From c42be504c92d76d2e06d0fc8ebd05fc913376d2d Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Wed, 16 Nov 2016 14:50:09 +0100 Subject: 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 . 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. --- cpukit/libcsupport/include/rtems/libcsupport.h | 1 - 1 file changed, 1 deletion(-) (limited to 'cpukit/libcsupport/include/rtems') diff --git a/cpukit/libcsupport/include/rtems/libcsupport.h b/cpukit/libcsupport/include/rtems/libcsupport.h index c0fab6be97..e51b250f13 100644 --- a/cpukit/libcsupport/include/rtems/libcsupport.h +++ b/cpukit/libcsupport/include/rtems/libcsupport.h @@ -117,7 +117,6 @@ typedef struct { uint32_t active_mutexes; uint32_t active_rwlocks; uint32_t active_semaphores; - uint32_t active_spinlocks; uint32_t active_threads; uint32_t active_timers; } rtems_resource_posix_api; -- cgit v1.2.3