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Cygwin: Implement sched_[gs]etaffinity()

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This patch set implements the Linux syscalls sched_getaffinity,
sched_setaffinity, pthread_getaffinity_np, and pthread_setaffinity_np.
Linux has a straightforward view of the cpu sets used in affinity masks.
They are simply long (1024-bit) bit masks.  This code emulates that view
while internally dealing with Windows' distribution of available CPUs among
processor groups.
This commit is contained in:
Mark Geisert
2019-06-23 14:51:06 -07:00
committed by Corinna Vinschen
parent d54edfdf81
commit 641ecb0753
11 changed files with 389 additions and 5 deletions
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19
winsup/cygwin/thread.cc
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@@ -23,6 +23,7 @@ details. */
#include "winsup.h"
#include "miscfuncs.h"
#include "path.h"
#include <sched.h>
#include <stdlib.h>
#include "sigproc.h"
#include "fhandler.h"
@@ -2606,6 +2607,24 @@ pthread_timedjoin_np (pthread_t thread, void **return_val,
return pthread::join (&thread, (void **) return_val, &timeout);
}
extern "C" int
pthread_getaffinity_np (pthread_t thread, size_t sizeof_set, cpu_set_t *set)
{
if (!pthread::is_good_object (&thread))
return ESRCH;
return sched_get_thread_affinity (thread->win32_obj_id, sizeof_set, set);
}
extern "C" int
pthread_setaffinity_np (pthread_t thread, size_t sizeof_set, const cpu_set_t *set)
{
if (!pthread::is_good_object (&thread))
return ESRCH;
return sched_set_thread_affinity (thread->win32_obj_id, sizeof_set, set);
}
extern "C" int
pthread_getattr_np (pthread_t thread, pthread_attr_t *attr)
{