X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu.c;h=be6d4bdfc55b32d624011280c972d6f2772f2853;hb=34b1b9db1cc283c556af5f35f70ea2e4713a440d;hp=ccaf3e95a2d5ad6f7428625b399429cd843344b6;hpb=af7c2dbeac32c663b64ad05e4eca70e18784463b;p=urcu.git

diff --git a/urcu.c b/urcu.c
index ccaf3e9..be6d4bd 100644
--- a/urcu.c
+++ b/urcu.c
@@ -30,6 +30,7 @@
 #include <signal.h>
 #include <assert.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <string.h>
 #include <errno.h>
 #include <poll.h>
@@ -40,6 +41,18 @@
 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
 #include "urcu.h"
 
+/*
+ * If a reader is really non-cooperative and refuses to commit its
+ * rcu_active_readers count to memory (there is no barrier in the reader
+ * per-se), kick it after a few loops waiting for it.
+ */
+#define KICK_READER_LOOPS 10000
+
+/*
+ * Active attempts to check for reader Q.S. before calling futex().
+ */
+#define RCU_QS_ACTIVE_ATTEMPTS 100
+
 #ifdef RCU_MEMBARRIER
 static int init_done;
 int has_sys_membarrier;
@@ -62,7 +75,7 @@ void __attribute__((destructor)) rcu_exit(void);
 
 static pthread_mutex_t rcu_gp_lock = PTHREAD_MUTEX_INITIALIZER;
 
-int gp_futex;
+int32_t gp_futex;
 
 /*
  * Global grace period counter.