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Annotation of sbbs/spawno/spawno.h, revision 1.1

1.1     ! root        1: /********************************************************************/
        !             2: /*   SPAWNO v4.0   EMS/XMS/disk swapping replacement for spawn...() */
        !             3: /*   (c) Copyright 1990, 1991 Ralf Brown  All Rights Reserved      */
        !             4: /*                                                                 */
        !             5: /*   May be freely copied provided that this copyright notice is    */
        !             6: /*   not altered or removed.                                       */
        !             7: /********************************************************************/
        !             8: 
        !             9: #ifndef __SPAWNO_H
        !            10: #define __SPAWNO_H
        !            11: 
        !            12: #include <stdarg.h>
        !            13: 
        !            14: #ifdef M_I86         /* MSC 5.x */
        !            15: #  ifndef _Cdecl
        !            16: #    define _Cdecl cdecl
        !            17: #  endif
        !            18: #endif /* M_I86 */
        !            19: 
        !            20: #ifdef __cplusplus
        !            21: extern "C" {
        !            22: #endif /* __cplusplus */
        !            23: void _Cdecl init_SPAWNO(const char *overlay_path, int swap_types) ;
        !            24: int _Cdecl spawnvo(const char *overlay_path, const char *name, const char **args) ;
        !            25: int _Cdecl spawnvpo(const char *overlay_path, const char *name, const char **args) ;
        !            26: int _Cdecl spawnveo(const char *overlay_path, const char *name, const char **args,const char **env) ;
        !            27: int _Cdecl spawnvpeo(const char *overlay_path, const char *name, const char **args,const char **env) ;
        !            28: int _Cdecl spawnlo(const char *overlay_path, const char *name, ...) ;
        !            29: int _Cdecl spawnlpo(const char *overlay_path, const char *name, ...) ;
        !            30: int _Cdecl spawnleo(const char *overlay_path, const char *name, ...) ;
        !            31: int _Cdecl spawnlpeo(const char *overlay_path, const char *name, ...) ;
        !            32: int _Cdecl systemo(const char *overlay_path, const char *command) ;
        !            33: 
        !            34:   /* This function is normally called only by the spawn..() and spawn..o()  */
        !            35:   /* functions                                                             */
        !            36: int pascal __spawnv(const char *overlay_path,const char *name,const char **args,unsigned int env) ;
        !            37: 
        !            38: #ifdef __cplusplus
        !            39: }
        !            40: #endif /* __cplusplus */
        !            41: 
        !            42:   /* This variable is used by the functions which override the standard     */
        !            43:   /* spawn..() functions; you should set it at the beginning of main().     */
        !            44:   /* It points at a string containing a list of directories to be used when */
        !            45:   /* swapping to disk, separated by semicolons.  If you use multiple       */
        !            46:   /* directories, they should be on different drives since for directories  */
        !            47:   /* other than the root, inability to swap to one directory implies       */
        !            48:   /* inability to swap to all others on the same drive.                    */
        !            49: extern const char *pascal ___spawn_swap_dirs ;
        !            50: 
        !            51:   /* The following variable determines whether SPAWNO is allowed to use XMS */
        !            52:   /* memory if available.  Set to 0 to disable XMS, 1 (default) to enable   */
        !            53: extern char _Cdecl __spawn_xms ;
        !            54: 
        !            55:   /* The next variable determines whether SPAWNO is allowed to use EMS     */
        !            56:   /* memory if available and XMS is either unavailable or disabled.  Set to */
        !            57:   /* 0 to disable EMS, 1 (default) to enable.                              */
        !            58: extern char _Cdecl __spawn_ems ;
        !            59: 
        !            60:   /* The next variable determines whether SPAWNO is allowed to use non-XMS  */
        !            61:   /* extended memory if available.  Set to 0 to disable extended memory,    */
        !            62:   /* 1 (default) to enable.                                                */
        !            63: extern char _Cdecl __spawn_ext ;
        !            64: 
        !            65:   /* Specify whether to swap the program's memory blocks in the upper       */
        !            66:   /* memory area under MSDOS 5.0 (requires DOS=UMB in CONFIG.SYS)          */
        !            67: extern char _Cdecl __spawn_swap_UMA ;
        !            68: 
        !            69:   /* Specify whether INT 23h and INT 24h handlers should be deactivated by  */
        !            70:   /* SPAWNO.  You will normally want to deactivate the handlers unless you  */
        !            71:   /* have elected to keep part of your program in memory while swapped.     */
        !            72:   /* Set to 1 to preserve the INT 23h and INT 24h handlers, 0 (default) to  */
        !            73:   /* disable the handlers.                                                 */
        !            74: extern char _Cdecl __spawn_keepints ;
        !            75: 
        !            76:   /* This variable specifies the number of paragraphs to keep resident      */
        !            77:   /* while swapped out (default 0 means minimum possible)                  */
        !            78: extern unsigned int _Cdecl __spawn_resident ;
        !            79: 
        !            80:   /* The last variable specifies how many paragraphs of the stack to keep   */
        !            81:   /* in memory while swapped out (default = 3, minimum = 2)                */
        !            82:   /* Note: the minimum value of 2 will only work on bare DOS; the more     */
        !            83:   /*  TSRs that hook INT 21h and chain with a simulated interrupt rather    */
        !            84:   /*  than a far jump, the more paragraphs of stack must remain resident--  */
        !            85:   /*  roughly one extra paragraph for every two such TSRs.                 */
        !            86: extern unsigned int _Cdecl __spawn_res_stack ;
        !            87: 
        !            88:   /* Manifest constants for calling init_SPAWNO() */
        !            89: #define SWAP_DISK 0
        !            90: #define SWAP_XMS  1
        !            91: #define SWAP_EMS  2
        !            92: #define SWAP_EXT  4
        !            93: #define SWAP_ANY 0xFF
        !            94: 
        !            95: #endif /* __SPAWNO_H */
        !            96: 
        !            97: /*=- End of SPAWNO.H -=*/

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