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The code that attempts to obtain a mutex has now been inlined. The

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code remaining here now only blocks.
This commit is contained in:
Joel Sherrill
2000-07-06 19:10:30 +00:00
parent 3b4413c08f
commit 12aeaec6dc
2 changed files with 14 additions and 166 deletions
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90
c/src/exec/score/src/coremutexseize.c
View File

@@ -25,101 +25,24 @@
/*PAGE
*
* _CORE_mutex_Seize
* _CORE_mutex_Seize (interrupt blocking support)
*
* This routine attempts to allocate a mutex to the calling thread.
* This routine blocks the caller thread after an attempt attempts to obtain
* the specified mutex has failed.
*
* Input parameters:
* the_mutex - pointer to mutex control block
* id - id of object to wait on
* wait - TRUE if wait is allowed, FALSE otherwise
* timeout - number of ticks to wait (0 means forever)
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* available
* wait
*/
void _CORE_mutex_Seize(
void _CORE_mutex_Seize_interrupt_blocking(
CORE_mutex_Control *the_mutex,
Objects_Id id,
boolean wait,
Watchdog_Interval timeout
)
{
Thread_Control *executing;
ISR_Level level;
Thread_Control *executing;
executing = _Thread_Executing;
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
case CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT:
break;
case CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING:
if ( executing->current_priority <
the_mutex->Attributes.priority_ceiling) {
executing->Wait.return_code = CORE_MUTEX_STATUS_CEILING_VIOLATED;
return;
}
}
executing->Wait.return_code = CORE_MUTEX_STATUS_SUCCESSFUL;
_ISR_Disable( level );
if ( ! _CORE_mutex_Is_locked( the_mutex ) ) {
the_mutex->lock = CORE_MUTEX_LOCKED;
the_mutex->holder = executing;
the_mutex->holder_id = executing->Object.id;
the_mutex->nest_count = 1;
executing->resource_count++;
_ISR_Enable( level );
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
case CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT:
/* already the highest priority */
break;
case CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING:
if ( the_mutex->Attributes.priority_ceiling <
executing->current_priority ) {
_Thread_Change_priority(
the_mutex->holder,
the_mutex->Attributes.priority_ceiling,
FALSE
);
}
}
executing->Wait.return_code = CORE_MUTEX_STATUS_SUCCESSFUL;
return;
}
if ( _Thread_Is_executing( the_mutex->holder ) ) {
switch ( the_mutex->Attributes.lock_nesting_behavior ) {
case CORE_MUTEX_NESTING_ACQUIRES:
the_mutex->nest_count++;
_ISR_Enable( level );
return;
case CORE_MUTEX_NESTING_IS_ERROR:
executing->Wait.return_code = CORE_MUTEX_STATUS_NESTING_NOT_ALLOWED;
_ISR_Enable( level );
return;
case CORE_MUTEX_NESTING_BLOCKS:
break;
}
}
if ( !wait ) {
_ISR_Enable( level );
executing->Wait.return_code = CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT;
return;
}
_Thread_queue_Enter_critical_section( &the_mutex->Wait_queue );
executing->Wait.queue = &the_mutex->Wait_queue;
executing->Wait.id = id;
_ISR_Enable( level );
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
@@ -136,6 +59,7 @@ void _CORE_mutex_Seize(
break;
}
the_mutex->blocked_count++;
_Thread_queue_Enqueue( &the_mutex->Wait_queue, timeout );
if ( _Thread_Executing->Wait.return_code == CORE_MUTEX_STATUS_SUCCESSFUL ) {
@@ -156,5 +80,5 @@ void _CORE_mutex_Seize(
break;
}
}
_Thread_Enable_dispatch();
}

90
cpukit/score/src/coremutexseize.c
View File

@@ -25,101 +25,24 @@
/*PAGE
*
* _CORE_mutex_Seize
* _CORE_mutex_Seize (interrupt blocking support)
*
* This routine attempts to allocate a mutex to the calling thread.
* This routine blocks the caller thread after an attempt attempts to obtain
* the specified mutex has failed.
*
* Input parameters:
* the_mutex - pointer to mutex control block
* id - id of object to wait on
* wait - TRUE if wait is allowed, FALSE otherwise
* timeout - number of ticks to wait (0 means forever)
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* available
* wait
*/
void _CORE_mutex_Seize(
void _CORE_mutex_Seize_interrupt_blocking(
CORE_mutex_Control *the_mutex,
Objects_Id id,
boolean wait,
Watchdog_Interval timeout
)
{
Thread_Control *executing;
ISR_Level level;
Thread_Control *executing;
executing = _Thread_Executing;
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
case CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT:
break;
case CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING:
if ( executing->current_priority <
the_mutex->Attributes.priority_ceiling) {
executing->Wait.return_code = CORE_MUTEX_STATUS_CEILING_VIOLATED;
return;
}
}
executing->Wait.return_code = CORE_MUTEX_STATUS_SUCCESSFUL;
_ISR_Disable( level );
if ( ! _CORE_mutex_Is_locked( the_mutex ) ) {
the_mutex->lock = CORE_MUTEX_LOCKED;
the_mutex->holder = executing;
the_mutex->holder_id = executing->Object.id;
the_mutex->nest_count = 1;
executing->resource_count++;
_ISR_Enable( level );
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
case CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT:
/* already the highest priority */
break;
case CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING:
if ( the_mutex->Attributes.priority_ceiling <
executing->current_priority ) {
_Thread_Change_priority(
the_mutex->holder,
the_mutex->Attributes.priority_ceiling,
FALSE
);
}
}
executing->Wait.return_code = CORE_MUTEX_STATUS_SUCCESSFUL;
return;
}
if ( _Thread_Is_executing( the_mutex->holder ) ) {
switch ( the_mutex->Attributes.lock_nesting_behavior ) {
case CORE_MUTEX_NESTING_ACQUIRES:
the_mutex->nest_count++;
_ISR_Enable( level );
return;
case CORE_MUTEX_NESTING_IS_ERROR:
executing->Wait.return_code = CORE_MUTEX_STATUS_NESTING_NOT_ALLOWED;
_ISR_Enable( level );
return;
case CORE_MUTEX_NESTING_BLOCKS:
break;
}
}
if ( !wait ) {
_ISR_Enable( level );
executing->Wait.return_code = CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT;
return;
}
_Thread_queue_Enter_critical_section( &the_mutex->Wait_queue );
executing->Wait.queue = &the_mutex->Wait_queue;
executing->Wait.id = id;
_ISR_Enable( level );
switch ( the_mutex->Attributes.discipline ) {
case CORE_MUTEX_DISCIPLINES_FIFO:
case CORE_MUTEX_DISCIPLINES_PRIORITY:
@@ -136,6 +59,7 @@ void _CORE_mutex_Seize(
break;
}
the_mutex->blocked_count++;
_Thread_queue_Enqueue( &the_mutex->Wait_queue, timeout );
if ( _Thread_Executing->Wait.return_code == CORE_MUTEX_STATUS_SUCCESSFUL ) {
@@ -156,5 +80,5 @@ void _CORE_mutex_Seize(
break;
}
}
_Thread_Enable_dispatch();
}