X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_key_create.c;h=d112094122b316d161a6fd17f1c08d12d0b58e05;hb=bf14ef193b4203aa9a8b173faeeea06d98397f65;hp=c9ca48ab3817f13c580d73f9120cf872b185b5bd;hpb=a6054e3c94aa0491d7366e4b05ae0d73f661bfe2;p=musl

diff --git a/src/thread/pthread_key_create.c b/src/thread/pthread_key_create.c
index c9ca48ab..d1120941 100644
--- a/src/thread/pthread_key_create.c
+++ b/src/thread/pthread_key_create.c
@@ -1,49 +1,91 @@
 #include "pthread_impl.h"
 
-const size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX;
+volatile size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX;
 void *__pthread_tsd_main[PTHREAD_KEYS_MAX] = { 0 };
 
 static void (*keys[PTHREAD_KEYS_MAX])(void *);
 
+static pthread_rwlock_t key_lock = PTHREAD_RWLOCK_INITIALIZER;
+
+static pthread_key_t next_key;
+
 static void nodtor(void *dummy)
 {
 }
 
-int pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
+static void dummy_0(void)
+{
+}
+
+weak_alias(dummy_0, __tl_lock);
+weak_alias(dummy_0, __tl_unlock);
+
+int __pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
 {
-	unsigned i = (uintptr_t)&k / 16 % PTHREAD_KEYS_MAX;
-	unsigned j = i;
+	pthread_t self = __pthread_self();
+
+	/* This can only happen in the main thread before
+	 * pthread_create has been called. */
+	if (!self->tsd) self->tsd = __pthread_tsd_main;
 
-	pthread_self();
+	/* Purely a sentinel value since null means slot is free. */
 	if (!dtor) dtor = nodtor;
+
+	__pthread_rwlock_wrlock(&key_lock);
+	pthread_key_t j = next_key;
 	do {
-		if (!a_cas_p(keys+j, 0, dtor)) {
-			*k = j;
+		if (!keys[j]) {
+			keys[next_key = *k = j] = dtor;
+			__pthread_rwlock_unlock(&key_lock);
 			return 0;
 		}
-	} while ((j=(j+1)%PTHREAD_KEYS_MAX) != i);
+	} while ((j=(j+1)%PTHREAD_KEYS_MAX) != next_key);
+
+	__pthread_rwlock_unlock(&key_lock);
 	return EAGAIN;
 }
 
-int pthread_key_delete(pthread_key_t k)
+int __pthread_key_delete(pthread_key_t k)
 {
+	sigset_t set;
+	pthread_t self = __pthread_self(), td=self;
+
+	__block_app_sigs(&set);
+	__pthread_rwlock_wrlock(&key_lock);
+
+	__tl_lock();
+	do td->tsd[k] = 0;
+	while ((td=td->next)!=self);
+	__tl_unlock();
+
 	keys[k] = 0;
+
+	__pthread_rwlock_unlock(&key_lock);
+	__restore_sigs(&set);
+
 	return 0;
 }
 
 void __pthread_tsd_run_dtors()
 {
 	pthread_t self = __pthread_self();
-	int i, j, not_finished = self->tsd_used;
-	for (j=0; not_finished && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
-		not_finished = 0;
+	int i, j;
+	for (j=0; self->tsd_used && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
+		__pthread_rwlock_rdlock(&key_lock);
+		self->tsd_used = 0;
 		for (i=0; i<PTHREAD_KEYS_MAX; i++) {
-			if (self->tsd[i] && keys[i]) {
-				void *tmp = self->tsd[i];
-				self->tsd[i] = 0;
-				keys[i](tmp);
-				not_finished = 1;
+			void *val = self->tsd[i];
+			void (*dtor)(void *) = keys[i];
+			self->tsd[i] = 0;
+			if (val && dtor && dtor != nodtor) {
+				__pthread_rwlock_unlock(&key_lock);
+				dtor(val);
+				__pthread_rwlock_rdlock(&key_lock);
 			}
 		}
+		__pthread_rwlock_unlock(&key_lock);
 	}
 }
+
+weak_alias(__pthread_key_create, pthread_key_create);
+weak_alias(__pthread_key_delete, pthread_key_delete);