use restrict everywhere it's required by c99 and/or posix 2008

to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.

1 files changed, 8 insertions, 2 deletions

diff --git a/include/mqueue.h b/include/mqueue.h
index 92e6ae5e..bd35842c 100644
--- a/include/mqueue.h
+++ b/include/mqueue.h
@@ -4,6 +4,12 @@
 extern "C" {
 #endif
 
+#if __STDC_VERSION__ >= 199901L
+#define __restrict restrict
+#elif !defined(__GNUC__)
+#define __restrict
+#endif
+
 #define __NEED_size_t
 #define __NEED_ssize_t
 #define __NEED_pthread_attr_t
@@ -23,8 +29,8 @@ int mq_notify(mqd_t, const struct sigevent *);
 mqd_t mq_open(const char *, int, ...);
 ssize_t mq_receive(mqd_t, char *, size_t, unsigned *);
 int mq_send(mqd_t, const char *, size_t, unsigned);
-int mq_setattr(mqd_t, const struct mq_attr *, struct mq_attr *);
-ssize_t mq_timedreceive(mqd_t, char *, size_t, unsigned *, const struct timespec *);
+int mq_setattr(mqd_t, const struct mq_attr *__restrict, struct mq_attr *__restrict);
+ssize_t mq_timedreceive(mqd_t, char *__restrict, size_t, unsigned *__restrict, const struct timespec *__restrict);
 int mq_timedsend(mqd_t, const char *, size_t, unsigned, const struct timespec *);
 int mq_unlink(const char *);