/**
* @brief Free a pthread read/write lock attributes object.
* @see pthread_rwlockattr_destroy()
* @param attr a pointer to the read/write lock attributes object to be freed.
* @return 0 on success or an error number on failure.
*/
int rwlock_attr_destroy(pthread_rwlockattr_t *attr) {
#ifdef MAGMA_PEDANTIC
int result = pthread_rwlockattr_destroy(attr);
if (result) log_pedantic("Could not destroy the read/write lock attribute object. {pthread_rwlockattr_destroy = %i}", result);
return result;
#else
return pthread_rwlockattr_destroy(attr);
#endif
}
int get_thread_attr()
{
pthread_attr_t attr;
pthread_attr_init(&attr);
print_thread_attr(&attr);
pthread_attr_destroy(&attr);
printf("\n");
pthread_mutexattr_t mutex_attr;
pthread_mutexattr_init(&mutex_attr);
print_mutexattr(&mutex_attr);
pthread_mutexattr_destroy(&mutex_attr);
printf("\n");
pthread_rwlockattr_t rwlock_attr;
pthread_rwlockattr_init(&rwlock_attr);
print_rwlockattr(&rwlock_attr);
pthread_rwlockattr_destroy(&rwlock_attr);
printf("\n");
pthread_condattr_t cond_attr;
pthread_condattr_init(&cond_attr);
print_condattr(&cond_attr);
pthread_condattr_destroy(&cond_attr);
printf("\n");
return THREAD_ATTR_OK;
}
void test_rwlock_init(void) {
int rc;
pthread_rwlockattr_t attrs;
rc = pthread_rwlockattr_init(&attrs);
ASSERT_EQ(rc, 0);
int shared = -1;
rc = pthread_rwlockattr_getpshared(&attrs, &shared);
ASSERT_EQ(rc, 0);
ASSERT_EQ(shared, PTHREAD_PROCESS_PRIVATE);
rc = pthread_rwlockattr_setpshared(&attrs, PTHREAD_PROCESS_SHARED);
#ifndef __GLIBC__
/*
* glibc's pthread_rwlockattr_setpshared doesn't currently fail
* with PTHREAD_PROCESS_SHARED. TODO(sbc): remove this once
* we fix the glibc bug:
* https://code.google.com/p/nativeclient/issues/detail?id=4142
*/
ASSERT_EQ(rc, EINVAL);
#endif
rc = pthread_rwlockattr_setpshared(&attrs, PTHREAD_PROCESS_PRIVATE);
ASSERT_EQ(rc, 0);
rc = pthread_rwlock_init(&g_rwlock, &attrs);
ASSERT_EQ(rc, 0);
rc = pthread_rwlockattr_destroy(&attrs);
ASSERT_EQ(rc, 0);
}
struct uwsgi_lock_item *uwsgi_rwlock_fast_init(char *id) {
#ifdef OBSOLETE_LINUX_KERNEL
return uwsgi_lock_fast_init(id);
#else
pthread_rwlockattr_t attr;
struct uwsgi_lock_item *uli = uwsgi_register_lock(id, 1);
if (pthread_rwlockattr_init(&attr)) {
uwsgi_log("unable to allocate rwlock structure\n");
exit(1);
}
if (pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED)) {
uwsgi_log("unable to share rwlock\n");
exit(1);
}
if (pthread_rwlock_init((pthread_rwlock_t *) uli->lock_ptr, &attr)) {
uwsgi_log("unable to initialize rwlock\n");
exit(1);
}
pthread_rwlockattr_destroy(&attr);
uli->can_deadlock = 1;
return uli;
#endif
}
int tsm_disconnect(TSMDevice * shm_device)
{
int ret;
ret = TSM_SUCCESS;
// if we had a read/write lock, destroy it first
if (shm_device->rwlock_addr != NULL) {
ret = pthread_rwlockattr_destroy(&shm_device->rwlattr);
if (ret == -1) {
