ust: continue work

[ust.git] / share / kernelcompat.h

diff --git a/share/kernelcompat.h b/share/kernelcompat.h
index b6615eeaf1edfbd7d95090d0d4658dfedaf9da2c..aa3d0facba17f8333148d409e1500eb99ac0eaf6 100644 (file)
--- a/share/kernelcompat.h
+++ b/share/kernelcompat.h
@@ -1,6 +1,8 @@
 #ifndef KERNELCOMPAT_H
 #define KERNELCOMPAT_H
 
+#include "compiler.h"
+
 #include <string.h>
 
 #define container_of(ptr, type, member) ({                      \
@@ -10,16 +12,36 @@
 #define KERN_DEBUG
 #define KERN_NOTICE
 
+/* ERROR OPS */
+
+#define MAX_ERRNO      4095
+
+#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
+
 static inline void *ERR_PTR(long error)
 {
-        return (void *) error;
+       return (void *) error;
 }
 
+static inline long PTR_ERR(const void *ptr)
+{
+       return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+       return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+
+/* FIXED SIZE INTEGERS */
 
 #include <stdint.h>
 
+typedef uint8_t u8;
 typedef uint16_t u16;
 typedef uint32_t u32;
+typedef uint64_t u64;
 
 
 #include <pthread.h>
@@ -43,14 +65,47 @@ typedef uint32_t u32;
 #define printk(fmt, args...) printf(fmt, ## args)
 
 
+/* MEMORY BARRIERS */
+
+#define smp_rmb() do {} while(0)
+#define smp_wmb() do {} while(0)
+#define smp_mb() do {} while(0)
+#define smp_mb__after_atomic_inc() do {} while(0)
+
+#define read_barrier_depends() do {} while(0)
+#define smp_read_barrier_depends() do {} while(0)
 
-#define smp_rmb()
-#define smp_wmb()
+/* RCU */
 
+#define rcu_assign_pointer(a, b) do {} while(0)
 
-#define read_barrier_depends()
-#define smp_read_barrier_depends()
+/* ATOMICITY */
+#include <signal.h>
+
+typedef struct { sig_atomic_t counter; } atomic_t;
+
+static inline int atomic_dec_and_test(atomic_t *p)
+{
+       (p->counter)--;
+       return !p->counter;
+}
+
+static inline void atomic_set(atomic_t *p, int v)
+{
+       p->counter=v;
+}
+
+static inline void atomic_inc(atomic_t *p)
+{
+       p->counter++;
+}
+
+static int atomic_read(atomic_t *p)
+{
+       return p->counter;
+}
 
+/* CACHE */
+#define ____cacheline_aligned
 
-#define rcu_assign_pointer(a, b)
 #endif /* KERNELCOMPAT_H */