diff options
Diffstat (limited to 'cpukit/posix/src/cond.c')
-rw-r--r-- | cpukit/posix/src/cond.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/cpukit/posix/src/cond.c b/cpukit/posix/src/cond.c deleted file mode 100644 index e20cfe5359..0000000000 --- a/cpukit/posix/src/cond.c +++ /dev/null @@ -1,400 +0,0 @@ -/* cond.c - * - * $Id$ - */ - -#include <pthread.h> -#include <errno.h> - -#include <rtems/score/object.h> -#include <rtems/score/states.h> -#include <rtems/score/watchdog.h> -#include <rtems/posix/cond.h> -#include <rtems/posix/time.h> - -/*PAGE - * - * The default condition variable attributes structure. - */ - -const pthread_condattr_t _POSIX_Condition_variables_Default_attributes = { - TRUE, /* is_initialized */ - PTHREAD_PROCESS_PRIVATE /* process_shared */ -}; - -/*PAGE - * - * _POSIX_Condition_variables_Manager_initialization - * - * This routine initializes all condition variable manager related data - * structures. - * - * Input parameters: - * maximum_condition_variables - maximum configured condition_variables - * - * Output parameters: NONE - */ - -void _POSIX_Condition_variables_Manager_initialization( - unsigned32 maximum_condition_variables -) -{ - _Objects_Initialize_information( - &_POSIX_Condition_variables_Information, - OBJECTS_POSIX_CONDITION_VARIABLES, - TRUE, - maximum_condition_variables, - sizeof( POSIX_Condition_variables_Control ), - FALSE, - 0, - FALSE - ); -} - -/*PAGE - * - * 11.4.1 Condition Variable Initialization Attributes, - * P1003.1c/Draft 10, p. 96 - */ - -int pthread_condattr_init( - pthread_condattr_t *attr -) -{ - if ( !attr ) - return EINVAL; - - *attr = _POSIX_Condition_variables_Default_attributes; - return 0; -} - -/*PAGE - * - * 11.4.1 Condition Variable Initialization Attributes, - * P1003.1c/Draft 10, p. 96 - */ - -int pthread_condattr_destroy( - pthread_condattr_t *attr -) -{ - if ( !attr || attr->is_initialized == FALSE ) - return EINVAL; - - attr->is_initialized = FALSE; - return 0; -} - -/*PAGE - * - * 11.4.1 Condition Variable Initialization Attributes, - * P1003.1c/Draft 10, p. 96 - */ - -int pthread_condattr_getpshared( - const pthread_condattr_t *attr, - int *pshared -) -{ - if ( !attr ) - return EINVAL; - - *pshared = attr->process_shared; - return 0; -} - -/*PAGE - * - * 11.4.1 Condition Variable Initialization Attributes, - * P1003.1c/Draft 10, p. 96 - */ - -int pthread_condattr_setpshared( - pthread_condattr_t *attr, - int pshared -) -{ - if ( !attr ) - return EINVAL; - - attr->process_shared = pshared; - return 0; -} - -/*PAGE - * - * 11.4.2 Initializing and Destroying a Condition Variable, - * P1003.1c/Draft 10, p. 87 - */ - -int pthread_cond_init( - pthread_cond_t *cond, - const pthread_condattr_t *attr -) -{ - POSIX_Condition_variables_Control *the_cond; - const pthread_condattr_t *the_attr; - - if ( attr ) the_attr = attr; - else the_attr = &_POSIX_Condition_variables_Default_attributes; - - /* - * XXX: Be careful about attributes when global!!! - */ - - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) - return POSIX_MP_NOT_IMPLEMENTED(); - - if ( !the_attr->is_initialized ) - return EINVAL; - - _Thread_Disable_dispatch(); - - the_cond = _POSIX_Condition_variables_Allocate(); - - if ( !the_cond ) { - _Thread_Enable_dispatch(); - return ENOMEM; - } - - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED && - !( _Objects_MP_Allocate_and_open( &_POSIX_Condition_variables_Information, - 0, the_cond->Object.id, FALSE ) ) ) { - _POSIX_Condition_variables_Free( the_cond ); - _Thread_Enable_dispatch(); - return EAGAIN; - } - - the_cond->process_shared = the_attr->process_shared; - - the_cond->Mutex = 0; - -/* XXX some more initialization might need to go here */ - _Thread_queue_Initialize( - &the_cond->Wait_queue, - OBJECTS_POSIX_CONDITION_VARIABLES, - THREAD_QUEUE_DISCIPLINE_FIFO, - STATES_WAITING_FOR_CONDITION_VARIABLE, - _POSIX_Condition_variables_MP_Send_extract_proxy, - ETIMEDOUT - ); - - _Objects_Open( - &_POSIX_Condition_variables_Information, - &the_cond->Object, - 0 - ); - - *cond = the_cond->Object.id; - - if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) - _POSIX_Condition_variables_MP_Send_process_packet( - POSIX_CONDITION_VARIABLES_MP_ANNOUNCE_CREATE, - the_cond->Object.id, - 