* Distributed under GPLv2
*/
-#define __USE_GNU
#include <stdlib.h>
+#include <pthread.h>
/* The "volatile" is due to gcc bugs */
#define barrier() __asm__ __volatile__("": : :"memory")
#endif
/*
- * Limiting the nesting level to 256 to keep instructions small in the read
- * fast-path.
+ * The trick here is that RCU_GP_CTR_BIT must be a multiple of 8 so we can use a
+ * full 8-bits, 16-bits or 32-bits bitmask for the lower order bits.
*/
#define RCU_GP_COUNT (1U << 0)
-#define RCU_GP_CTR_BIT (1U << 8)
+/* Use the amount of bits equal to half of the architecture long size */
+#define RCU_GP_CTR_BIT (sizeof(long) << 2)
#define RCU_GP_CTR_NEST_MASK (RCU_GP_CTR_BIT - 1)
/*
* Using a int rather than a char to eliminate false register dependencies
* causing stalls on some architectures.
*/
-extern int urcu_gp_ctr;
+extern long urcu_gp_ctr;
-extern int __thread urcu_active_readers;
+extern long __thread urcu_active_readers;
static inline int rcu_old_gp_ongoing(int *value)
{
- int v;
+ long v;
if (value == NULL)
return 0;
static inline void rcu_read_lock(void)
{
- int tmp;
+ long tmp;
debug_yield_read();
tmp = urcu_active_readers;