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Improve pthread_join()

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Since we're now on Windows 8, we can have clone() work as advertised on
Windows, where it sends a futex wake to the child tid. It's also likely
we no longer need to work around thread flakes on OpenBSD, in _wait0().
This commit is contained in:
Justine Tunney 2022-09-16 14:02:06 -07:00
parent 3733b43a8f
commit 994e1f4386
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GPG key ID: BE714B4575D6E328
19 changed files with 154 additions and 74 deletions
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18
libc/thread/pthread_join.c
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@ -16,13 +16,10 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/thread/thread.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/spawn.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
/**
* Waits for thread to terminate.
@ -31,12 +28,15 @@
* @raise EDEADLK if thread is detached
*/
int pthread_join(pthread_t thread, void **value_ptr) {
struct PosixThread *pt = (struct PosixThread *)thread;
if (pt->status == kPosixThreadDetached || //
pt->status == kPosixThreadZombie) {
assert(!"badjoin");
struct PosixThread *pt;
if (thread == __get_tls()->tib_pthread) {
return EDEADLK;
}
if (!(pt = (struct PosixThread *)thread) || //
pt->status == kPosixThreadZombie || //
pt->status == kPosixThreadDetached) {
return EINVAL;
}
_pthread_wait(pt);
if (value_ptr) {
*value_ptr = pt->rc;