doxygen/4.11.1/coresem_8h_source.html

 /*
  *  COPYRIGHT (c) 1989-2008.
  *  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.rtems.org/license/LICENSE.
  */

 #ifndef _RTEMS_SCORE_CORESEM_H
 #define _RTEMS_SCORE_CORESEM_H

 #include <rtems/score/threadq.h>

 #ifdef __cplusplus
 extern "C" {
 #endif

 typedef enum {
   CORE_SEMAPHORE_DISCIPLINES_FIFO,
   CORE_SEMAPHORE_DISCIPLINES_PRIORITY
 }   CORE_semaphore_Disciplines;

 typedef struct {
   uint32_t                    maximum_count;
   CORE_semaphore_Disciplines  discipline;
 }   CORE_semaphore_Attributes;

 typedef struct {
   Thread_queue_Control        Wait_queue;
   CORE_semaphore_Attributes   Attributes;
   uint32_t                    count;
 }   CORE_semaphore_Control;

 #ifdef __cplusplus
 }
 #endif

 #endif
 /*  end of include file */
CORE_SEMAPHORE_DISCIPLINES_FIFO
This specifies that threads will wait for the semaphore in FIFO order.
Definition: coresem.h:45

CORE_semaphore_Attributes::discipline
CORE_semaphore_Disciplines discipline
This field indicates whether threads waiting on the semaphore block in FIFO or priority order...
Definition: coresem.h:62

CORE_semaphore_Control
The following defines the control block used to manage each counting semaphore.
Definition: coresem.h:69

CORE_semaphore_Disciplines
CORE_semaphore_Disciplines
Blocking disciplines for a semaphore.
Definition: coresem.h:43

Thread_queue_Control
This is the structure used to manage sets of tasks which are blocked waiting to acquire a resource...
Definition: threadq.h:171

threadq.h
Constants and Structures Needed to Declare a Thread Queue.

CORE_semaphore_Attributes
The following defines the control block used to manage the attributes of each semaphore.
Definition: coresem.h:56

CORE_SEMAPHORE_DISCIPLINES_PRIORITY
This specifies that threads will wait for the semaphore in priority order.
Definition: coresem.h:49

CORE_semaphore_Control::Attributes
CORE_semaphore_Attributes Attributes
This element is the set of attributes which define this instance&#39;s behavior.
Definition: coresem.h:77

CORE_semaphore_Control::Wait_queue
Thread_queue_Control Wait_queue
This field is the Waiting Queue used to manage the set of tasks which are blocked waiting to obtain t...
Definition: coresem.h:73

CORE_semaphore_Control::count
uint32_t count
This element contains the current count of this semaphore.
Definition: coresem.h:79

CORE_semaphore_Attributes::maximum_count
uint32_t maximum_count
This element indicates the maximum count this semaphore may have.
Definition: coresem.h:58