tss_get

 

C

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Concurrency support (C11)

Technical Specifications

Symbol index

 

Concurrency support library

Threads thrd_create thrd_equal thrd_current    thrd_sleep thrd_yield thrd_exit thrd_detach thrd_join thrd_successthrd_timedoutthrd_busythrd_nomemthrd_error    Atomic operations atomic_init ATOMIC_VAR_INIT (until C23) ATOMIC_***_LOCK_FREE atomic_is_lock_free atomic_store atomic_load atomic_exchange atomic_compare_exchange atomic_fetch_add atomic_fetch_sub atomic_fetch_or atomic_fetch_xor atomic_fetch_and

Atomic flags atomic_flag ATOMIC_FLAG_INIT atomic_flag_test_and_set atomic_flag_clear Memory ordering memory_order kill_dependency atomic_thread_fence atomic_signal_fence Mutual exclusion mtx_init mtx_lock mtx_timedlock mtx_trylock call_once mtx_unlock mtx_destroy mtx_plainmtx_recursivemtx_timed Condition variables cnd_init cnd_signal cnd_broadcast cnd_wait cnd_timedwait cnd_destroy Thread-local storage thread_local TSS_DTOR_ITERATIONS    tss_create tss_get tss_set tss_delete

 

Defined in header <threads.h>
void *tss_get( tss_t tss_key );		(since C11)

Returns the value held in thread-specific storage for the current thread identified by tss_key. Different threads may get different values identified by the same key.

On thread startup (see thrd_create), the values associated with all TSS keys are NULL. Different value may be placed in the thread-specific storage with tss_set.

Parameters

tss_key

-

thread-specific storage key, obtained from tss_create and not deleted by tss_delete

Return value

The value on success, NULL on failure.

Notes

The POSIX equivalent for this function is pthread_getspecific.

References

• C17 standard (ISO/IEC 9899:2018):

• 7.26.6.3 The tss_get function (p: 282)

• C11 standard (ISO/IEC 9899:2011):

• 7.26.6.3 The tss_get function (p: 386)

See also

tss_set (C11)

write to thread-specific storage (function)