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-rw-r--r--cpukit/score/src/coremutex.c269
1 files changed, 0 insertions, 269 deletions
diff --git a/cpukit/score/src/coremutex.c b/cpukit/score/src/coremutex.c
deleted file mode 100644
index 08d1630b7f..0000000000
--- a/cpukit/score/src/coremutex.c
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@@ -1,269 +0,0 @@
-/*
- * Mutex Handler
- *
- * DESCRIPTION:
- *
- * This package is the implementation of the Mutex Handler.
- * This handler provides synchronization and mutual exclusion capabilities.
- *
- * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
- * On-Line Applications Research Corporation (OAR).
- * All rights assigned to U.S. Government, 1994.
- *
- * This material may be reproduced by or for the U.S. Government pursuant
- * to the copyright license under the clause at DFARS 252.227-7013. This
- * notice must appear in all copies of this file and its derivatives.
- *
- * $Id$
- */
-
-#include <rtems/system.h>
-#include <rtems/score/isr.h>
-#include <rtems/score/coremutex.h>
-#include <rtems/score/states.h>
-#include <rtems/score/thread.h>
-#include <rtems/score/threadq.h>
-
-/*PAGE
- *
- * _CORE_mutex_Initialize
- *
- * This routine initializes a mutex at create time and set the control
- * structure according to the values passed.
- *
- * Input parameters:
- * the_mutex - the mutex control block to initialize
- * the_class - the API class of the object
- * the_mutex_attributes - the mutex attributes specified at create time
- * initial_lock - mutex initial lock or unlocked status
- * proxy_extract_callout - MP specific extract callout
- *
- * Output parameters: NONE
- */
-
-void _CORE_mutex_Initialize(
- CORE_mutex_Control *the_mutex,
- Objects_Classes the_class,
- CORE_mutex_Attributes *the_mutex_attributes,
- unsigned32 initial_lock,
- Thread_queue_Extract_callout proxy_extract_callout
-)
-{
-
-/* Add this to the RTEMS environment later ?????????
- rtems_assert( initial_lock == CORE_MUTEX_LOCKED ||
- initial_lock == CORE_MUTEX_UNLOCKED );
- */
-
- the_mutex->Attributes = *the_mutex_attributes;
- the_mutex->lock = initial_lock;
-
- if ( initial_lock == CORE_MUTEX_LOCKED ) {
- the_mutex->nest_count = 1;
- the_mutex->holder = _Thread_Executing;
- the_mutex->holder_id = _Thread_Executing->Object.id;
- _Thread_Executing->resource_count++;
- } else {
- the_mutex->nest_count = 0;
- the_mutex->holder = NULL;
- the_mutex->holder_id = 0;
- }
-
- _Thread_queue_Initialize(
- &the_mutex->Wait_queue,
- the_class,
- _CORE_mutex_Is_priority( the_mutex_attributes ) ?
- THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
- STATES_WAITING_FOR_MUTEX,
- proxy_extract_callout,
- CORE_MUTEX_TIMEOUT
- );
-}
-
-/*PAGE
- *
- * _CORE_mutex_Seize
- *
- * This routine attempts to allocate a mutex to the calling thread.
