Fix: add missing sched.h include in rculfhash.c

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 4dd89ea212285e664e2cd3c35e796a9af1d73d1e..f977b95fdc60f73b6ef6c9ab2b96c4c30a884de2 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -6,7 +6,7 @@
  *
  * Compiler definitions.
  *
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ * 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.
@@ -20,23 +20,69 @@
 
 #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        barrier()       asm volatile("" : : : "memory");
+#define        cmm_barrier()   asm volatile("" : : : "memory")
 
 /*
  * Instruct the compiler to perform only a single access to a variable
  * (prohibits merging and refetching). The compiler is also forbidden to reorder
- * successive instances of ACCESS_ONCE(), but only when the compiler is aware of
+ * successive instances of CMM_ACCESS_ONCE(), but only when the compiler is aware of
  * particular ordering. Compiler ordering can be ensured, for example, by
- * putting two ACCESS_ONCE() in separate C statements.
+ * putting two CMM_ACCESS_ONCE() in separate C statements.
  *
  * This macro does absolutely -nothing- to prevent the CPU from reordering,
  * merging, or refetching absolutely anything at any time.  Its main intended
  * use is to mediate communication between process-level code and irq/NMI
  * handlers, all running on the same CPU.
  */
-#define 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))
+#endif
+
+#ifndef caa_min
+#define caa_min(a,b) ((a)<(b)?(a):(b))
+#endif
+
+#if defined(__SIZEOF_LONG__)
+#define CAA_BITS_PER_LONG      (__SIZEOF_LONG__ * 8)
+#elif defined(_LP64)
+#define CAA_BITS_PER_LONG      64
+#else
+#define CAA_BITS_PER_LONG      32
+#endif
+
+/*
+ * caa_container_of - Get the address of an object containing a field.
+ *
+ * @ptr: pointer to the field.
+ * @type: type of the object.
+ * @member: name of the field within the object.
+ */
+#define caa_container_of(ptr, type, member)                            \
+       ({                                                              \
+               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))
+
+/*
+ * __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
 
 #endif /* _URCU_COMPILER_H */