Return Values
Returns a zero and exits when it completes successfully. Any other returned value indicates that an error occurred. When any of the following conditions are detected, thr_create() fails and returns the corresponding value.
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EAGAIN
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A system limit is exceeded, such as when too many LWPs have been created.
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ENOMEM
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Not enough memory was available to create the new thread.
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EINVAL
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stack_base is not NULL and stack_size is less than the value returned by thr_min_stack.()