perror("tsm_disconnect SHARED MEMORY DESTROY LOCK ATTRIBUTES FAILED");
}
ret = pthread_rwlock_destroy(shm_device->rwlock_addr);
if (ret == -1) {
perror("tsm_disconnect SHARED MEMORY DESTROY LOCK FAILED");
}
}
ret = shmdt(shm_device->addr);
if (ret == -1) {
perror("tsm_disconnect SHARED MEMORY DETACH FAILED");
}
return (ret);
}
int main()
{
pthread_rwlockattr_t rwa;
pthread_rwlock_t rwl1, rwl2;
int rc;
/* Initialize a read-write lock attributes object */
rc = pthread_rwlockattr_init(&rwa);
if (rc != 0)
{
printf("Error at pthread_rwlockattr_init(), returns %d\n", rc);
return PTS_UNRESOLVED;
}
if ((rc = pthread_rwlock_init(&rwl1, &rwa)) != 0)
{
printf("Error at 1st pthread_rwlock_init()\n");
return PTS_UNRESOLVED;
}
if ((rc = pthread_rwlock_init(&rwl2, &rwa)) != 0)
{
printf("Error at 2nd pthread_rwlock_init()\n");
return PTS_UNRESOLVED;
}
if ((rc = pthread_rwlock_rdlock(&rwl1)) != 0)
{
printf("Error at pthread_rwlock_rdlock(): rwl1\n");
return PTS_UNRESOLVED;
}
if ((rc = pthread_rwlockattr_destroy(&rwa)) != 0)
{
printf("Error at pthread_rwlockattr_destory()\n");
return PTS_UNRESOLVED;
}
if ((rc = pthread_rwlock_unlock(&rwl1)) != 0)
{
printf("Error at pthread_rwlock_unlock: rwl1\n");
printf("Test Failed.\n");
return PTS_FAIL;
}
if ((rc = pthread_rwlock_rdlock(&rwl2)) != 0)
{
printf("Error at pthread_rwlock_rdlock():rwl2\n");
printf("Test Failed.\n");
return PTS_FAIL;
}
if ((rc = pthread_rwlock_unlock(&rwl2)) != 0)
{
printf("Error at pthread_rwlock_unlock:rwl2\n");
printf("Test Failed.\n");
return PTS_FAIL;
}
printf("Test PASSED\n");
return PTS_PASS;
}
int __ast_rwlock_init(int tracking, const char *filename, int lineno, const char *func, const char *rwlock_name, ast_rwlock_t *t)
{
int res;
pthread_rwlockattr_t attr;
#ifdef DEBUG_THREADS
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) && defined(CAN_COMPARE_MUTEX_TO_INIT_VALUE)
int canlog = strcmp(filename, "logger.c") & t->tracking;
if (t->lock != ((pthread_rwlock_t) __AST_RWLOCK_INIT_VALUE)) {
__ast_mutex_logger("%s line %d (%s): Warning: rwlock '%s' is already initialized.\n",
filename, lineno, func, rwlock_name);
return 0;
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if ((t->tracking = tracking)) {
ast_reentrancy_init(&t->track);
}
#endif /* DEBUG_THREADS */
pthread_rwlockattr_init(&attr);
#ifdef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP
pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP);
#endif
res = pthread_rwlock_init(&t->lock, &attr);
pthread_rwlockattr_destroy(&attr);
return res;
}
/** \brief Initialize the rwlock taking the rwlock attributes into account
*
* \b os_rwlockInit calls \b pthread_rwlock_init to intialize the posix
* \b rwlock.
*
* In case the scope attribute is \b OS_SCOPE_SHARED, the posix
* \b rwlock "pshared" attribute is set to \b PTHREAD_PROCESS_SHARED
* otherwise it is set to \b PTHREAD_PROCESS_PRIVATE.
