summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads.old/join.c
diff options
context:
space:
mode:
authorLeonid Lisovskiy <lly.dev@gmail.com>2016-01-03 21:49:51 +0300
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-01-06 23:54:29 +0100
commitc1b5c59ece6b223f2941769ec484da4d0dc2baa6 (patch)
tree929db231c662b8fd10248aa5ec920113b62b7024 /libpthread/linuxthreads.old/join.c
parent16fc66a4faf631fffa518eb7806ec70e03c78f63 (diff)
linuxthreads.old: Implement pthread_tryjoin_np(), pthread_timedjoin_np()
Some applications needs it. Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>
Diffstat (limited to 'libpthread/linuxthreads.old/join.c')
-rw-r--r--libpthread/linuxthreads.old/join.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/join.c b/libpthread/linuxthreads.old/join.c
index 4a7c0d8ac..c7e547951 100644
--- a/libpthread/linuxthreads.old/join.c
+++ b/libpthread/linuxthreads.old/join.c
@@ -192,6 +192,144 @@ int pthread_join(pthread_t thread_id, void ** thread_return)
return 0;
}
+int pthread_tryjoin_np(pthread_t thread_id, void ** thread_return)
+{
+ volatile pthread_descr self = thread_self();
+ struct pthread_request request;
+ pthread_handle handle = thread_handle(thread_id);
+ pthread_descr th;
+ int result = 0;
+
+ /* Make sure the descriptor is valid. */
+ __pthread_lock(&handle->h_lock, self);
+ if (invalid_handle(handle, thread_id)) {
+ result = ESRCH;
+ goto err;
+ }
+ th = handle->h_descr;
+ /* Is the thread joinable?. */
+ if (th->p_detached || th->p_joining != NULL) {
+ result = EINVAL;
+ goto err;
+ }
+ if (th == self) {
+ result = EDEADLK;
+ goto err;
+ }
+ /* Return right away if the thread hasn't terminated yet. */
+ if (! th->p_terminated) {
+ result = EBUSY;
+ goto err;
+ }
+
+ /* Get return value */
+ if (thread_return != NULL) *thread_return = th->p_retval;
+ __pthread_unlock(&handle->h_lock);
+ /* Send notification to thread manager */
+ if (__pthread_manager_request >= 0) {
+ request.req_thread = self;
+ request.req_kind = REQ_FREE;
+ request.req_args.free.thread_id = thread_id;
+ TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ }
+ return 0;
+
+err:
+ __pthread_unlock(&handle->h_lock);
+ return result;
+}
+
+int pthread_timedjoin_np(pthread_t thread_id, void ** thread_return,
+ const struct timespec *abstime)
+{
+ volatile pthread_descr self = thread_self();
+ struct pthread_request request;
+ pthread_handle handle = thread_handle(thread_id);
+ pthread_descr th;
+ pthread_extricate_if extr;
+ int already_canceled = 0;
+ int result = 0;
+ PDEBUG("\n");
+
+ /* Set up extrication interface */
+ extr.pu_object = handle;
+ extr.pu_extricate_func = join_extricate_func;
+
+ __pthread_lock(&handle->h_lock, self);
+ if (invalid_handle(handle, thread_id)) {
+ result = ESRCH;
+ goto err;
+ }
+ th = handle->h_descr;
+ if (th == self) {
+ result = EDEADLK;
+ goto err;
+ }
+ /* If detached or already joined, error */
+ if (th->p_detached || th->p_joining != NULL) {
+ result = EINVAL;
+ goto err;
+ }
+ /* If not terminated yet, suspend ourselves. */
+ if (! th->p_terminated) {
+ /* Register extrication interface */
+ __pthread_set_own_extricate_if(self, &extr);
+ if (!(THREAD_GETMEM(self, p_canceled)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE))
+ th->p_joining = self;
+ else
+ already_canceled = 1;
+ __pthread_unlock(&handle->h_lock);
+
+ if (already_canceled) {
+ __pthread_set_own_extricate_if(self, 0);
+ __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
+ }
+
+ PDEBUG("before suspend\n");
+ result = (timedsuspend(self, abstime) == 0) ? ETIMEDOUT : 0;
+ PDEBUG("after suspend\n");
+ /* Deregister extrication interface */
+ __pthread_set_own_extricate_if(self, 0);
+
+ /* This is a cancellation point */
+ if (result == 0
+ && THREAD_GETMEM(self, p_woken_by_cancel)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) {
+ THREAD_SETMEM(self, p_woken_by_cancel, 0);
+ __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
+ }
+ __pthread_lock(&handle->h_lock, self);
+ }
+
+ /* We might have timed out. */
+ if (result == 0) {
+ /* Get return value */
+ if (thread_return != NULL) *thread_return = th->p_retval;
+ }
+ else
+ th->p_joining = NULL;
+
+ __pthread_unlock(&handle->h_lock);
+
+ if (result == 0) {
+ /* Send notification to thread manager */
+ if (__pthread_manager_request >= 0) {
+ request.req_thread = self;
+ request.req_kind = REQ_FREE;
+ request.req_args.free.thread_id = thread_id;
+ TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ }
+ }
+ return result;
+
+err:
+ __pthread_unlock(&handle->h_lock);
+ return result;
+}
+
int pthread_detach(pthread_t thread_id)
{
int terminated;