tss_set
From cppreference.com
| Defined in header <threads.h>
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| int tss_set( tss_t tss_id, void *val ); |
(since C11) | |
Sets the value of the thread-specific storage identified by tss_id for the current thread to val. Different threads may set different values to the same key.
The destructor, if available, is not invoked.
Contents |
[edit] Parameters
| tss_id | - | thread-specific storage key, obtained from tss_create and not deleted by tss_delete |
| val | - | value to set thread-specific storage to |
[edit] Return value
thrd_success if successful, thrd_error otherwise.
[edit] Notes
The POSIX equivalent of this function is pthread_setspecific
Typically TSS is used to store pointers to blocks of dynamically allocated memory that have been reserved for use by the calling thread.
tss_set may be called in the TSS destructor. If the destructor exits with non-NULL value in the TSS storage, it will be retried by thrd_exit up to TSS_DTOR_ITERATIONS times, after which the storage will be lost.
[edit] Example
| 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
[edit] References
- C11 standard (ISO/IEC 9899:2011):
- 7.26.6.4 The tss_set function (p: 387)
[edit] See also
| (C11) |
reads from thread-specific storage (function) |
