diff options
| -rw-r--r-- | nonstd/static/thread.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/nonstd/static/thread.h b/nonstd/static/thread.h index 00b40861..db66c0b7 100644 --- a/nonstd/static/thread.h +++ b/nonstd/static/thread.h @@ -1,5 +1,39 @@ +#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 201101L + +static struct per_thread *per_thread(void) +{ + _Thread_local static struct per_thread pt = {0}; + return &pt; +} + +#elif defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 199506L +#include <pthread.h> + +static pthread_key_t __per_thread_key; + +static void _make_key(void) +{ + pthread_key_create(&key, NULL); +} + +static struct per_thread *per_thread(void) +{ + static pthread_once_t key_once = PTHREAD_ONCE_INIT; + struct per_thread *pt; + pthread_once(&key_once, make_key); + if ((pt = pthread_getspecific(key)) == NULL) { + pt = calloc(1, sizeof (*pt)); + pthread_setspecific(key, pt); + } + return pt; +} + +#else + static struct per_thread *per_thread(void) { static struct per_thread pt = {0}; return &pt; } + +#endif |