819006a88b
i originally omitted these (optional, per POSIX) interfaces because i considered them backwards implementation details. however, someone later brought to my attention a fairly legitimate use case: allocating thread stacks in memory that's setup for sharing and/or fast transfer between CPU and GPU so that the thread can move data to a GPU directly from automatic-storage buffers without having to go through additional buffer copies. perhaps there are other situations in which these interfaces are useful too.
10 lines
251 B
C
10 lines
251 B
C
#include "pthread_impl.h"
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int pthread_attr_getstack(const pthread_attr_t *a, void **addr, size_t *size)
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{
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if (!a->_a_stackaddr)
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return EINVAL;
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*size = a->_a_stacksize + DEFAULT_STACK_SIZE;
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*addr = (void *)(a->_a_stackaddr - *size);
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return 0;
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}
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