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.
See also: https://devel.rtems.org/ticket/2674 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 Signed-off-by: Sebastian Huber <sebastian.hu...@embedded-brains.de> --- newlib/libc/sys/rtems/include/sys/_pthreadtypes.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/newlib/libc/sys/rtems/include/sys/_pthreadtypes.h b/newlib/libc/sys/rtems/include/sys/_pthreadtypes.h index e1a88e9..0f46463 100644 --- a/newlib/libc/sys/rtems/include/sys/_pthreadtypes.h +++ b/newlib/libc/sys/rtems/include/sys/_pthreadtypes.h @@ -22,6 +22,7 @@ #include <sys/sched.h> #include <sys/cpuset.h> +#include <sys/lock.h> /* * 2.5 Primitive System Data Types, P1003.1c/D10, p. 19. @@ -190,7 +191,10 @@ typedef struct { /* POSIX Spin Lock Types */ #if defined(_POSIX_SPIN_LOCKS) -typedef __uint32_t pthread_spinlock_t; /* POSIX Spin Lock Object */ +typedef struct { + struct _Ticket_lock_Control _lock; + __uint32_t _interrupt_state; +} pthread_spinlock_t; /* POSIX Spin Lock Object */ #endif /* defined(_POSIX_SPIN_LOCKS) */ /* POSIX Reader/Writer Lock Types */ -- 1.8.4.5 _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
