X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=urcu.c;h=10ea7de09efe54ff96800aae4019d7198a9efa24;hb=0c66dad61abe3afdb7d5ec94ed4d39bda8c32647;hp=4ee9e3bebbefbaf30beb078c264b3bc61cf4e897;hpb=5e77fc1f94c3572fca067d37667d74f8165e2434;p=urcu.git

diff --git a/urcu.c b/urcu.c
index 4ee9e3b..10ea7de 100644
--- a/urcu.c
+++ b/urcu.c
@@ -24,20 +24,42 @@
  */
 
 #define _BSD_SOURCE
+#define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <stdio.h>
 #include <pthread.h>
 #include <signal.h>
 #include <assert.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <string.h>
 #include <errno.h>
 #include <poll.h>
 
-#include "urcu-map.h"
+#include "urcu/wfcqueue.h"
+#include "urcu/map/urcu.h"
+#include "urcu/static/urcu.h"
+#include "urcu-pointer.h"
+#include "urcu/tls-compat.h"
+
+#include "urcu-die.h"
 
-#include "urcu-static.h"
 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
+#undef _LGPL_SOURCE
 #include "urcu.h"
+#define _LGPL_SOURCE
+
+/*
+ * 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;
@@ -61,7 +83,7 @@ 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.
@@ -75,11 +97,11 @@ unsigned long rcu_gp_ctr = RCU_GP_COUNT;
  * Written to only by each individual reader. Read by both the reader and the
  * writers.
  */
-struct rcu_reader __thread rcu_reader;
+DEFINE_URCU_TLS(struct rcu_reader, rcu_reader);
 
 #ifdef DEBUG_YIELD
 unsigned int yield_active;
-unsigned int __thread rand_yield;
+DEFINE_URCU_TLS(unsigned int, rand_yield);
 #endif
 
 static CDS_LIST_HEAD(registry);
@@ -90,20 +112,15 @@ static void mutex_lock(pthread_mutex_t *mutex)
 
 #ifndef DISTRUST_SIGNALS_EXTREME
 	ret = pthread_mutex_lock(mutex);
-	if (ret) {
-		perror("Error in pthread mutex lock");
-		exit(-1);
-	}
+	if (ret)
+		urcu_die(ret);
 #else /* #ifndef DISTRUST_SIGNALS_EXTREME */
 	while ((ret = pthread_mutex_trylock(mutex)) != 0) {
-		if (ret != EBUSY && ret != EINTR) {
-			printf("ret = %d, errno = %d\n", ret, errno);
-			perror("Error in pthread mutex lock");
-			exit(-1);
-		}
-		if (CMM_LOAD_SHARED(rcu_reader.need_mb)) {
+		if (ret != EBUSY && ret != EINTR)
+			urcu_die(ret);
+		if (CMM_LOAD_SHARED(URCU_TLS(rcu_reader).need_mb)) {
 			cmm_smp_mb();
-			_CMM_STORE_SHARED(rcu_reader.need_mb, 0);
+			_CMM_STORE_SHARED(URCU_TLS(rcu_reader).need_mb, 0);
 			cmm_smp_mb();
 		}
 		poll(NULL,0,10);
@@ -116,16 +133,14 @@ static void mutex_unlock(pthread_mutex_t *mutex)
 	int ret;
 
 	ret = pthread_mutex_unlock(mutex);
-	if (ret) {
-		perror("Error in pthread mutex unlock");
-		exit(-1);
-	}
+	if (ret)
+		urcu_die(ret);
 }
 
 #ifdef RCU_MEMBARRIER
 static void smp_mb_master(int group)
 {
-	if (likely(has_sys_membarrier))
+	if (caa_likely(has_sys_membarrier))
 		membarrier(MEMBARRIER_EXPEDITED);
 	else
 		cmm_smp_mb();
@@ -226,7 +241,7 @@ void update_counter_and_wait(void)
 	cmm_smp_mb();
 
