dm_defs.h

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/*************************************************************************/
/*                                                                       */
/*               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       */
/*                                                                       */
/*      dm_defs.h                                      Nucleus PLUS 1.15 */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      DM - Dynamic Memory Management                                   */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains data structure definitions and constants for  */
/*      the Dynamic Memory component.                                    */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      DM_PCB                              Dynamic Pool control block   */
/*      DM_HEADER                           Header of each memory block  */
/*      DM_SUSPEND                          Memory 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 DM_DEFS
#define DM_DEFS


/* Adjust a size to something that is evenly divisible by the number of bytes
   in an UNSIGNED data type.  */

#define DM_ADJUSTED_SIZE(size) \
  ((((size) + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * sizeof(UNSIGNED))

#define DM_ADJUSTED_ALIGNMENT(alignment) DM_ADJUSTED_SIZE(alignment)

/* Define constants local to this component.  */

#define         DM_DYNAMIC_ID          0x44594e41UL
#define         DM_OVERHEAD            ((sizeof(DM_HEADER) + sizeof(UNSIGNED) \
                                        - 1)/sizeof(UNSIGNED)) *    \
                                        sizeof(UNSIGNED)


/* Define the Dynamic Pool Control Block data type.  */

typedef struct DM_PCB_STRUCT 
{
    CS_NODE             dm_created;            /* Node for linking to    */
                                               /* created dynamic pools  */
    TC_PROTECT          dm_protect;            /* Protection structure   */
    UNSIGNED            dm_id;                 /* Internal PCB ID        */
    CHAR                dm_name[NU_MAX_NAME];  /* Dynamic Pool name      */
    VOID               *dm_start_address;      /* Starting pool address  */
    UNSIGNED            dm_pool_size;          /* Size of pool           */
    UNSIGNED            dm_min_allocation;     /* Minimum allocate size  */
    UNSIGNED            dm_available;          /* Total available bytes  */
    struct DM_HEADER_STRUCT    
                       *dm_memory_list;        /* Memory list            */
    struct DM_HEADER_STRUCT
                       *dm_search_ptr;         /* Search pointer         */
    BOOLEAN             dm_fifo_suspend;       /* Suspension type flag   */
#if     PAD_1
    DATA_ELEMENT        dm_padding[PAD_1];
#endif 
    UNSIGNED            dm_tasks_waiting;      /* Number of waiting tasks*/
    struct DM_SUSPEND_STRUCT
                       *dm_suspension_list;    /* Suspension list        */
} DM_PCB;    


/* Define the header structure that is in front of each memory block.  */

typedef struct DM_HEADER_STRUCT
{
    struct DM_HEADER_STRUCT
                       *dm_next_memory,        /* Next memory block      */
                       *dm_previous_memory;    /* Previous memory block  */
    BOOLEAN             dm_memory_free;        /* Memory block free flag */
#if     PAD_1
    DATA_ELEMENT        dm_padding[PAD_1];
#endif 
    DM_PCB             *dm_memory_pool;        /* Dynamic pool pointer   */
} DM_HEADER;


/* Define the dynamic memory suspension structure.  This structure is 
   allocated off of the caller's stack.  */
   
typedef struct DM_SUSPEND_STRUCT
{
    CS_NODE             dm_suspend_link;       /* Link to suspend blocks */
    DM_PCB             *dm_memory_pool;        /* Pointer to pool        */
    UNSIGNED            dm_request_size;       /* Size of memory request */
    TC_TCB             *dm_suspended_task;     /* Task suspended         */
    VOID               *dm_return_pointer;     /* Return memory address  */
    STATUS              dm_return_status;      /* Return status          */
} DM_SUSPEND;

#endif