*/
os_result
os_rwlockInit (
os_rwlock *rwlock,
const os_rwlockAttr *rwlockAttr)
{
pthread_rwlockattr_t rwattr;
int result;
os_result rv;
assert (rwlock != NULL);
assert (rwlockAttr != NULL);
pthread_rwlockattr_init (&rwattr);
if (rwlockAttr->scopeAttr == OS_SCOPE_SHARED) {
result = pthread_rwlockattr_setpshared (&rwattr, PTHREAD_PROCESS_SHARED);
} else {
result = pthread_rwlockattr_setpshared (&rwattr, PTHREAD_PROCESS_PRIVATE);
}
if (result == 0) {
pthread_rwlock_init (rwlock, &rwattr);
}
pthread_rwlockattr_destroy (&rwattr);
if (result == 0) {
rv = os_resultSuccess;
} else {
rv = os_resultFail;
}
return rv;
}
int main(void)
{
pthread_rwlockattr_t rwla;
int rc;
/* Initialize a rwlock attributes object */
rc = pthread_rwlockattr_init(&rwla);
if (rc != 0) {
printf("Error at pthread_rwlockattr_init(), error code: %d\n",
rc);
return PTS_UNRESOLVED;
}
/* Destroy the rwlock attributes object */
rc = pthread_rwlockattr_destroy(&rwla);
if (rc != 0) {
printf
("Error at pthread_rwlockattr_destroy(), error code: %d\n",
rc);
printf("Test FAILED\n");
return PTS_FAIL;
}
printf("Test PASSED\n");
return PTS_PASS;
}
/* The 'offset' parameter is optional, but must be provided to be able to use heap_remove().
* If heap_remove() will not be used, then a negative value can be provided.
*/
heap_t heap_new(int height, ssize_t offset, int cmp(const void *x, const void *y)) {
heap_t heap;
pthread_mutexattr_t attr;
pthread_rwlockattr_t rwattr;
if (height <= 0)
height = 8;
if (cmp == NULL)
return NULL;
if (NEW(heap) == NULL)
return NULL;
heap->avail = (height << 1) - 1;
heap->curr = 0;
if ((heap->h = CALLOC(1, heap->avail * sizeof *heap->h)) == NULL) {
FREE(heap);
return NULL;
}
heap->offset = offset;
heap->cmp = cmp;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
pthread_mutex_init(&heap->lock, &attr);
pthread_mutexattr_destroy(&attr);
pthread_rwlockattr_init(&rwattr);
pthread_rwlockattr_setkind_np(&rwattr, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
pthread_rwlock_init(&heap->rwlock, &rwattr);
pthread_rwlockattr_destroy(&rwattr);
return heap;
}
vp_lock_t *vp_lock_new(pthread_mutexattr_t *ma, pthread_condattr_t *ca)
{
vp_lock_t *l;
#ifdef HAVE_PTHREAD_RWLOCKS
pthread_rwlockattr_t attr;
#endif
l = calloc(1,sizeof(*l));
AN(l);
l->magic = VP_LOCK_MAGIC;
#ifndef HAVE_PTHREAD_RWLOCKS
l->r = l->w = l->nw = 0;
l->t = vp_lock_unset;
AZ(pthread_mutex_init(&l->m,ma));
AZ(pthread_cond_init(&l->c,ca));
#else
AZ(pthread_rwlockattr_init(&attr));
#ifdef HAVE_PTHREAD_RWLOCKATTR_SETPSHARED
AZ(pthread_rwlockattr_setpshared(&attr,PTHREAD_PROCESS_PRIVATE));
#endif
AZ(pthread_rwlock_init(&l->l,&attr));
AZ(pthread_rwlockattr_destroy(&attr));
#endif
return l;
}
int
do_test (void)
{
xpthread_rwlockattr_init (&mylock_attr);
xpthread_rwlockattr_setkind_np (&mylock_attr,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
xpthread_rwlock_init (&mylock, &mylock_attr);
for (int n = 0; n < LOOPS; n++)
{
pthread_t tids[NTHREADS];
do_exit = 0;
for (int i = 0; i < NTHREADS; i++)
