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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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4
winsup/cygwin/include/cygwin/version.h
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@@ -509,12 +509,14 @@ details. */
336: New Cygwin PID algorithm (yeah, not really an API change)
337: MOUNT_BINARY -> MOUNT_TEXT
338: Export secure_getenv.
339: Export sched_getaffinity, sched_setaffinity, pthread_getaffinity_np,
pthread_setaffinity_np.
Note that we forgot to bump the api for ualarm, strtoll, strtoull,
sigaltstack, sethostname. */
#define CYGWIN_VERSION_API_MAJOR 0
#define CYGWIN_VERSION_API_MINOR 338
#define CYGWIN_VERSION_API_MINOR 339
/* There is also a compatibity version number associated with the shared memory
regions. It is incremented when incompatible changes are made to the shared

2
winsup/cygwin/include/pthread.h
View File

@@ -226,8 +226,10 @@ void pthread_testcancel (void);
/* Non posix calls */
#if __GNU_VISIBLE
int pthread_getaffinity_np (pthread_t, size_t, cpu_set_t *);
int pthread_getattr_np (pthread_t, pthread_attr_t *);
int pthread_getname_np (pthread_t, char *, size_t) __attribute__((__nonnull__(2)));
int pthread_setaffinity_np (pthread_t, size_t, const cpu_set_t *);
int pthread_setname_np (pthread_t, const char *) __attribute__((__nonnull__(2)));
int pthread_sigqueue (pthread_t *, int, const union sigval);
int pthread_timedjoin_np (pthread_t, void **, const struct timespec *);