www.pudn.com > os.rar > pi_defs.h
/*************************************************************************/
/* */
/* Copyright Mentor Graphics Corporation 2004 */
/* All Rights Reserved. */
/* */
/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */
/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */
/* SUBJECT TO LICENSE TERMS. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FILE NAME VERSION */
/* */
/* pi_defs.h Nucleus PLUS 1.15 */
/* */
/* COMPONENT */
/* */
/* PI - Pipe Management */
/* */
/* DESCRIPTION */
/* */
/* This file contains data structure definitions and constants for */
/* the message Pipe component. */
/* */
/* DATA STRUCTURES */
/* */
/* PI_PCB Pipe control block */
/* PI_SUSPEND Pipe suspension block */
/* */
/* DEPENDENCIES */
/* */
/* cs_defs.h Common service definitions */
/* tc_defs.h Thread Control definitions */
/* */
/*************************************************************************/
#include "plus/inc/cs_defs.h" /* Common service constants */
#include "plus/inc/tc_defs.h" /* Thread control constants */
/* Check to see if the file has been included already. */
#ifndef PI_DEFS
#define PI_DEFS
/* Define constants local to this component. */
#define PI_PIPE_ID 0x50495045UL
/* Define the Pipe Control Block data type. */
typedef struct PI_PCB_STRUCT
{
CS_NODE pi_created; /* Node for linking to */
/* created pipe list */
UNSIGNED pi_id; /* Internal PCB ID */
CHAR pi_name[NU_MAX_NAME]; /* Pipe name */
BOOLEAN pi_fixed_size; /* Fixed-size messages? */
BOOLEAN pi_fifo_suspend; /* Suspension type flag */
#if PAD_2
DATA_ELEMENT pi_padding[PAD_2];
#endif
UNSIGNED pi_pipe_size; /* Total size of pipe */
UNSIGNED pi_messages; /* Messages in pipe */
UNSIGNED pi_message_size; /* Size of each message */
UNSIGNED pi_available; /* Available bytes */
BYTE_PTR pi_start; /* Start of pipe area */
BYTE_PTR pi_end; /* End of pipe area + 1 */
BYTE_PTR pi_read; /* Read pointer */
BYTE_PTR pi_write; /* Write pointer */
UNSIGNED pi_tasks_waiting; /* Number of waiting tasks*/
struct PI_SUSPEND_STRUCT
*pi_urgent_list; /* Urgent message suspend */
struct PI_SUSPEND_STRUCT
*pi_suspension_list; /* Suspension list */
} PI_PCB;
/* Define the Pipe suspension structure. This structure is allocated off of
the caller's stack. */
typedef struct PI_SUSPEND_STRUCT
{
CS_NODE pi_suspend_link; /* Link to suspend blocks */
PI_PCB *pi_pipe; /* Pointer to the pipe */
TC_TCB *pi_suspended_task; /* Task suspended */
BYTE_PTR pi_message_area; /* Pointer to message area*/
UNSIGNED pi_message_size; /* Message size requested */
UNSIGNED pi_actual_size; /* Actual size of message */
STATUS pi_return_status; /* Return status */
} PI_SUSPEND;
#endif