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/src/resource_snapshot.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'cpukit/libcsupport/src/resource_snapshot.c') diff --git a/cpukit/libcsupport/src/resource_snapshot.c b/cpukit/libcsupport/src/resource_snapshot.c index 23177c4c37..d0dda9f7ca 100644 --- a/cpukit/libcsupport/src/resource_snapshot.c +++ b/cpukit/libcsupport/src/resource_snapshot.c @@ -49,7 +49,6 @@ #include #include #include - #include #include #endif @@ -76,7 +75,6 @@ static const struct { { OBJECTS_POSIX_API, OBJECTS_POSIX_MUTEXES }, { OBJECTS_POSIX_API, OBJECTS_POSIX_RWLOCKS }, { OBJECTS_POSIX_API, OBJECTS_POSIX_SEMAPHORES }, - { OBJECTS_POSIX_API, OBJECTS_POSIX_SPINLOCKS }, { OBJECTS_POSIX_API, OBJECTS_POSIX_THREADS }, { OBJECTS_POSIX_API, OBJECTS_POSIX_TIMERS } #endif -- cgit v1.2.3