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Defined in header <threads.h> | ||
int tss_create(tss_t* tss_key,tss_dtor_t destructor); | (since C11) | |
Creates new thread-specific storage key and stores it in the object pointed to bytss_key. Although the same key value may be used by different threads, the values bound to the key bytss_set are maintained on a per-thread basis and persist for the life of the calling thread.
The valueNULL is associated with the newly created key in all existing threads, and upon thread creation, the values associated with all TSS keys is initialized toNULL.
Ifdestructor is not a null pointer, then also associates the destructor which is called when the storage is released bythrd_exit (but not bytss_delete and not at program termination byexit).
A call totss_create from within a thread-specific storage destructor results in undefined behavior.
Contents |
| tss_key | - | pointer to memory location to store the new thread-specific storage key |
| destructor | - | pointer to a function to call at thread exit |
The POSIX equivalent of this function ispthread_key_create.
thrd_success if successful,thrd_error otherwise.
| This section is incomplete Reason: improve, perhaps look for POSIX examples for inspiration |
int thread_func(void*arg){tss_t key;if(thrd_success== tss_create(&key,free)){tss_set(key,malloc(4));// stores a pointer on TSS// ...}}// calls free() for the pointer stored on TSS
