about summary refs log tree commit diff
path: root/sysdeps/nptl
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/nptl')
-rw-r--r--sysdeps/nptl/internaltypes.h24
1 files changed, 23 insertions, 1 deletions
diff --git a/sysdeps/nptl/internaltypes.h b/sysdeps/nptl/internaltypes.h
index 2f105459ee..7c0d2402a3 100644
--- a/sysdeps/nptl/internaltypes.h
+++ b/sysdeps/nptl/internaltypes.h
@@ -20,6 +20,8 @@
 #define _INTERNALTYPES_H	1
 
 #include <stdint.h>
+#include <atomic.h>
+#include <endian.h>
 
 
 struct pthread_attr
@@ -141,9 +143,29 @@ struct pthread_key_struct
 /* Semaphore variable structure.  */
 struct new_sem
 {
+#if __HAVE_64B_ATOMICS
+  /* The data field holds both value (in the least-significant 32 bytes) and
+     nwaiters.  */
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define SEM_VALUE_OFFSET 0
+# elif __BYTE_ORDER == __BIG_ENDIAN
+#  define SEM_VALUE_OFFSET 1
+# else
+# error Unsupported byte order.
+# endif
+# define SEM_NWAITERS_SHIFT 32
+# define SEM_VALUE_MASK (~(unsigned int)0)
+  unsigned long int data;
+  int private;
+  int pad;
+#else
+# define SEM_VALUE_SHIFT 1
+# define SEM_NWAITERS_MASK ((unsigned int)1)
   unsigned int value;
   int private;
-  unsigned long int nwaiters;
+  int pad;
+  unsigned int nwaiters;
+#endif
 };
 
 struct old_sem