add stub versions of some missing optional pthread interfaces

priority inheritance is not yet supported, and priority protection
probably will not be supported ever unless there's serious demand for
it (it's a fairly heavy-weight feature).

per-thread cpu clocks would be nice to have, but to my knowledge linux
is still not capable of supporting them. glibc fakes them by using the
_process_ cpu-time clock and subtracting the thread creation time,
which gives seriously incorrect semantics (worse than not supporting
the feature at all), so until there's a way to do it right, it will
remain as a stub that always fails.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/thread/pthread_mutexattr_setprotocol.c b/src/thread/pthread_mutexattr_setprotocol.c
new file mode 100644
index 00000000..c92a31c8
--- /dev/null
+++ b/src/thread/pthread_mutexattr_setprotocol.c
@@ -0,0 +1,7 @@
+#include "pthread_impl.h"
+
+int pthread_mutexattr_setprotocol(pthread_mutexattr_t *a, int protocol)
+{
+	if (protocol) return ENOTSUP;
+	return 0;
+}