*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
+#include "urcu/wfcqueue.h"
#include "urcu/map/urcu-bp.h"
-
#include "urcu/static/urcu-bp.h"
+#include "urcu-pointer.h"
+#include "urcu/tls-compat.h"
+
+#include "urcu-die.h"
+
/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
+#undef _LGPL_SOURCE
#include "urcu-bp.h"
+#define _LGPL_SOURCE
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
-#ifndef __linux__
+#ifdef __linux__
+static
+void *mremap_wrapper(void *old_address, size_t old_size,
+ size_t new_size, int flags)
+{
+ return mremap(old_address, old_size, new_size, flags);
+}
+#else
#define MREMAP_MAYMOVE 1
#define MREMAP_FIXED 2
* mremap wrapper for non-Linux systems. Maps a RW, anonymous private mapping.
* This is not generic.
*/
-void *mremap(void *old_address, size_t old_size, size_t new_size, int flags)
+static
+void *mremap_wrapper(void *old_address, size_t old_size,
+ size_t new_size, int flags)
{
- void *new_arena;
+ void *new_address;
assert(flags & MREMAP_MAYMOVE);
assert(!(flags & MREMAP_FIXED));
#define RCU_SLEEP_DELAY 1000
#define ARENA_INIT_ALLOC 16
+/*
+ * Active attempts to check for reader Q.S. before calling sleep().
+ */
+#define RCU_QS_ACTIVE_ATTEMPTS 100
+
void __attribute__((destructor)) rcu_bp_exit(void);
static pthread_mutex_t rcu_gp_lock = PTHREAD_MUTEX_INITIALIZER;
#ifdef DEBUG_YIELD
-unsigned int yield_active;
-unsigned int __thread rand_yield;
+unsigned int rcu_yield_active;
+DEFINE_URCU_TLS(unsigned int, rcu_rand_yield);
#endif
/*
* Pointer to registry elements. 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);
static CDS_LIST_HEAD(registry);
#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 (ret != EBUSY && ret != EINTR)
+ urcu_die(ret);
poll(NULL,0,10);
}
#endif /* #else #ifndef DISTRUST_SIGNALS_EXTREME */
int ret;
ret = pthread_mutex_unlock(mutex);
- if (ret) {
- perror("Error in pthread mutex unlock");
- exit(-1);
- }
+ if (ret)
+ urcu_die(ret);
}
-void update_counter_and_wait(void)
+static void update_counter_and_wait(void)
{
CDS_LIST_HEAD(qsreaders);
int wait_loops = 0;
MAP_ANONYMOUS | MAP_PRIVATE,
-1, 0);
else
- new_arena = mremap(arena->p, arena->len,
- len, MREMAP_MAYMOVE);
+ new_arena = mremap_wrapper(arena->p, arena->len,
+ len, MREMAP_MAYMOVE);
assert(new_arena != MAP_FAILED);
/*
if (registry_arena.len
< registry_arena.used + sizeof(struct rcu_reader))
resize_arena(®istry_arena,
- max(registry_arena.len << 1, ARENA_INIT_ALLOC));
+ caa_max(registry_arena.len << 1, ARENA_INIT_ALLOC));
/*
* Find a free spot.
*/
rcu_reader_reg->tid = pthread_self();
assert(rcu_reader_reg->ctr == 0);
cds_list_add(&rcu_reader_reg->node, ®istry);
- rcu_reader = rcu_reader_reg;
+ URCU_TLS(rcu_reader) = rcu_reader_reg;
}
/* Called with signals off and mutex locked */
/*
* Check if a signal concurrently registered our thread since
* the check in rcu_read_lock(). */
- if (rcu_reader)
+ if (URCU_TLS(rcu_reader))
goto end;
mutex_lock(&rcu_gp_lock);
assert(!ret);
}
-void rcu_bp_exit()
+void rcu_bp_exit(void)
{
- munmap(registry_arena.p, registry_arena.len);
+ if (registry_arena.p)
+ munmap(registry_arena.p, registry_arena.len);
}
/*
assert(!ret);
}
+void *rcu_dereference_sym_bp(void *p)
+{
+ return _rcu_dereference(p);
+}
+
+void *rcu_set_pointer_sym_bp(void **p, void *v)
+{
+ cmm_wmb();
+ uatomic_set(p, v);
+ return v;
+}
+
+void *rcu_xchg_pointer_sym_bp(void **p, void *v)
+{
+ cmm_wmb();
+ return uatomic_xchg(p, v);
+}
+
+void *rcu_cmpxchg_pointer_sym_bp(void **p, void *old, void *_new)
+{
+ cmm_wmb();
+ return uatomic_cmpxchg(p, old, _new);
+}
+
+DEFINE_RCU_FLAVOR(rcu_flavor);
+
#include "urcu-call-rcu-impl.h"
#include "urcu-defer-impl.h"