thrd_create

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Atomic operations (C11)

Thread support (C11)

Technical Specifications

Thread 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
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>
int thrd_create( thrd_t *thr, thrd_start_t func, void *arg );		(since C11)

Creates a new thread executing the function func. The function is invoked as func(arg).

If successful, the object pointed to by thr is set to the identifier of the new thread.

The completion of this function synchronizes-with the beginning of the thread.

Parameters

thr	-	pointer to memory location to put the identifier of the new thread
func	-	function to execute
arg	-	argument to pass to the function

Return value

thrd_success if the creation of the new thread was successful. Otherwise returns thrd_nomem if there was insufficient amount of memory or thrd_error if another error occurred.

Notes

The thread identifiers may be reused for new threads once the thread has finished and joined or detached.

The type thrd_start_t is a typedef of int(*)(void*), which differs from the POSIX equivalent void*(*)(void*)

All thread-specific storage values (see tss_create) are initialized to NULL.

Return from the function func is equivalent to calling thrd_exit with the argument equal to the return value of func.

References

• C11 standard (ISO/IEC 9899:2011):

• 7.26.5.1 The thrd_create function (p: 383)

See also

thrd_detach (C11)	detaches a thread (function)
thrd_join (C11)	blocks until a thread terminates (function)