tids[i] = xpthread_create (NULL, run_loop, NULL);
/* Let the threads run for some time. */
sleep (1);
printf ("Exiting...");
fflush (stdout);
do_exit = 1;
for (int i = 0; i < NTHREADS; i++)
xpthread_join (tids[i]);
printf ("done.\n");
}
pthread_rwlock_destroy (&mylock);
pthread_rwlockattr_destroy (&mylock_attr);
return 0;
}
CRWLock::CRWLock()
{
pthread_rwlockattr_t rwlock_attr;
int res;
if((res = pthread_rwlockattr_init(&rwlock_attr)) != 0)
{
printf("file: "__FILE__", line: %d, " \
"call pthread_rwlockattr_init failed, err: %s\n", \
__LINE__, strerror(res));
throw res;
}
if((res = pthread_rwlockattr_setpshared(&rwlock_attr, \
PTHREAD_PROCESS_SHARED)) != 0)
{
printf("file: "__FILE__", line: %d, " \
"set rwlock attr to PTHREAD_PROCESS_SHARED failed, err: %s\n", \
__LINE__, strerror(res));
throw res;
}
if((res = pthread_rwlock_init(&m_rwlock, &rwlock_attr)) != 0)
{
printf("file: "__FILE__", line: %d, " \
"call pthread_rwlock_init failed, err: %s\n", \
__LINE__, strerror(res));
throw res;
}
pthread_rwlockattr_destroy(&rwlock_attr);
}
int main()
{
int cnt = 0;
pthread_rwlockattr_t rwlockattr;
if(pthread_rwlockattr_init(&rwlockattr) != 0)
{
printf("Error at pthread_rwlockattr_init()\n");
return PTS_UNRESOLVED;
}
if(pthread_rwlock_init(&rwlock, &rwlockattr) != 0)
{
printf("Test FAILED: Error in pthread_rwlock_init()\n");
return PTS_FAIL;
}
while(cnt++ < COUNT)
{
if(pthread_rwlock_rdlock(&rwlock) != 0)
{
printf("Test FAILED: cannot get read lock on %dth loop\n", cnt);
return PTS_FAIL;
}
if(pthread_rwlock_unlock(&rwlock) != 0)
{
printf("Test FAILED: cannot release read lock on %dth loop\n", cnt);
return PTS_FAIL;
}
if(pthread_rwlock_wrlock(&rwlock) != 0)
{
printf("Test FAILED: cannot get write lock on %dth loop\n", cnt);
return PTS_FAIL;
}
if(pthread_rwlock_unlock(&rwlock) != 0)
{
printf("Test FAILED: cannot release write lock on %dth loop\n", cnt);
return PTS_FAIL;
}
}
if(pthread_rwlock_destroy(&rwlock) != 0)
{
printf("Error at pthread_rwlockattr_destroy()\n");
return PTS_UNRESOLVED;
}
if(pthread_rwlockattr_destroy(&rwlockattr) != 0)
{
printf("Error at pthread_rwlockattr_destroy()\n");
return PTS_UNRESOLVED;
}
printf("Test PASSED\n");
return PTS_PASS;
}
CUserQueryWorkThreads::~CUserQueryWorkThreads() {
// TODO Auto-generated destructor stub
pthread_rwlock_destroy(&p_rwlock);
pthread_rwlockattr_destroy(&p_rwlock_attr);
if(m_vecTaskBuf[m_uiThreadId]) {
delete m_vecTaskBuf[m_uiThreadId];
}
}
RWLock::RWLock(string name_): rwname(name_)
{
pthread_rwlockattr_t attr;
pthread_rwlockattr_init(&attr);
pthread_rwlock_init(&rwlock, &attr);
pthread_rwlockattr_destroy(&attr);
}
CRWLock::CRWLock()
{
pthread_rwlockattr_t attr;
pthread_rwlockattr_init( &attr );
//写锁优先，一旦有写锁去请求，后续所有的读锁请求都会阻塞，即使已经有线程获取了读锁也如此
pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
pthread_rwlock_init(&_rwlock,&attr);
pthread_rwlockattr_destroy(&attr);
}
CRWMutex::~CRWMutex()
{
#ifndef ANDROID
pthread_rwlock_destroy(&mMutex);
pthread_rwlockattr_destroy(&mAttr);
#else
rwlock_deinit(&mMutex);
#endif //ANDROID
}
