mirror of
https://github.com/fluencelabs/musl
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31fb174dd2
based on patch by Timo Teräs: While generally this is a bad API, it is the only existing API to affect c++ (std::thread) and c11 (thrd_create) thread stack size. This patch allows applications only to increate stack and guard page sizes.
36 lines
852 B
C
36 lines
852 B
C
#include "pthread_impl.h"
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#include <string.h>
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extern size_t __default_stacksize;
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extern size_t __default_guardsize;
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int pthread_setattr_default_np(const pthread_attr_t *attrp)
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{
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/* Reject anything in the attr object other than stack/guard size. */
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pthread_attr_t tmp = *attrp, zero = { 0 };
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tmp._a_stacksize = 0;
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tmp._a_guardsize = 0;
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if (memcmp(&tmp, &zero, sizeof tmp))
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return EINVAL;
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__inhibit_ptc();
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if (attrp->_a_stacksize >= __default_stacksize)
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__default_stacksize = attrp->_a_stacksize;
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if (attrp->_a_guardsize >= __default_guardsize)
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__default_guardsize = attrp->_a_guardsize;
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__release_ptc();
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return 0;
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}
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int pthread_getattr_default_np(pthread_attr_t *attrp)
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{
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__acquire_ptc();
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*attrp = (pthread_attr_t) {
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._a_stacksize = __default_stacksize,
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._a_guardsize = __default_guardsize,
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};
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__release_ptc();
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return 0;
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}
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