Add randomness to yield debug test

[urcu.git] / urcu.h

diff --git a/urcu.h b/urcu.h
index 2aa35977036d9432884206983c21b6bc686b9cf0..c77b26f958e34b8521f1b8363d83b6492cb46b0f 100644 (file)
--- a/urcu.h
+++ b/urcu.h
@@ -72,18 +72,26 @@ static inline void atomic_inc(int *v)
 #define YIELD_READ     (1 << 0)
 #define YIELD_WRITE    (1 << 1)
 
-extern int yield_active;
+extern unsigned int yield_active;
+extern unsigned int __thread rand_yield;
 
 static inline void debug_yield_read(void)
 {
        if (yield_active & YIELD_READ)
-               sched_yield();
+               if (rand_r(&rand_yield) & 0x1)
+                       sched_yield();
 }
 
 static inline void debug_yield_write(void)
 {
        if (yield_active & YIELD_WRITE)
-               sched_yield();
+               if (rand_r(&rand_yield) & 0x1)
+                       sched_yield();
+}
+
+static inline void debug_yield_init(void)
+{
+       rand_yield = time(NULL) ^ pthread_self();
 }
 #else
 static inline void debug_yield_read(void)
@@ -92,6 +100,11 @@ static inline void debug_yield_read(void)
 
 static inline void debug_yield_write(void)
 {
+}
+
+static inline void debug_yield_init(void)
+{
+
 }
 #endif