0, /* Name not used */ - 0 /* Not used */ - ); - - _Thread_Enable_dispatch(); - - return 0; -} - -/*PAGE - * - * 11.4.2 Initializing and Destroying a Condition Variable, - * P1003.1c/Draft 10, p. 87 - */ - -int pthread_cond_destroy( - pthread_cond_t *cond -) -{ - register POSIX_Condition_variables_Control *the_cond; - Objects_Locations location; - - the_cond = _POSIX_Condition_variables_Get( cond, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return EINVAL; - case OBJECTS_REMOTE: - _Thread_Dispatch(); - return POSIX_MP_NOT_IMPLEMENTED(); - return EINVAL; - case OBJECTS_LOCAL: - - _Objects_Close( - &_POSIX_Condition_variables_Information, - &the_cond->Object - ); - - if ( _Thread_queue_Get_number_waiting( &the_cond->Wait_queue ) ) - return EBUSY; - - _POSIX_Condition_variables_Free( the_cond ); - - if ( the_cond->process_shared == PTHREAD_PROCESS_SHARED ) { - - _Objects_MP_Close( - &_POSIX_Condition_variables_Information, - the_cond->Object.id - ); - - _POSIX_Condition_variables_MP_Send_process_packet( - POSIX_CONDITION_VARIABLES_MP_ANNOUNCE_DELETE, - the_cond->Object.id, - 0, /* Not used */ - 0 /* Not used */ - ); - } - _Thread_Enable_dispatch(); - return 0; - } - return POSIX_BOTTOM_REACHED(); -} - -/*PAGE - * - * _POSIX_Condition_variables_Signal_support - * - * A support routine which implements guts of the broadcast and single task - * wake up version of the "signal" operation. - */ - -int _POSIX_Condition_variables_Signal_support( - pthread_cond_t *cond, - boolean is_broadcast -) -{ - register POSIX_Condition_variables_Control *the_cond; - Objects_Locations location; - Thread_Control *the_thread; - - the_cond = _POSIX_Condition_variables_Get( cond, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return EINVAL; - case OBJECTS_REMOTE: - _Thread_Dispatch(); - return POSIX_MP_NOT_IMPLEMENTED(); - return EINVAL; - case OBJECTS_LOCAL: - - do { - the_thread = _Thread_queue_Dequeue( &the_cond->Wait_queue ); - } while ( is_broadcast && the_thread ); - return 0; - } - return POSIX_BOTTOM_REACHED(); -} - -/*PAGE - * - * 11.4.3 Broadcasting and Signaling a Condition, P1003.1c/Draft 10, p. 101 - */ - -int pthread_cond_signal( - pthread_cond_t *cond -) -{ - return _POSIX_Condition_variables_Signal_support( cond, FALSE ); -} - -/*PAGE - * - * 11.4.3 Broadcasting and Signaling a Condition, P1003.1c/Draft 10, p. 101 - */ - -int pthread_cond_broadcast( - pthread_cond_t *cond -) -{ - return _POSIX_Condition_variables_Signal_support( cond, TRUE ); -} - -/*PAGE - * - * _POSIX_Condition_variables_Wait_support - * - * A support routine which implements guts of the blocking, non-blocking, and - * timed wait version of condition variable wait routines. - */ - -int _POSIX_Condition_variables_Wait_support( - pthread_cond_t *cond, - pthread_mutex_t *mutex, - Watchdog_Interval timeout -) -{ - register POSIX_Condition_variables_Control *the_cond; - Objects_Locations location; - int status; - - the_cond = _POSIX_Condition_variables_Get( cond, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return EINVAL; - case OBJECTS_REMOTE: - _Thread_Dispatch(); - return POSIX_MP_NOT_IMPLEMENTED(); - return EINVAL; - case OBJECTS_LOCAL: - - /* - * XXX: should be an error if cond->Mutex != mutex - */ - - status = pthread_mutex_unlock( mutex ); - if ( !status ) - return status; - - the_cond->Mutex = *mutex; - -/* XXX .. enter critical section .. */ - _Thread_queue_Enqueue( &the_cond->Wait_queue, 0 ); - - _Thread_Enable_dispatch(); - - status = pthread_mutex_lock( mutex ); - if ( !status ) - return status; - - return _Thread_Executing->Wait.return_code; - } - return POSIX_BOTTOM_REACHED(); -} - -/*PAGE - * - * 11.4.4 Waiting on a Condition, P1003.1c/Draft 10, p. 105 - */ - -int pthread_cond_wait( - pthread_cond_t *cond, - pthread_mutex_t *mutex -) -{ - return _POSIX_Condition_variables_Wait_support( - cond, - mutex, - THREAD_QUEUE_WAIT_FOREVER - ); -} - -/*PAGE - * - * 11.4.4 Waiting on a Condition, P1003.1c/Draft 10, p. 105 - */ - -int pthread_cond_timedwait( - pthread_cond_t *cond, - pthread_mutex_t *mutex, - const struct timespec *abstime -) -{ - return _POSIX_Condition_variables_Wait_support( - cond, - mutex, - _POSIX_Time_Spec_to_interval( abstime ) - ); -} |