Fri Jul 24 21:13:55 1998 Ross Johnson <rpj@ixobrychus.canberra.edu.au>

	* cancel.c (pthread_cancel): Implement.
	(pthread_testcancel): Implement.

	* exit.c (pthread_exit): Add comment explaining the longjmp().

	* implement.h (_pthread_threads_thread_t): New member cancelthread.
	(_PTHREAD_YES): Define.
	(_PTHREAD_NO): Define.
	(RND_SIZEOF): Remove.

	* create.c (pthread_create): Rename cancelability to cancelstate.

	* pthread.h (pthread_attr_t): Rename cancelability to cancelstate.
	(PTHREAD_CANCELED): Define.

1 files changed, 38 insertions, 0 deletions

diff --git a/cancel.c b/cancel.c
index 72c41ad..e9e33f1 100644
--- a/cancel.c
+++ b/cancel.c
@@ -47,3 +47,41 @@ pthread_setcanceltype(int type, int *oldtype)
   this->canceltype = type;
   return 0;
 }
+
+int
+pthread_cancel(pthread_t thread)
+{
+  _pthread_threads_thread_t * this;
+
+  this = _PTHREAD_THIS;
+
+  if (this == NULL)
+    {
+      return ESRCH;
+    }
+
+  this->cancelthread = _PTHREAD_YES;
+
+  return 0;
+}
+
+void
+pthread_testcancel(void)
+{
+  _pthread_threads_thread_t * this;
+
+  this = _PTHREAD_THIS;
+
+  if (this == NULL ||
+      this->attr.cancelstate == PTHREAD_CANCEL_DISABLE)
+    {
+      return;
+    }
+
+  if (this->cancelthread == _PTHREAD_YES)
+    {
+      pthread_exit(PTHREAD_CANCELED);
+
+      /* Never reached. */
+    }
+}