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score: Add and use ISR locks

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ISR locks are low-level locks to protect critical sections accessed by
threads and interrupt service routines.

On single processor configurations the ISR locks degrade to simple ISR
disable/enable sequences.  No additional storage or objects are
required.

This synchronization primitive is supported on SMP configurations.  Here
SMP locks are used.
This commit is contained in:
Sebastian Huber
2013-07-31 12:59:35 +02:00
parent f20275db90
commit 2d915cf389
5 changed files with 195 additions and 48 deletions
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18
testsuites/sptests/sp37/init.c
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@@ -44,6 +44,23 @@ rtems_timer_service_routine test_isr_in_progress(
/* test bodies */
static void test_isr_locks( void )
{
ISR_Level normal_interrupt_level = _ISR_Get_level();
ISR_lock_Control initialized = ISR_LOCK_INITIALIZER;
ISR_lock_Control lock;
ISR_Level level;
_ISR_lock_Initialize( &lock );
rtems_test_assert( memcmp( &lock, &initialized, sizeof( lock ) ) == 0 );
_ISR_lock_Acquire( &lock, level );
rtems_test_assert( normal_interrupt_level != _ISR_Get_level() );
_ISR_lock_Release( &lock, level );
rtems_test_assert( normal_interrupt_level == _ISR_Get_level() );
}
static rtems_mode get_interrupt_level( void )
{
rtems_status_code sc;
@@ -228,6 +245,7 @@ rtems_task Init(
puts( "\n\n*** TEST 37 ***" );
test_isr_locks();
test_interrupt_locks();
build_time( &time, 12, 31, 1988, 9, 0, 0, 0 );