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.
14 lines
389 B
C
14 lines
389 B
C
#include "pthread_impl.h"
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/* pthread_key_create.c overrides this */
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static const size_t dummy = 0;
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weak_alias(dummy, __pthread_tsd_size);
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int pthread_attr_setstack(pthread_attr_t *a, void *addr, size_t size)
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{
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if (size-PTHREAD_STACK_MIN-__pthread_tsd_size > SIZE_MAX/4)
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return EINVAL;
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a->_a_stackaddr = (size_t)addr + size;
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a->_a_stacksize = size - DEFAULT_STACK_SIZE;
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return 0;
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}
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