- *
- * 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(
- CORE_mutex_Control *the_mutex,
- Objects_Id id,
- boolean wait,
- Watchdog_Interval timeout
-)
-{
- Thread_Control *executing;
- ISR_Level level;
-
- executing = _Thread_Executing;
- 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 );
- return;
- }
-
- if ( !wait ) {
- _ISR_Enable( level );
- executing->Wait.return_code = CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT;
- return;
- }
-
- if ( _Objects_Are_ids_equal(
- _Thread_Executing->Object.id, the_mutex->holder_id ) ) {
- if ( _CORE_mutex_Is_nesting_allowed( &the_mutex->Attributes ) )
- the_mutex->nest_count++;
- else
- executing->Wait.return_code = CORE_MUTEX_STATUS_NESTING_NOT_ALLOWED;
-
- _ISR_Enable( level );
- return;
- }
-
- _Thread_queue_Enter_critical_section( &the_mutex->Wait_queue );
- executing->Wait.queue = &the_mutex->Wait_queue;
- executing->Wait.id = id;
- _ISR_Enable( level );
-
- if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) &&
- the_mutex->holder->current_priority >
- _Thread_Executing->current_priority ) {
- _Thread_Change_priority(
- the_mutex->holder, _Thread_Executing->current_priority );
- }
-
- _Thread_queue_Enqueue( &the_mutex->Wait_queue, timeout );
-}
-
-/*
- * _CORE_mutex_Surrender
- *
- * DESCRIPTION:
- *
- * This routine frees a unit to the mutex. If a task was blocked waiting for
- * a unit from this mutex, then that task will be readied and the unit
- * given to that task. Otherwise, the unit will be returned to the mutex.
- *
- * Input parameters:
- * the_mutex - the mutex to be flushed
- * id - id of parent mutex
- * api_mutex_mp_support - api dependent MP support actions
- *
- * Output parameters:
- * CORE_MUTEX_STATUS_SUCCESSFUL - if successful
- * core error code - if unsuccessful
- */
-
-CORE_mutex_Status _CORE_mutex_Surrender(
- CORE_mutex_Control *the_mutex,
- Objects_Id id,
- CORE_mutex_API_mp_support_callout api_mutex_mp_support
-)
-{
- Thread_Control *the_thread;
-
- if ( !_Objects_Are_ids_equal(
- _Thread_Executing->Object.id, the_mutex->holder_id ) )
- return( CORE_MUTEX_STATUS_NOT_OWNER_OF_RESOURCE );
-
- the_mutex->nest_count--;
-
- if ( the_mutex->nest_count != 0 )
- return( CORE_MUTEX_STATUS_SUCCESSFUL );
-
- _Thread_Executing->resource_count--;
- the_mutex->holder = NULL;
- the_mutex->holder_id = 0;
-
- /*
- * Whether or not someone is waiting for the mutex, an
- * inherited priority must be lowered if this is the last
- * mutex (i.e. resource) this task has.
- */
-
- if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) &&
- _Thread_Executing->resource_count == 0 &&
- _Thread_Executing->real_priority !=
- _Thread_Executing->current_priority ) {
- _Thread_Change_priority(
- _Thread_Executing,
- _Thread_Executing->real_priority
- );
- }
-
- if ( ( the_thread = _Thread_queue_Dequeue( &the_mutex->Wait_queue ) ) ) {
-
- if ( !_Objects_Is_local_id( the_thread->Object.id ) ) {
-
- the_mutex->holder = NULL;
- the_mutex->holder_id = the_thread->Object.id;
- the_mutex->nest_count = 1;
-
- ( *api_mutex_mp_support)( the_thread, id );
-
- } else {
-
- the_mutex->holder = the_thread;
- the_mutex->holder_id = the_thread->Object.id;
- the_thread->resource_count++;
- the_mutex->nest_count = 1;
-
- /*
- * No special action for priority inheritance because the_thread
- * is guaranteed to be the highest priority thread waiting for
- * the mutex.
- */
- }
- } else
- the_mutex->lock = CORE_MUTEX_UNLOCKED;
-
- return( CORE_MUTEX_STATUS_SUCCESSFUL );
-}
-
-/*PAGE
- *
- * _CORE_mutex_Flush
- *
- * This function a flushes the mutex's task wait queue.
- *
- * Input parameters:
- * the_mutex - the mutex to be flushed
- * remote_extract_callout - function to invoke remotely
- * status - status to pass to thread
- *
- * Output parameters: NONE
- */
-
-void _CORE_mutex_Flush(
- CORE_mutex_Control *the_mutex,
- Thread_queue_Flush_callout remote_extract_callout,
- unsigned32 status
-)
-{
-
- _Thread_queue_Flush(
- &the_mutex->Wait_queue,
- remote_extract_callout,
- status
- );
-
-}
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