static int my_pthread_rwlockattr_destroy(pthread_rwlockattr_t *__attr)
{
int ret;
pthread_rwlockattr_t *realattr = (pthread_rwlockattr_t *) *(unsigned int *) __attr;
ret = pthread_rwlockattr_destroy(realattr);
free(realattr);
return ret;
}
ReadWriteLock::~ReadWriteLock()
{
#ifdef TARGET_OS_WINDOWS
CloseHandle(rdgreen);
CloseHandle(wrgreen);
DeleteCriticalSection(&rwcs);
#else
pthread_rwlock_destroy(&m_rwlock);
pthread_rwlockattr_destroy(&m_rwlockAttr);
#endif
}
static int
do_test (void)
{
size_t cnt;
for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
{
pthread_rwlock_t r;
pthread_rwlockattr_t a;
if (pthread_rwlockattr_init (&a) != 0)
FAIL_EXIT1 ("round %Zu: rwlockattr_t failed\n", cnt);
if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
FAIL_EXIT1 ("round %Zu: rwlockattr_setkind failed\n", cnt);
if (pthread_rwlock_init (&r, &a) != 0)
FAIL_EXIT1 ("round %Zu: rwlock_init failed\n", cnt);
if (pthread_rwlockattr_destroy (&a) != 0)
FAIL_EXIT1 ("round %Zu: rwlockattr_destroy failed\n", cnt);
struct timespec ts;
xclock_gettime (CLOCK_REALTIME, &ts);
++ts.tv_sec;
/* Get a read lock. */
if (pthread_rwlock_timedrdlock (&r, &ts) != 0)
FAIL_EXIT1 ("round %Zu: rwlock_timedrdlock failed\n", cnt);
printf ("%zu: got timedrdlock\n", cnt);
pthread_t th;
if (pthread_create (&th, NULL, tf, &r) != 0)
FAIL_EXIT1 ("round %Zu: create failed\n", cnt);
void *status;
if (pthread_join (th, &status) != 0)
FAIL_EXIT1 ("round %Zu: join failed\n", cnt);
if (status != NULL)
FAIL_EXIT1 ("failure in round %Zu\n", cnt);
if (pthread_rwlock_destroy (&r) != 0)
FAIL_EXIT1 ("round %Zu: rwlock_destroy failed\n", cnt);
}
return 0;
}
qp_rwlock_t
qp_rwlock_create(qp_rwlock_t rwlock, bool shared)
{
pthread_rwlockattr_t attr;
if (NULL == rwlock) {
rwlock = (qp_rwlock_t)qp_alloc(sizeof(struct qp_ipc_rwlock_s));
if (NULL == rwlock) {
return NULL;
}
memset(rwlock, 0, sizeof(struct qp_ipc_rwlock_s));
qp_rwlock_set_alloced(rwlock);
} else {
memset(rwlock, 0, sizeof(struct qp_ipc_rwlock_s));
}
if (QP_SUCCESS != pthread_rwlockattr_init(&attr)) {
qp_rwlock_is_alloced(rwlock) ? qp_free(rwlock) : 1;
return NULL;
}
#ifdef _POSIX_THREAD_PROCESS_SHARED
if (shared) {
if (QP_SUCCESS != pthread_rwlockattr_setpshared(&attr, \
PTHREAD_PROCESS_SHARED))
{
qp_rwlock_is_alloced(rwlock) ? qp_free(rwlock) : 1;
return NULL;
}
qp_rwlock_set_shared(rwlock);
}
#endif
if (QP_SUCCESS != pthread_rwlock_init(&(rwlock->rwlock), &attr)) {
qp_rwlock_is_alloced(rwlock) ? qp_free(rwlock) : 1;
return NULL;
}
pthread_rwlockattr_destroy(&attr);
qp_rwlock_set_inited(rwlock);
return rwlock;
}
void gdnsd_prcu_setup_lock(void) {
int pthread_err;
pthread_rwlockattr_t lockatt;
if((pthread_err = pthread_rwlockattr_init(&lockatt)))
log_fatal("pthread_rwlockattr_init() failed: %s", dmn_logf_strerror(pthread_err));
// Non-portable way to boost writer priority. Our writelocks are held very briefly
// and very rarely, whereas the readlocks could be very spammy, and we don't want to
// block the write operation forever. This works on Linux+glibc.
