Cleanup: remove leftover manual pthread detection

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index f8fce5a6b46558fa4a4b2d50f78f91eecf229c90..511dbdf302456d46329bce98e1147b7c34a51543 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -8,22 +8,23 @@
  *
  * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
  *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
  */
 
 #include <stddef.h>    /* for offsetof */
 
-#define likely(x)      __builtin_expect(!!(x), 1)
-#define unlikely(x)    __builtin_expect(!!(x), 0)
+#define caa_likely(x)  __builtin_expect(!!(x), 1)
+#define caa_unlikely(x)        __builtin_expect(!!(x), 0)
 
-#define        cmm_barrier()   asm volatile("" : : : "memory")
+#define        cmm_barrier()   __asm__ __volatile__ ("" : : : "memory")
 
 /*
  * Instruct the compiler to perform only a single access to a variable
@@ -37,7 +38,7 @@
  * use is to mediate communication between process-level code and irq/NMI
  * handlers, all running on the same CPU.
  */
-#define CMM_ACCESS_ONCE(x)     (*(volatile typeof(x) *)&(x))
+#define CMM_ACCESS_ONCE(x)     (*(__volatile__  __typeof__(x) *)&(x))
 
 #ifndef caa_max
 #define caa_max(a,b) ((a)>(b)?(a):(b))
@@ -63,12 +64,67 @@
  * @member: name of the field within the object.
  */
 #define caa_container_of(ptr, type, member)                            \
+       __extension__                                                   \
        ({                                                              \
-               const typeof(((type *) NULL)->member) * __ptr = (ptr);  \
+               const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \
                (type *)((char *)__ptr - offsetof(type, member));       \
        })
 
 #define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
-#define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
+#define CAA_BUILD_BUG_ON(cond) ((void)CAA_BUILD_BUG_ON_ZERO(cond))
+
+/*
+ * __rcu is an annotation that documents RCU pointer accesses that need
+ * to be protected by a read-side critical section. Eventually, a static
+ * checker will be able to use this annotation to detect incorrect RCU
+ * usage.
+ */
+#define __rcu
+
+#ifdef __cplusplus
+#define URCU_FORCE_CAST(type, arg)     (reinterpret_cast<type>(arg))
+#else
+#define URCU_FORCE_CAST(type, arg)     ((type) (arg))
+#endif
+
+#define caa_is_signed_type(type)       ((type) -1 < (type) 0)
+
+/*
+ * Cast to unsigned long, sign-extending if @v is signed.
+ * Note: casting to a larger type or to same type size keeps the sign of
+ * the expression being cast (see C99 6.3.1.3).
+ */
+#define caa_cast_long_keep_sign(v)     ((unsigned long) (v))
+
+#if defined (__GNUC__) \
+       && ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)    \
+               || __GNUC__ >= 5)
+#define CDS_DEPRECATED(msg)    \
+       __attribute__((deprecated(msg)))
+#else
+#define CDS_DEPRECATED(msg)    \
+       __attribute__((deprecated))
+#endif
+
+#define CAA_ARRAY_SIZE(x)      (sizeof(x) / sizeof((x)[0]))
+
+/*
+ * Don't allow compiling with buggy compiler.
+ */
+
+#ifdef __GNUC__
+# define URCU_GCC_VERSION      (__GNUC__ * 10000 \
+                               + __GNUC_MINOR__ * 100 \
+                               + __GNUC_PATCHLEVEL__)
+
+/*
+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
+ */
+# ifdef __ARMEL__
+#  if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802
+#   error Your gcc version produces clobbered frame accesses
+#  endif
+# endif
+#endif
 
 #endif /* _URCU_COMPILER_H */