posix: Add self-contained pthread spinlock

Turn pthread_spinlock_t into a self-contained object.  On uni-processor
configurations, interrupts are disabled in the lock/trylock operations
and the previous interrupt status is restored in the corresponding
unlock operations.  On SMP configurations, a ticket lock is a acquired
and released in addition.

The self-contained pthread_spinlock_t object is defined by Newlib in
<sys/_pthreadtypes.h>.

typedef struct {
  struct _Ticket_lock_Control _lock;
  __uint32_t                  _interrupt_state;
} pthread_spinlock_t;

This implementation is simple and efficient.  However, this test case of
the Linux Test Project would fail due to call of printf() and sleep()
during spin lock ownership:

https://github.com/linux-test-project/ltp/blob/master/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c

There is only limited support for profiling on SMP configurations.

Delete CORE spinlock implementation.

Update #2674.

1 files changed, 16 insertions, 30 deletions

diff --git a/testsuites/psxtests/psxspin01/psxspin01.scn b/testsuites/psxtests/psxspin01/psxspin01.scn
index 5c0e752969..dae970f1a0 100644
--- a/testsuites/psxtests/psxspin01/psxspin01.scn
+++ b/testsuites/psxtests/psxspin01/psxspin01.scn
@@ -1,32 +1,18 @@
 *** BEGIN OF TEST PSXSPIN 1 ***
-pthread_spin_init( NULL, PTHREAD_PROCESS_PRIVATE ) -- EINVAL
-pthread_spin_init( NULL, PTHREAD_PROCESS_SHARED ) -- EINVAL
-pthread_spin_init( &spinlock, 0x1234 ) -- EINVAL
-pthread_spin_init( &spinlock, PTHREAD_PROCESS_SHARED ) -- EINVAL
-pthread_spin_init( &Spinlock, PTHREAD_PROCESS_PRIVATE ) -- OK
-pthread_spin_init( &spinlock, PTHREAD_PROCESS_PRIVATE ) -- EAGAIN
-pthread_spin_init( &spinlock, PTHREAD_PROCESS_PRIVATE ) -- EAGAIN
-pthread_spin_lock( NULL ) -- EINVAL
-pthread_spin_trylock( NULL ) -- EINVAL
-pthread_spin_unlock( NULL ) -- EINVAL
-pthread_spin_destroy( NULL ) -- EINVAL
-pthread_spin_lock( &spinlock ) -- EINVAL
-pthread_spin_trylock( &spinlock ) -- EINVAL
-pthread_spin_unlock( &spinlock ) -- EINVAL
-pthread_spin_destroy( &spinlock ) -- EINVAL
-pthread_spin_unlock( &Spinlock ) -- EPERM
-pthread_spin_lock( &Spinlock ) -- OK
-pthread_spin_lock( &Spinlock ) -- EDEADLK
-pthread_spin_trylock( &Spinlock ) -- EDEADLK
-pthread_spin_unlock( &Spinlock ) -- OK
-pthread_spin_trylock( &Spinlock ) -- OK
-pthread_spin_unlock( &Spinlock ) -- OK
-pthread_spin_lock( &Spinlock ) from Thread -- OK
-sleep to allow main thread to run
-pthread_spin_unlock( &Spinlock ) -- EPERM
-pthread_spin_lock( &Spinlock ) -- OK
-pthread_spin_unlock( &Spinlock ) from Thread -- OK
-pthread_spin_destroy( &Spinlock ) -- EBUSY
-pthread_spin_unlock( &Spinlock ) -- OK
-pthread_spin_destroy( &Spinlock ) -- OK
+pthread_spin_init( &spinlock, PTHREAD_PROCESS_PRIVATE ) -- OK
+pthread_spin_destroy( &spinlock ) -- OK
+pthread_spin_init( &spinlock, PTHREAD_PROCESS_SHARED ) -- OK
+pthread_spin_destroy( &spinlock ) -- OK
+pthread_spin_init( &spinlock, 0x1234 ) -- OK
+pthread_spin_init( &spinlock2, 0 ) -- OK
+pthread_spin_lock( &spinlock ) -- OK
+pthread_spin_lock( &spinlock2 ) -- OK
+pthread_spin_unlock( &spinlock2 ) -- OK
+pthread_spin_unlock( &spinlock ) -- OK
+pthread_spin_trylock( &spinlock ) -- OK
+pthread_spin_trylock( &spinlock2 ) -- OK
+pthread_spin_unlock( &spinlock2 ) -- OK
+pthread_spin_unlock( &spinlock ) -- OK
+pthread_spin_destroy( &spinlock2 ) -- OK
+pthread_spin_destroy( &spinlock ) -- OK
 *** END OF TEST PSXSPIN 1 ***