# ifdef PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
if((pthread_err = pthread_rwlockattr_setkind_np(&lockatt, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)))
log_fatal("pthread_rwlockattr_setkind_np(PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP) failed: %s", dmn_logf_strerror(pthread_err));
# endif
if((pthread_err = pthread_rwlock_init(&gdnsd_prcu_rwlock, &lockatt)))
log_fatal("pthread_rwlock_init() failed: %s", dmn_logf_strerror(pthread_err));
if((pthread_err = pthread_rwlockattr_destroy(&lockatt)))
log_fatal("pthread_rwlockattr_destroy() failed: %s", dmn_logf_strerror(pthread_err));
}
/**
* Allocate a new Video mixer
*
* @param mixp Pointer to allocated video mixer
*
* @return 0 for success, otherwise error code
*/
int vidmix_alloc(struct vidmix **mixp)
{
pthread_rwlockattr_t attr;
struct vidmix *mix;
int err;
if (!mixp)
return EINVAL;
mix = mem_zalloc(sizeof(*mix), destructor);
if (!mix)
return ENOMEM;
err = pthread_rwlockattr_init(&attr);
if (err) {
mem_deref(mix);
return err;
}
#if defined(LINUX) && defined(__GLIBC__)
err = pthread_rwlockattr_setkind_np(&attr,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
if (err)
goto out;
#endif
err = pthread_rwlock_init(&mix->rwlock, &attr);
if (err)
goto out;
mix->initialized = true;
out:
(void)pthread_rwlockattr_destroy(&attr);
if (err)
mem_deref(mix);
else
*mixp = mix;
return err;
}
process_cache::process_cache(size_t m) :
memsize(m)
{
pthread_mutexattr_t a;
pthread_rwlockattr_t al;
if(
pthread_mutexattr_init(&a)
|| pthread_mutexattr_setpshared(&a,PTHREAD_PROCESS_SHARED)
|| pthread_mutex_init(&lru_mutex,&a)
|| pthread_mutexattr_destroy(&a)
|| pthread_rwlockattr_init(&al)
|| pthread_rwlockattr_setpshared(&al,PTHREAD_PROCESS_SHARED)
|| pthread_rwlock_init(&access_lock,&al)
|| pthread_rwlockattr_destroy(&al))
{
throw cppcms_error(errno,"Failed setup mutexes --- is this system "
"supports process shared mutex/rwlock?");
}
};
static void
init_read_write_lock(pthread_rwlock_t* lock)
{
pthread_rwlockattr_t* pattr;
#if defined(YOG_HAVE_PTHREAD_RWLOCKATTR_INIT)
pthread_rwlockattr_t attr;
pthread_rwlockattr_init(&attr);
# if defined(YOG_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP)
pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP);
# endif
pattr = &attr;
#else
pattr = NULL;
#endif
int err;
if ((err = pthread_rwlock_init(lock, pattr)) != 0) {
YOG_BUG(NULL, "pthread_rwlock_init failed: %s", strerror(err));
}
#if defined(YOG_HAVE_PTHREAD_RWLOCKATTR_INIT) && defined(YOG_HAVE_PTHREAD_RWLOCKATTR_DESTROY)
pthread_rwlockattr_destroy(&attr);
#endif
}
TEST(pthread, pthread_rwlockattr_smoke) {
pthread_rwlockattr_t attr;
ASSERT_EQ(0, pthread_rwlockattr_init(&attr));
int pshared_value_array[] = {PTHREAD_PROCESS_PRIVATE, PTHREAD_PROCESS_SHARED};
for (size_t i = 0; i < sizeof(pshared_value_array) / sizeof(pshared_value_array[0]); ++i) {
ASSERT_EQ(0, pthread_rwlockattr_setpshared(&attr, pshared_value_array[i]));
int pshared;
ASSERT_EQ(0, pthread_rwlockattr_getpshared(&attr, &pshared));
ASSERT_EQ(pshared_value_array[i], pshared);
}
