diff options
Diffstat (limited to 'c/src/exec/score/src/coremutexseize.c')
-rw-r--r-- | c/src/exec/score/src/coremutexseize.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/c/src/exec/score/src/coremutexseize.c b/c/src/exec/score/src/coremutexseize.c deleted file mode 100644 index 2fb2fc27e9..0000000000 --- a/c/src/exec/score/src/coremutexseize.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Mutex Handler - * - * DESCRIPTION: - * - * This package is the implementation of the Mutex Handler. - * This handler provides synchronization and mutual exclusion capabilities. - * - * COPYRIGHT (c) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#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_Seize (interrupt blocking support) - * - * 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 - * timeout - number of ticks to wait (0 means forever) - */ - -void _CORE_mutex_Seize_interrupt_blocking( - CORE_mutex_Control *the_mutex, - Watchdog_Interval timeout -) -{ - Thread_Control *executing; - - executing = _Thread_Executing; - if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) ) { - if ( the_mutex->holder->current_priority > executing->current_priority ) { - _Thread_Change_priority( - the_mutex->holder, - executing->current_priority, - FALSE - ); - } - } - - the_mutex->blocked_count++; - _Thread_queue_Enqueue( &the_mutex->Wait_queue, timeout ); - - if ( _Thread_Executing->Wait.return_code == CORE_MUTEX_STATUS_SUCCESSFUL ) { - /* - * if CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT then nothing to do - * because this task is already the highest priority. - */ - - if ( _CORE_mutex_Is_priority_ceiling( &the_mutex->Attributes ) ) { - if (the_mutex->Attributes.priority_ceiling < executing->current_priority){ - _Thread_Change_priority( - executing, - the_mutex->Attributes.priority_ceiling, - FALSE - ); - } - } - } - _Thread_Enable_dispatch(); -} - -#if !defined(USE_INLINES) -int _CORE_mutex_Seize_interrupt_trylock( - CORE_mutex_Control *the_mutex, - ISR_Level *level_p -) -{ - Thread_Control *executing; - ISR_Level level = *level_p; - - /* disabled when you get here */ - - executing = _Thread_Executing; - executing->Wait.return_code = CORE_MUTEX_STATUS_SUCCESSFUL; - 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; - if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) || - _CORE_mutex_Is_priority_ceiling( &the_mutex->Attributes ) ) - executing->resource_count++; - - if ( !_CORE_mutex_Is_priority_ceiling( &the_mutex->Attributes ) ) { - _ISR_Enable( level ); - return 0; - } - /* else must be CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING */ - { - Priority_Control ceiling; - Priority_Control current; - - ceiling = the_mutex->Attributes.priority_ceiling; - current = executing->current_priority; - if ( current == ceiling ) { - _ISR_Enable( level ); - return 0; - } - if ( current > ceiling ) { - _Thread_Disable_dispatch(); - _ISR_Enable( level ); - _Thread_Change_priority( - the_mutex->holder, - the_mutex->Attributes.priority_ceiling, - FALSE - ); - _Thread_Enable_dispatch(); - return 0; - } - /* if ( current < ceiling ) */ { - executing->Wait.return_code = CORE_MUTEX_STATUS_CEILING_VIOLATED; - the_mutex->nest_count = 0; /* undo locking above */ - executing->resource_count--; /* undo locking above */ - _ISR_Enable( level ); - return 0; - } - } - return 0; - } - - 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 0; - case CORE_MUTEX_NESTING_IS_ERROR: - executing->Wait.return_code = CORE_MUTEX_STATUS_NESTING_NOT_ALLOWED; - _ISR_Enable( level ); - return 0; - case CORE_MUTEX_NESTING_BLOCKS: - break; - } - } - - return 1; -} -#endif |