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authorRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
committerRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
commit0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch)
tree6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/thread/pthread_key_create.c
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initial check-in, version 0.5.0v0.5.0
Diffstat (limited to 'src/thread/pthread_key_create.c')
-rw-r--r--src/thread/pthread_key_create.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/thread/pthread_key_create.c b/src/thread/pthread_key_create.c
new file mode 100644
index 00000000..efc38046
--- /dev/null
+++ b/src/thread/pthread_key_create.c
@@ -0,0 +1,25 @@
+#include "pthread_impl.h"
+
+const size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX;
+
+static void nodtor(void *dummy)
+{
+}
+
+int pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
+{
+ static void (*keys[PTHREAD_KEYS_MAX])(void *);
+ int i = (uintptr_t)&k / 16 % PTHREAD_KEYS_MAX;
+ int j = i;
+
+ libc.tsd_keys = keys;
+ if (!dtor) dtor = nodtor;
+ /* Cheap trick - &k cannot match any destructor pointer */
+ while (a_cas_p(keys+j, 0, &k)
+ && (j=(j+1)%PTHREAD_KEYS_MAX) != i);
+ if (keys[j] != (void (*)(void *))&k)
+ return EAGAIN;
+ keys[j] = dtor;
+ *k = j;
+ return 0;
+}