 	/*
-	 * Wait for each thread rcu_reader.ctr count to become 0.
+	 * Wait for each thread URCU_TLS(rcu_reader).ctr count to become 0.
 	 */
 	for (;;) {
 		wait_loops++;
@@ -258,7 +273,8 @@ void update_counter_and_wait(void)
 #else /* #ifndef HAS_INCOHERENT_CACHES */
 		/*
 		 * BUSY-LOOP. Force the reader thread to commit its
-		 * rcu_reader.ctr update to memory if we wait for too long.
+		 * URCU_TLS(rcu_reader).ctr update to memory if we wait
+		 * for too long.
 		 */
 		if (cds_list_empty(&registry)) {
 			if (wait_loops == RCU_QS_ACTIVE_ATTEMPTS) {
@@ -309,7 +325,7 @@ void synchronize_rcu(void)
 	 * committing next rcu_gp_ctr update to memory. Failure to do so could
 	 * result in the writer waiting forever while new readers are always
 	 * accessing data (no progress).  Enforce compiler-order of load
-	 * rcu_reader ctr before store to rcu_gp_ctr.
+	 * URCU_TLS(rcu_reader).ctr before store to rcu_gp_ctr.
 	 */
 	cmm_barrier();
 
@@ -349,20 +365,20 @@ void rcu_read_unlock(void)
 
 void rcu_register_thread(void)
 {
-	rcu_reader.tid = pthread_self();
-	assert(rcu_reader.need_mb == 0);
-	assert(!(rcu_reader.ctr & RCU_GP_CTR_NEST_MASK));
+	URCU_TLS(rcu_reader).tid = pthread_self();
+	assert(URCU_TLS(rcu_reader).need_mb == 0);
+	assert(!(URCU_TLS(rcu_reader).ctr & RCU_GP_CTR_NEST_MASK));
 
 	mutex_lock(&rcu_gp_lock);
 	rcu_init();	/* In case gcc does not support constructor attribute */
-	cds_list_add(&rcu_reader.node, &registry);
+	cds_list_add(&URCU_TLS(rcu_reader).node, &registry);
 	mutex_unlock(&rcu_gp_lock);
 }
 
 void rcu_unregister_thread(void)
 {
 	mutex_lock(&rcu_gp_lock);
-	cds_list_del(&rcu_reader.node);
+	cds_list_del(&URCU_TLS(rcu_reader).node);
 	mutex_unlock(&rcu_gp_lock);
 }
 
@@ -386,7 +402,7 @@ static void sigrcu_handler(int signo, siginfo_t *siginfo, void *context)
 	 * executed on.
 	 */
 	cmm_smp_mb();
-	_CMM_STORE_SHARED(rcu_reader.need_mb, 0);
+	_CMM_STORE_SHARED(URCU_TLS(rcu_reader).need_mb, 0);
 	cmm_smp_mb();
 }
 
@@ -411,10 +427,8 @@ void rcu_init(void)
 	act.sa_flags = SA_SIGINFO | SA_RESTART;
 	sigemptyset(&act.sa_mask);
 	ret = sigaction(SIGRCU, &act, NULL);
-	if (ret) {
-		perror("Error in sigaction");
-		exit(-1);
-	}
+	if (ret)
+		urcu_die(errno);
 }
 
 void rcu_exit(void)
@@ -423,14 +437,15 @@ void rcu_exit(void)
 	int ret;
 
 	ret = sigaction(SIGRCU, NULL, &act);
-	if (ret) {
-		perror("Error in sigaction");
-		exit(-1);
-	}
+	if (ret)
+		urcu_die(errno);
 	assert(act.sa_sigaction == sigrcu_handler);
 	assert(cds_list_empty(&registry));
 }
 
 #endif /* #ifdef RCU_SIGNAL */
 
+DEFINE_RCU_FLAVOR(rcu_flavor);
+
 #include "urcu-call-rcu-impl.h"
+#include "urcu-defer-impl.h"