Libc-391.2.6.tar.gz

[apple/libc.git] / pthreads / pthread_tsd.c

diff --git a/pthreads/pthread_tsd.c b/pthreads/pthread_tsd.c
index df1ee6f192428a422b7c45d95c533ec06de5956c..91cdf3c3a0c4f947965b4415e14b5223769abc83 100644 (file)
--- a/pthreads/pthread_tsd.c
+++ b/pthreads/pthread_tsd.c
@@ -59,6 +59,12 @@ static struct
        void (*destructor)(void *);
 } _pthread_keys[_POSIX_THREAD_KEYS_MAX];
 static pthread_lock_t tds_lock = LOCK_INITIALIZER;
+/*
+ * Partition _pthread_keys in a lower part that dyld can use, and an upper
+ * part for libSystem.  The libSystem part starts at __pthread_tsd_first = 4.
+ * dyld will set this value to 1.
+ */
+__private_extern__ int __pthread_tsd_first = 4;
 
 /*
  * Create a new key for thread specific data
@@ -71,7 +77,7 @@ pthread_key_create(pthread_key_t *key,
        LOCK(tds_lock);
        res = ENOMEM;  /* No 'free' keys */
        /* The first slot is reserved for pthread_self() */
-       for (i = 1;  i < _POSIX_THREAD_KEYS_MAX;  i++)
+       for (i = __pthread_tsd_first;  i < _POSIX_THREAD_KEYS_MAX;  i++)
        {
                if (_pthread_keys[i].created == FALSE)
                {
@@ -95,7 +101,7 @@ pthread_key_delete(pthread_key_t key)
        int res;
        LOCK(tds_lock);
        /* The first slot is reserved for pthread_self() */
-       if ((key > 0) && (key < _POSIX_THREAD_KEYS_MAX))
+       if ((key >= __pthread_tsd_first) && (key < _POSIX_THREAD_KEYS_MAX))
        {
                if (_pthread_keys[key].created)
                {
@@ -137,7 +143,7 @@ pthread_setspecific(pthread_key_t key,
        int res;
        pthread_t self;
        /* The first slot is reserved for pthread_self() */
-       if ((key > 0) && (key < _POSIX_THREAD_KEYS_MAX))
+       if ((key >= __pthread_tsd_first) && (key < _POSIX_THREAD_KEYS_MAX))
        {
                if (_pthread_keys[key].created)
                {
@@ -166,7 +172,7 @@ _pthread_tsd_cleanup(pthread_t self)
        for (j = 0;  j < PTHREAD_DESTRUCTOR_ITERATIONS;  j++)
        {
                /* The first slot is reserved for pthread_self() */
-               for (i = 1;  i < _POSIX_THREAD_KEYS_MAX;  i++)
+               for (i = __pthread_tsd_first;  i < _POSIX_THREAD_KEYS_MAX;  i++)
                {
                        if (_pthread_keys[i].created && (param = self->tsd[i]))
                        {