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Merge pull request #20934 from LasseRosenow/pthread-attr-setstack

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sys/posix/pthread: Add pthread_attr_getstack and pthread_attr_setstack
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benpicco 2024-10-29 16:17:51 +00:00 committed by GitHub
commit 1fc9d1bb82
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2 changed files with 47 additions and 0 deletions
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27
sys/posix/pthread/include/pthread_threading_attr.h
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@ -202,6 +202,33 @@ int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize);
*/ */
int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize); int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
/**
* @brief Query set stacksize for new pthread.
* @param[in] attr Attribute set to query.
* @param[out] stackaddr Pointer to previously assigned stack, or `NULL` for dynamic allocation.
* @param[out] stacksize Assigned or default stack size, resp.
* @returns 0, this invocation cannot fail
*/
int pthread_attr_getstack(pthread_attr_t *attr, void **stackaddr, size_t *stacksize);
/**
* @brief Set address and stack size of the stack to use for the new pthread.
* @details This function requires setting the address as well as the size
* since only setting the address will make the implementation
* on some architectures impossible.
* If `*stackaddr == NULL`, then the stack is dynamically allocated with malloc().
* No two running threads may operate on the same stack.
* The stack of a zombie thread (i.e. a non-detached thread that exited but was not yet joined)
* may in theory be reused even before joining, though there might be problems
* if the stack was preempted before pthread_exit() completed.
* @param[in,out] attr Attribute set to operate on.
* @param[in] stackaddr Static stack to use, or `NULL` for dynamic allocation.
* @param[in] stacksize Size of the stack of the new thread.
* Supply `0` to use the default value.
* @returns 0, this invocation cannot fail
*/
int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

20
sys/posix/pthread/pthread_attr.c
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@ -158,3 +158,23 @@ int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
attr->ss_size = stacksize; attr->ss_size = stacksize;
return 0; return 0;
} }
int pthread_attr_getstack(pthread_attr_t *attr, void **stackaddr, size_t *stacksize)
{
int res = pthread_attr_getstackaddr(attr, stackaddr);
if (res != 0) {
return res;
}
return pthread_attr_getstacksize(attr, stacksize);
}
int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize)
{
int res = pthread_attr_setstackaddr(attr, stackaddr);
if (res != 0) {
return res;
}
return pthread_attr_setstacksize(attr, stacksize);
}