S)->data)
 
@@ -151,7 +152,14 @@ extern struct stream *stream_new(size_t);
 extern void stream_free(struct stream *);
 extern struct stream *stream_copy(struct stream *, struct stream *src);
 extern struct stream *stream_dup(struct stream *);
-extern size_t stream_resize(struct stream *, size_t);
+
+#if CONFDATE > 20190821
+CPP_NOTICE("lib: time to remove stream_resize_orig")
+#endif
+extern size_t stream_resize_orig(struct stream *s, size_t newsize);
+#define stream_resize stream_resize_orig
+extern size_t stream_resize_inplace(struct stream **sptr, size_t newsize);
+
 extern size_t stream_get_getp(struct stream *);
 extern size_t stream_get_endp(struct stream *);
 extern size_t stream_get_size(struct stream *);
@@ -400,4 +408,8 @@ static inline uint8_t *ptr_get_be32(uint8_t *ptr, uint32_t *out)
                        goto stream_failure;                                   \
        } while (0)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _ZEBRA_STREAM_H */