introduce restricted pointer aliasing marker

[dpdk.git] / lib / librte_eal / include / rte_common.h

diff --git a/lib/librte_eal/include/rte_common.h b/lib/librte_eal/include/rte_common.h
index 28d339a..586f815 100644 (file)
--- a/lib/librte_eal/include/rte_common.h
+++ b/lib/librte_eal/include/rte_common.h
@@ -63,6 +63,11 @@ extern "C" {
                __GNUC_PATCHLEVEL__)
 #endif
 
+/**
+ * Force alignment
+ */
+#define __rte_aligned(a) __attribute__((__aligned__(a)))
+
 #ifdef RTE_ARCH_STRICT_ALIGN
 typedef uint64_t unaligned_uint64_t __rte_aligned(1);
 typedef uint32_t unaligned_uint32_t __rte_aligned(1);
@@ -73,11 +78,6 @@ typedef uint32_t unaligned_uint32_t;
 typedef uint16_t unaligned_uint16_t;
 #endif
 
-/**
- * Force alignment
- */
-#define __rte_aligned(a) __attribute__((__aligned__(a)))
-
 /**
  * Force a structure to be packed
  */
@@ -103,6 +103,15 @@ typedef uint16_t unaligned_uint16_t;
  */
 #define __rte_unused __attribute__((__unused__))
 
+/**
+ * Mark pointer as restricted with regard to pointer aliasing.
+ */
+#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
+#define __rte_restrict __restrict
+#else
+#define __rte_restrict restrict
+#endif
+
 /**
  * definition to mark a variable or function parameter as used so
  * as to avoid a compiler warning
@@ -182,6 +191,11 @@ static void __attribute__((destructor(RTE_PRIO(prio)), used)) func(void)
 #define RTE_FINI(func) \
        RTE_FINI_PRIO(func, LAST)
 
+/**
+ * Hint never returning function
+ */
+#define __rte_noreturn __attribute__((noreturn))
+
 /**
  * Force a function to be inlined
  */
@@ -404,7 +418,7 @@ __extension__ typedef uint64_t RTE_MARKER64[0];
  *    The combined value.
  */
 static inline uint32_t
-rte_combine32ms1b(register uint32_t x)
+rte_combine32ms1b(uint32_t x)
 {
        x |= x >> 1;
        x |= x >> 2;
@@ -426,7 +440,7 @@ rte_combine32ms1b(register uint32_t x)
  *    The combined value.
  */
 static inline uint64_t
-rte_combine64ms1b(register uint64_t v)
+rte_combine64ms1b(uint64_t v)
 {
        v |= v >> 1;
        v |= v >> 2;
@@ -826,9 +840,8 @@ rte_str_to_size(const char *str)
  *     printf format characters which will be expanded using any further parameters
  *     to the function.
  */
-void
+__rte_noreturn void
 rte_exit(int exit_code, const char *format, ...)
-       __attribute__((noreturn))
        __rte_format_printf(2, 3);
 
 #ifdef __cplusplus