int kind_array[] = {PTHREAD_RWLOCK_PREFER_READER_NP,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP};
for (size_t i = 0; i < sizeof(kind_array) / sizeof(kind_array[0]); ++i) {
ASSERT_EQ(0, pthread_rwlockattr_setkind_np(&attr, kind_array[i]));
int kind;
ASSERT_EQ(0, pthread_rwlockattr_getkind_np(&attr, &kind));
ASSERT_EQ(kind_array[i], kind);
}
ASSERT_EQ(0, pthread_rwlockattr_destroy(&attr));
}
int main(void)
{
pthread_rwlockattr_t rwla;
int pshared;
#ifndef PTHREAD_PROCESS_SHARED
printf("process-shared attribute is not available for testing\n");
return PTS_UNSUPPORTED;
#endif
/* Initialize a rwlock attributes object */
if (pthread_rwlockattr_init(&rwla) != 0) {
printf("Error at pthread_rwlockattr_init()\n");
return PTS_UNRESOLVED;
}
/* The default 'pshared' attribute should be PTHREAD_PROCESS_PRIVATE */
if (pthread_rwlockattr_getpshared(&rwla, &pshared) != 0) {
printf("Error at pthread_rwlockattr_getpshared()\n");
return PTS_UNRESOLVED;
}
if (pshared != PTHREAD_PROCESS_PRIVATE) {
printf("Test FAILED: Incorrect default pshared value: %d\n",
pshared);
return PTS_FAIL;
}
/* Cleanup */
if ((pthread_rwlockattr_destroy(&rwla)) != 0) {
printf("Error at pthread_rwlockattr_destroy()\n");
return PTS_UNRESOLVED;
}
printf("Test PASSED\n");
return PTS_PASS;
}
struct hash_table *
hashtable_init(struct hash_param *hparam)
{
/* The hash table being constructed */
struct hash_table *ht = NULL;
/* The index for initializing each partition */
uint32_t index = 0;
/* Read-Write Lock attributes, to prevent write starvation under
GLIBC */
pthread_rwlockattr_t rwlockattr;
/* Hash partition */
struct hash_partition *partition = NULL;
/* The number of fully initialized partitions */
uint32_t completed = 0;
if (pthread_rwlockattr_init(&rwlockattr) != 0)
return NULL;
/* At some point factor this out into the OS directory. it is
necessary to prevent writer starvation under GLIBC. */
#ifdef GLIBC
if ((pthread_rwlockattr_setkind_np
(&rwlockattrs,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)) != 0) {
LogCrit(COMPONENT_HASHTABLE,
"Unable to set writer-preference on lock attribute.");
goto deconstruct;
}
#endif /* GLIBC */
ht = gsh_calloc(1, sizeof(struct hash_table) +
(sizeof(struct hash_partition) *
hparam->index_size));
/* Fixup entry size */
if (hparam->flags & HT_FLAG_CACHE) {
if (!hparam->cache_entry_count)
/* works fine with a good hash algo */
hparam->cache_entry_count = 32767;
}
/* We need to save copy of the parameters in the table. */
ht->parameter = *hparam;
for (index = 0; index < hparam->index_size; ++index) {
partition = (&ht->partitions[index]);
RBT_HEAD_INIT(&(partition->rbt));
if (pthread_rwlock_init(&partition->lock, &rwlockattr) != 0) {
LogCrit(COMPONENT_HASHTABLE,
"Unable to initialize lock in hash table.");
goto deconstruct;
}
/* Allocate a cache if requested */
if (hparam->flags & HT_FLAG_CACHE)
partition->cache = gsh_calloc(1, cache_page_size(ht));
completed++;
}
ht->node_pool = pool_basic_init(NULL, sizeof(rbt_node_t));
ht->data_pool = pool_basic_init(NULL, sizeof(struct hash_data));
pthread_rwlockattr_destroy(&rwlockattr);
return ht;
deconstruct:
