/*PDSA_DEFS.H of 8-Mar-1994

16-May-1991. PAE. Initial version.
This is include file for structure definitions for portable
dynamic storage routines.
23-May-1991. PAE. Add codes for int/ext memory
12-Dec-1992. PAE. Need the extra stuff to get size_t definition.
 6-Jan-1993. PAE. Also need size_t in VOS[/vms only?] case
13-Aug-1993. PAE. Only define size_t if we have to. Allow for native_vms
 7-Sep-1993. PAE. Add in the function profiles
 8-sep-1993. PAE. Take care with 'standard' includes!
 8-Mar-1994. PAE. with ultra C - try something for OS9
*/

#include <stdio.h>
#ifdef __STDC__
#include <string.h>
#include <stdlib.h>
#ifndef _POSIX_SOURCE
#ifndef OS9
#include <unixlib.h>
#endif
#endif
#endif

#ifdef _POSIX_SOURCE
#include <sys/types.h>
#include <unistd.h>
#endif
#ifdef OSK /*defult in C2.3, not ultra c*/
typedef int size_t ;
#endif

/*define the header for the stuff in shared memory. 
After the header will come the bitmap, and then the data space*/
struct pdsa_header {
	int size ; /* size of memory available to user*/
	int quantum ; /*allocation unit*/
	int mode ; /*internal/external*/
	int item ; /* might contain address or rounding factor */
	int base ; /* relative if internal; pointer if external*/
	int freebits ; /*number of free bits*/
	int maplen ; /*sie of the bitmap*/
	} ;

/*define a structure to make it easy to access everything*/
/*this will be set up per process and so can contain pointers*/
struct pdsa_ptr {
	struct pdsa_header *header;
	char *bitmap ;
	char *memory ; /*points to real memory*/
	} ;

/*define some symbolic codes*/
#define PDSA_INTERNAL 1
#define PDSA_EXTERNAL 2
/*
Function profiles for the pdsa_ routines
*/
#ifdef __STDC__
extern void pdsa_attach(char *name, struct pdsa_ptr *uptr) ;
extern void pdsa_detach( struct pdsa_header *uptr) ;
extern int pdsa_free(char **begadr, char **endadr, struct pdsa_ptr *uptr) ;
extern int pdsa_get(int *numbytes, char **address, struct pdsa_ptr *uptr) ;
extern int pdsa_init(char *name, int size, int quantum, int mode, int item) ;
#else
extern void pdsa_attach();
extern void pdsa_detach();
extern int pdsa_free();
extern int pdsa_get();
extern int pdsa_init();
#endif

/*end of pdsa_defs.h */