/*****************************************************************************/
/*
                                 Vm.h
*/
/*****************************************************************************/

#ifndef VM_H_LOADED
#define VM_H_LOADED 1

#include "wasd.h"

/**********/
/* macros */
/**********/

#define VM_MAGIC1  0xDEADC0DE   /* general */
#define VM_MAGIC2  0xBADDCAFE   /* request */
#define VM_MAGIC3  0xB16B00B5   /* HTTP/2 */
#define VM_H2MAGIC 0xDDEFACED   /* HTTP/2 header space */

/**************/
/* structures */
/**************/

#pragma member_alignment __save
#pragma nomember_alignment

typedef struct VmStruct VM_STRUCT;

/* 24 bytes overhead in total */
struct VmStruct
{
   ulong  size,
          magic;

   /* fill to quadword */
   uchar  fill [7];

   /* inbuilt HTTP/2 header fields (also see HTTP2.H) */
   union vm_header2
   {
      uchar h2header [9];
      struct
      { 
         uchar  h2length [3];
         uchar  h2type   [1];
         uchar  h2flags  [1];
         uchar  h2ident  [4];
      };
      struct
      { 
         /* filler to header size */
         uchar  h2fill [5];
         ulong  h2magic;
      };
   };
   uchar  h2payload [];
};

#pragma member_alignment __restore

/***********************/
/* function prototypes */
/***********************/

/* general memory */

VmGeneralInit ();
uchar* VmGet (ulong);
VmFree (uchar*, char*, int);
uchar* VmRealloc (uchar*, ulong, char*, int);

/* HTTP/2 memory */

VmHttp2Init ();
VmHttp2Tune ();
HTTP2_STRUCT* VmHttp2Get ();
VmHttp2Free (HTTP2_STRUCT*, char*, int);

VmFree2Heap (HTTP2_STRUCT*, char*, int);
VmFreeFrom2Heap (HTTP2_STRUCT*, uchar*, char*, int);
uchar* VmRealloc2Heap (HTTP2_STRUCT*, uchar*, ulong, char*, int);

/* request memory */

VmRequestInit ();
VmRequestTune ();
REQUEST_STRUCT* VmGetRequest ();
VmFreeRequest (REQUEST_STRUCT*, char*, int);

uchar* VmGetHeap (REQUEST_STRUCT*, ulong);
VmFreeHeap (REQUEST_STRUCT*, char*, int);
VmFreeFromHeap (REQUEST_STRUCT*, uchar*, char*, int);
uchar* VmReallocHeap (REQUEST_STRUCT*, uchar*, ulong, char*, int);

/* cache memory */

VmCacheInit (int);
uchar* VmGetCache (ulong);
VmFreeCache (uchar*, char*, int);

VmPermCacheInit (int);
uchar* VmGetPermCache (ulong);
VmFreePermCache (uchar*, char*, int);

/* memory report */

VmReport (REQUEST_STRUCT*, REQUEST_AST);
VmWrite (struct dsc$descriptor*, REQUEST_STRUCT*);

#endif /* VM_H_LOADED */

/*****************************************************************************/