while (completed != 0) {
if (hparam->flags & HT_FLAG_CACHE)
gsh_free(ht->partitions[completed - 1].cache);
PTHREAD_RWLOCK_destroy(&(ht->partitions[completed - 1].lock));
completed--;
}
if (ht->node_pool)
pool_destroy(ht->node_pool);
if (ht->data_pool)
pool_destroy(ht->data_pool);
gsh_free(ht);
return ht = NULL;
}
static int
do_test (void)
{
pthread_rwlock_t r;
pthread_rwlockattr_t at;
int e;
if (pthread_rwlockattr_init (&at) != 0)
{
puts ("rwlockattr_init failed");
return 1;
}
puts ("rwlockattr_init succeeded");
#ifndef TYPE
# define TYPE PTHREAD_RWLOCK_PREFER_READER_NP
#endif
if (pthread_rwlockattr_setkind_np (&at, TYPE) != 0)
{
puts ("rwlockattr_setkind failed");
return 1;
}
puts ("rwlockattr_setkind succeeded");
if (pthread_rwlock_init (&r, &at) != 0)
{
puts ("rwlock_init failed");
return 1;
}
puts ("rwlock_init succeeded");
if (pthread_rwlockattr_destroy (&at) != 0)
{
puts ("rwlockattr_destroy failed");
return 1;
}
puts ("rwlockattr_destroy succeeded");
if (pthread_rwlock_wrlock (&r) != 0)
{
puts ("1st rwlock_wrlock failed");
return 1;
}
puts ("1st rwlock_wrlock succeeded");
e = pthread_rwlock_tryrdlock (&r);
if (e == 0)
{
puts ("rwlock_tryrdlock on rwlock with writer succeeded");
return 1;
}
if (e != EBUSY)
{
puts ("rwlock_tryrdlock on rwlock with writer return value != EBUSY");
return 1;
}
puts ("rwlock_tryrdlock on rwlock with writer failed with EBUSY");
e = pthread_rwlock_trywrlock (&r);
if (e == 0)
{
puts ("rwlock_trywrlock on rwlock with writer succeeded");
return 1;
}
if (e != EBUSY)
{
puts ("rwlock_trywrlock on rwlock with writer return value != EBUSY");
return 1;
}
puts ("rwlock_trywrlock on rwlock with writer failed with EBUSY");
if (pthread_rwlock_unlock (&r) != 0)
{
puts ("1st rwlock_unlock failed");
return 1;
}
puts ("1st rwlock_unlock succeeded");
if (pthread_rwlock_tryrdlock (&r) != 0)
{
puts ("rwlock_tryrdlock on unlocked rwlock failed");
return 1;
}
puts ("rwlock_tryrdlock on unlocked rwlock succeeded");
e = pthread_rwlock_trywrlock (&r);
if (e == 0)
{
puts ("rwlock_trywrlock on rwlock with reader succeeded");
return 1;
}
if (e != EBUSY)
{
puts ("rwlock_trywrlock on rwlock with reader return value != EBUSY");
return 1;
}
puts ("rwlock_trywrlock on rwlock with reader failed with EBUSY");
if (pthread_rwlock_unlock (&r) != 0)
{
puts ("2nd rwlock_unlock failed");
return 1;
}
puts ("2nd rwlock_unlock succeeded");
if (pthread_rwlock_trywrlock (&r) != 0)
{
puts ("rwlock_trywrlock on unlocked rwlock failed");
return 1;
}
puts ("rwlock_trywrlock on unlocked rwlock succeeded");
e = pthread_rwlock_tryrdlock (&r);
if (e == 0)
{
puts ("rwlock_tryrdlock on rwlock with writer succeeded");
return 1;
}
if (e != EBUSY)
{
puts ("rwlock_tryrdlock on rwlock with writer return value != EBUSY");
return 1;
}
puts ("rwlock_tryrdlock on rwlock with writer failed with EBUSY");
if (pthread_rwlock_unlock (&r) != 0)
{
puts ("3rd rwlock_unlock failed");
return 1;
}
puts ("3rd rwlock_unlock succeeded");
if (pthread_rwlock_destroy (&r) != 0)
{
puts ("rwlock_destroy failed");
return 1;
}
puts ("rwlock_destroy succeeded");
return 0;
}
